42results about How to "Adjust cooling capacity" patented technology

The invention relates to the field of carbon dioxide compressor performance tests, in particular to a carbon dioxide compressor performance test system with a transcritical / subcritical testing function. The system involves a test loop, wherein the test loop is formed on a main pipeline together with a to-be-tested carbon dioxide compressor; and the test loop comprises a first switching valve, a second switching valve, a third switching valve and a fourth switching valve which are arranged in sequence, wherein a transcritical circulating gas cooling section and a subcritical circulating condensation section which are connected in parallel are arranged between the first switching valve and the second switching valve, a transcritical circulating evaporation section and a subcritical circulating evaporation section which are connected in parallel are arranged between the third switching valve and the fourth switching valve, and the main pipeline is further provided with an adjusting and measuring assembly. The system has the advantages that the system covers the large-scale working conditions of the carbon dioxide compressor in transcritical / subcritical circulating, so that equipment used by test equipment is reduced, and the cost is reduced; and when different circulating tests are carried out through the same machine, disassembling and assembling of the machine are not needed, sothat operation is simpler and more convenient.

The invention discloses a water evaporative refrigeration system. Refrigeration is conducted according to the one-to-one correspondence relationship between the boiling point temperature of water andthe pressure. The water evaporative refrigeration system is mainly composed of an evaporator, a condenser and a negative pressure pumping device; the evaporator is mainly composed of a plurality of unit negative pressure cavities, an air supplying fan and an air outlet. Treated air flows in an air flue among all the unit negative pressure cavities, the interiors of the cavities can be pumped to bein different pressures according to the actual refrigeration temperature, and thus liquid water evaporates in the cavities to absorb the heat of the processed air; the negative pressure pumping device pumps out water vapor evaporated in the evaporator in time and exhausts the water vapor to the condenser, the set negative pressure in the negative pressure cavities of the evaporator can be maintained, the corresponding pressure when the water boiling point in the cavities of the condenser is equal to the environment temperature can be ensured, a valve located on a small pipeline a outside theevaporator can adjust the circulating water flow of the system, and thus the purpose of adjusting the refrigeration amount of the system is achieved indirectly.

The invention provides a small-size refrigerating and heating device for an automobile and relates to a refrigerating and heating device. The small-size refrigerating and heating device for the automobile comprises a refrigerating box, a heating box, a semiconductor refrigerating chip, a heat exchanger, temperature sensors, a microprocessor, a PID controller, and an adjustable power supply module. The refrigerating box and the heating box are connected with each other. The semiconductor refrigerating chip is arranged between the refrigerating box and the heating box. The heat exchanger is connected between an air supply opening and a return air opening of the heating box. The heat exchanger is respectively connected with the two ends of an automobile engine water heating system. The temperature sensors are arranged in the refrigerating box and the heating box respectively and connected with the input end of the microprocessor. The output end of the microprocessor is connected with the input end of the PID controller. The output end of the PID controller is connected with the adjustable power supply module. The output end of the adjustable power supply module is connected with the semiconductor refrigerating chip. Heat generated by an engine mainly serves as a heat source of the heating box. The refrigerating box achieves refrigeration through the semiconductor refrigerating chip. The refrigerating efficiency of the refrigerating box is improved through the microprocessor and the PID controller. Therefore, the energy utilization rate is high.

The invention discloses a single-compressor three-cold-head pulse tube refrigerator with free adjustment of input work and refrigeration capacity, including a numerically controlled AC power supply, a linear compressor, a pressure wave transmission pipeline group, an electronically controlled valve group, and a pulse tube refrigerator Cold head group, cooling water system, user-side low temperature circulation system and data acquisition and control system. The realization of the present invention provides a design and application scheme for variable power operation and adjustment of cooling capacity for a large cooling capacity low temperature system driven by a single compressor with three pulse tube cold heads, effectively solving the problem that the cooling capacity of conventional low temperature systems is difficult to follow the needs of user end equipment The problem of corresponding adjustment enables the same system to meet the needs of users with different cooling capacities, making the low-temperature system with large cooling capacity more convenient to control, stronger application scenario adaptability and higher energy efficiency ratio. For low-temperature refrigerators in smart grids, Applications in fields such as advanced electric power, rail transit, high-efficiency energy storage, and high-end communications are of very positive significance.

