50results about How to "Reduce suction temperature" patented technology

The invention discloses a high-temperature-stable La(Fe,Si)13-based multi-interstitial-atom hydride magnetic refrigeration material with large magnetic entropy change and a preparation method thereof. By a method for introducing interstitial hydrogen atoms into an interstitial mother alloy which is La1-aRaFe13-bSibXc through hydrogen absorption treatment, a compound which is La1-aRaFe13-bSibXcHd shown as a chemical formula is prepared, wherein the compound has a cubic NaZn13 structure; R is one or more or the combination of rare earth elements; and X is one or more or the combination of C, B and the like. During the hydrogen absorption treatment, required hydrogen content can be achieved through primary hydrogen absorption by controlling hydrogen pressure, temperature and time. The compound can keep stable performance at the temperature of between room temperature and 350 DEG C and under the normal pressure, namely the hydrogen atoms can stably exist in gaps; moreover, the Curie point can be continuously and greatly adjusted in a range from180 K to 360 K through composition change, magnetic entropy change which is over two times higher than the magnetic entropy change of metal Gd can be achieved near room temperature, and loss caused by magnetic hysteresis is avoided. The refrigeration material is a very ideal room-temperature magnetic refrigeration material.

A turbocharger-equipped engine comprises: an intake port (6) and an exhaust port (7), which are connected to a combustion chamber (5); a surge tank (12); and a turbocharger (21) having a turbine (24)located at a position along the length of an exhaust passage (13), the turbocharger (21) also having a compressor (22) rotating with the turbine (24). The turbocharger-equipped engine further comprises: a waste gate valve (26) for regulating the supercharging pressure of the turbocharger (21); a throttle valve (15) provided in an intake passage (17) between the compressor (22) and the surge tank (12); and a control device (14) for controlling the operation of both a control valve and the throttle valve (15). When the engine is operated in a full-load operation range, the control device (14) sets the maximum degree of opening of the throttle valve (15) to the degree of opening closer to the closed side than the degree of opening corresponding to a fully opened throttle position and controlsthe throttle valve (15) so that the compressor efficiency of the compressor (22) will be higher than compressor efficiency corresponding to the fully opened throttle position. The compressor has increased efficiency when the engine is operated in the full-load operation range, and the output of the engine is further increased.

The invention discloses a compressor exhaust muffler, which is used in the field of compressors, comprising a cavity (32) provided with an intake pipeline (31) and an exhaust pipeline (33), and the cavity (32) is connected to the intake pipeline. (31) and the exhaust pipeline (33) form a muffler cavity, and the cavity (32) is formed by sealing a thin-walled metal material with a certain thickness, and the cavity (32) is installed in the compressor shell, and the shell It includes an upper shell (2) and a lower shell (1). In the compressor exhaust muffler, the cavity (32) is installed on the inner surface of the upper end of the upper shell (2), and the shape of the upper surface of the cavity (32) is similar to that of the inner surface of the upper shell (2). After installation, the upper surface of the cavity (32) is completely attached to the inner surface of the upper shell (2). The heat of the exhaust muffler cavity (32) is transferred to the upper shell (2), and is quickly transferred to the environment through the upper shell (2). The present invention reduces the temperature inside the compressor through such a design.

The invention provides a double-temperature condensing two-stage compressing heat pump system. The double-temperature condensing two-stage compressing heat pump system is characterized by comprising a high pressure stage compressing mechanism, a low pressure stage compressing mechanism, a high temperature stage condensing mechanism, a low-temperature stage condensing mechanism, a high temperature stage evaporation mechanism, a low temperature stage evaporation mechanism, a frictional condensing mechanism, a heat exchanging mechanism, a first throttle mechanism, a second throttle mechanism and a third throttle mechanism; the high pressure stage compressing mechanism, the high temperature stage condensing mechanism, the frictional condensing mechanism, the low temperature stage condensing mechanism, the first throttle mechanism, the low temperature stage evaporation mechanism, the low pressure stage compressing mechanism and the heat exchanging mechanism are sequentially connected to form into a loop; the frictional condensing mechanism is connected with the second throttle mechanism and the third throttle mechanism; the third throttle mechanism is connected with the high pressure stage evaporation mechanism; the high pressure stage evaporation mechanism is connected with the low pressure stage compressing mechanism; the second throttle mechanism is connected with the heat exchanging mechanism. The double-temperature condensing two-stage compressing heat pump system has the advantages of reducing energy loss, improving stability of system operation, meanwhile enabling low temperature heat source in different stages to be used and enabling heat of a low temperature condensing mechanism to be fully used.

The invention provides a multi-compressor dual-grade compression low-temperature machine unit. The problems that a single-grade compression low-temperature machine unit in the prior art is short in service life and high in maintenance rate are solved. The multi-compressor dual-grade compression low-temperature machine unit comprises a first-grade low-pressure compression device and a second-grade high-pressure compression device. The compression process is divided into a first-grade low-pressure compression part and a second-grade high-pressure compression part, wherein after a refrigerant discharged by the first-grade low-pressure compression part is cooled by a mixing barrel, the temperature of the refrigerant is reduced to saturation temperature under the pressure, and the refrigerant enters a second-grade compressor of the second-grade high-pressure compression part, so that the air-absorbing temperature of a compressor of the second-grade high-pressure compression part is reduced, the running working condition of the second-grade compressor is greatly improved, the compression ratio is reduced, and the service life of the compressors is prolonged.