53results about How to "Increase cooling temperature" patented technology

A structure of a hybrid vehicle includes a battery pack arranged on a floor panel and an exhaust pipe extending from an engine, passing below the floor panel, to an exhaust port. The battery pack has a secondary battery constituted by a plurality of battery cells stacked in a vehicle traveling direction for supplying electric power to a motor, and an intake chamber provided adjacent to the secondary battery in a substantially horizontal direction perpendicular to the direction along which the plurality of battery cells are stacked for supplying cooling air between each of the plurality of battery cells. The exhaust pipe is provided so that it passes immediately below the battery pack and passes a position displaced from a position immediately below the intake chamber. With such a configuration, a structure of a hybrid vehicle that suppresses reduction in the efficiency of cooling a secondary battery without placing a great limit on routing of an exhaust pipe is provided.

In a motor vehicle, when an intake air temperature Ta is not lower than a preset reference temperature Tref, warm-up drive control selectively uses an evaporated fuel processing acceleration operation curve, which gives a high level of a negative pressure in an intake manifold, to set a target drive point of an engine and controls the operation of the engine. This ensures good emission of the engine. When the intake air temperature Ta is lower than the preset reference temperature Tref and when the setting of a heating demand Hq requires heating, on the other hand, the warm-up drive control increases an EGR quantity from an ordinary level and switches over an operation mode of a cooling system for the engine to a warm-up circulation mode for making the flow of a cooling medium bypass a radiator.

An ultralow temperature refrigerator (R) using a mixed refrigerant containing a plurality of kinds of refrigerants having different boiling points. The refrigerator (R) comprises a main refrigerant circuit (38) provided with a criocoil (32) and a capillary tube (29) and a sub-refrigerant circuit (39) the upstream end of which is branched and connected to the upstream end of the main refrigerant circuit (38) and which is provided with a capillary tube (28). In order to ensure the flow of the liquid refrigerant for a supercooler (31) and to enhance the cooling eficiiency of the criocoil (32), the height of the sub-refrigerant circuit (39) is less than the height of the main refrigerant circuit (38). The flow of the refrigerant in a gas-liquid mixed state discharged from the primary side (31a) of the supercooler (31) and flowing into the sub-refrigerant circuit (39) is greater than the flow into the main refrigerant circuit (38), so that the flow of the liquid refrigerant into the sub-refrigerant circuit (39) is increased more than the flow into the main refrigerant circuit (38).

The invention relates to a preparation method of a polyethylene casting film The method comprises the following steps of: (1) uniformly dispersing a nucleating agent into an organic solvent, then uniformly mixing polyethylene particles, and controlling the mass of the nucleating agent to be 0.05-10% of that of the polyethylene particles; (2) evaporating a mixture obtained in step (1) in vacuum or at ordinary pressure to remove the organic solvent; (3) after the organic solvent is completely evaporated, raising a temperature to a crystallization temperature of 60-100 DEG C, so that the polyethylene particles are crystallized, and the crystallinity is controlled to be 65-90%; and (4) extruding the crystallized polyethylene particles to form a casting film, and preparing the polyethylene casting film. With the adoption of the method, the heat distortion temperature of a polyethylene film is raised, the strength of the polyethylene film is improved, the crystallization rate of the extruded film is high, and the requirement of production speed can be satisfied by soft water at normal temperature without chilled water after the cooling temperature is raised.

The invention relates to a low-temperature liquefaction system for dual cycle of a mixed working medium. The system comprises a first refrigeration cycle loop, a second refrigeration cycle loop and a feed gas pipeline, wherein a mixed refrigeration working medium is used in the first refrigeration cycle loop and the first refrigeration cycle loop consists of a first compressor, a first condenser,a main heat exchanger and a first throttling valve which are connected sequentially; a non-combustible pure working medium or a non-combustible mixed working medium is used in the second refrigeration cycle loop and the second refrigeration cycle loop consists of a second compressor, a second condenser, a distributed heat exchanger and a second throttling valve which are connected sequentially; and the feed gas pipeline consists of the distributed heat exchanger and a pipeline, feed gas after dust removal treatment is connected with the inlet of the distributed heat exchanger through the pipeline, and the outlet of the distributed heat exchanger is the outlet of the liquefied feed gas. The system has the advantages of flexible design, simpleness and compactness, low cost, high operationalefficiency, high system safety because the non-combustible working medium is used in the second refrigeration cycle, and remote cold delivering.