The invention relates to a pulse tube refrigerator in which an inertial tube and a small hole valve are jointly phase-modulated, comprising a compressor (1), a pulse tube unit (2) and a phaser, wherein the phaser comprises an inertial tube phaser (3) and the orifice valve phase modulator (4). The compressor is connected to the front end of the pulse tube unit, and the pulse tube unit includes a radiator, a regenerator, a cooling heat exchanger and a pulse tube which are connected in sequence. On the basis of , a small hole valve structure is added as a new type of composite phase modulator. Compared with the prior art, the present invention can make the pulse tube refrigerator adjust the cooling capacity in a wide temperature range, maintain high Bicano efficiency, and keep the efficiency stable.

A supercooling apparatus, comprising a supercooling unit (200). In the supercooling unit, a refrigerant passage (205) is connected to the liquid side communication pipes (21, 22) of a refrigerating device (10). When a supercooling compressor (221) is operated, a supercooling refrigerant is circulated in a supercooling refrigerant circuit (220), a refrigerating cycle is performed, and the refrigerant of the refrigerating device (10) flowing in the refrigerant passage (205) is cooled. The detected values of an atmospheric temperature sensor (231) and a refrigerant temperature sensor (236) are inputted into the controller (240) of the supercooling unit (200). The controller (240) performs the operating control of the supercooling compressor (221) based on only the information obtained in the supercooling unit (200).

An output-power-self-adapting refrigeration compressor control system which comprises a refrigeration compressor and a control system body. The refrigeration compressor is provided with a sealed shell. A machine core assembly is arranged in the shell. A motor is arranged on the machine core assembly and is provided with a stator, a rotor and a wire holder. A connection terminal I, a connection terminal VI and a connection terminal VII are arranged on the wire holder. The output-power-self-adapting refrigeration compressor control system is characterized in that the control system body comprises a PLC, a current collection module, a temperature collection module and a low-voltage control circuit; the wire holder is further provided with a connection terminal II, a connection terminal III, a connection terminal IV and a connection terminal V, the PLC is connected with the current collection module, the temperature collection module and the low-voltage control circuit in a communication mode, and the low-voltage control circuit is connected with the refrigeration compressor in a driving mode. The output-power-self-adapting refrigeration compressor control system is low in cost and convenient to operate, intelligent conversion of the three working states of the refrigeration compressor is achieved, the working efficiency of the refrigeration compressor is improved, the overall energy consumption of the refrigeration compressor is reduced, the refrigeration time is shortened, and the refrigeration efficiency is improved.

The invention discloses a piston-type variable frequency variable capacity refrigeration compressor, which comprises a crankcase and a variable capacity device. The crankcase is provided with a cylinder and a drainage groove; The seat is fixed with the crankcase, and there is a receiving hole in the connecting seat, the receiving hole communicates with the cylinder through the drainage groove, the adjusting bolt is set in the receiving hole, and the adjusting bolt is screwed to the receiving hole, and one end of the transmission shaft is the same as the output shaft of the driving motor. The shaft is fixed, the other end of the transmission shaft is slidingly connected with the adjusting bolt, and the driving motor is fixed with the connecting seat. The invention provides a piston-type variable-frequency variable-capacity refrigeration compressor, which can further adjust the cooling capacity of the compressor by adjusting the effective stroke volume of the compressor through a variable-capacity device.

The invention provides a refrigerator. The refrigerator comprises a freezing chamber, a refrigerating chamber, a cooling chamber and an air quantity adjusting part. The cooling chamber is provided with an evaporator, is located behind the freezing chamber, and is provided with a freezing air inlet leading to the freezing chamber and a refrigerating air inlet leading to the refrigerating chamber. The refrigerating air inlet is located right behind the freezing air inlet. The air quantity adjusting part is movably arranged between the freezing air inlet and the refrigerating air inlet and is configured to be controlled to move in the transverse direction of the refrigerator so as to open or close the refrigerating air inlet; and after the refrigerating air inlet is opened, the air quantity adjusting part can be controlled to move front and back to be close to or far away from the freezing air inlet so as to adjust the open area of the freezing air inlet. An air supplying structure of the refrigerator is simple, the effective volume of the refrigerating chamber is not occupied by the air supplying structure excessively, and when the refrigerating chamber stops refrigerating, no cold air is accumulated in a refrigerating air channel.