5results about How to "Avoid temperature gradients" patented technology

The utility model discloses a refrigerant direct cooling and liquid cooling fusion cooling system, and aims to overcome the defects of high energy consumption, poor cooling performance and use cost increase of a cooling system in the prior art. The technical problem is solved through the following technical scheme: the battery pack cooling system comprises a refrigerating system, a water system for cooling a battery pack and a refrigerant direct cooling system, the water system comprises an evaporator, a circulating pump and a pipeline water electric heater, the refrigerating system comprises a liquid storage tank and a condenser; two ends of the liquid storage tank are respectively connected with the condenser and the evaporator, and an electronic expansion valve is arranged between the evaporator and the liquid storage tank; the refrigerant direct cooling system comprises a power module cooling cold plate, an evaporation pressure regulating valve and an electromagnetic valve; one end of the power cooling cold plate communicates with the liquid storage tank, the other end of the power cooling cold plate communicates with the evaporation pressure regulating valve, and the electromagnetic valve is arranged between the power module cooling cold plate and the liquid storage tank; and one end of the evaporation pressure regulating valve far away from the power module cooling is communicated with an air suction pipe of the refrigeration system.

The invention relates to the technical field of metal welding, and discloses a welding process of high-strength medium alloy carburizing steel, which comprises the following steps: preheating the whole weldment to 200-250 DEG C before welding; the overall temperature of a weldment is kept at 200-250 DEG C in the welding process; and after welding is completed, a weldment is integrally heated to 250-300 DEG C, and heat preservation is conducted for preset time. According to the scheme, a new preheating technology in the welding technology is provided for the high-strength medium alloy carburizing steel, overall preheating is adopted before welding, during welding and after welding instead of local preheating, the temperature ranges before welding and during welding are kept consistent, the temperature range after welding is slightly higher than the temperature ranges of the first two stages, it is advantageously kept that the temperature of a mother part in the whole welding stage is stable and uniform, and the welding quality is improved. The temperature gradient in the whole welding process is reduced to the minimum, and through appropriate process steps and welding parameters, it is guaranteed that weld joints do not have welding defects, and meanwhile the mechanical property requirements of products are met.

The utility model provides a kind of water cooling structure and outer rotor permanent magnet motor, belong to the technical field of motor, wherein outer rotor permanent magnet motor includes outer rotor structure, inner stator structure and two end covers;Water cooling structure includes cooling water channel and inlet and outlet water component;Cooling water channel is arranged in the inside of annular plate in inner stator structure;Inlet and outlet water component is arranged on inner stator structure, and is used to supply and discharge coolant to cooling water channel in circulation;Cooling water channel includes multiple direct current sections and multiple bending sections;Multiple direct current sections circumferential interval distribution in the inside of annular plate in inner stator structure, and the extension direction of direct current section is parallel to the axial direction of inner stator structure;Multiple bending sections are communicated between the end of adjacent two direct current sections, and close to the both ends of annular plate.The utility model passes through the combination of direct current section and bending section, makes coolant constantly flow through the both ends of annular plate, avoids temperature gradient to be generated at the both ends of inner stator structure, improves heat dissipation effect.

This utility model discloses a low-noise water heater, comprising: a heating element disposed at the bottom of a cavity; the heating element includes a heating tube and a heat spreader plate, the heating tube and the heat spreader plate being thermally connected, the heat spreader plate being attached to the bottom of the cavity, and the heating tube being spirally arranged; the ratio of the thickness of the heat spreader plate to the surface load of the heating tube is greater than or equal to 40%, and the thickness of the heat spreader plate is 3.5-5mm; wherein, the effective heat transfer area ratio of the heating tube and the heat spreader plate is greater than or equal to 50%, and the heating tube and the heat spreader plate cooperate to homogenize the heat generated by the heating tube; a first through hole is provided on the lower surface of the cavity, and a water inlet pipe passes through the spiral gap of the heating tube and the first through hole in sequence; a bracket is provided on the inner surface of the cavity, the bracket being disposed on the first through hole, and the bracket being used to buffer the water flow of the water inlet pipe. This device fundamentally solves the noise problem caused by uneven heating and bubble bursting during the heating process.

The application discloses an embryo in-vitro culture and in-situ monitoring system and method, and belongs to the field of online monitoring of embryo in-vitro culture. The system comprises: a high-precision microscope, which is a table type fixed structure and is provided with a stage; a culture unit, which is based on the structural design of the stage and is arranged on the stage, is used for accommodating embryos and providing a culture environment required by in-vitro development of the embryos; a thermostat, which seals the related part of the microscope containing the stage and provides a stable temperature environment for the culture unit; and a control unit, which is connected with the culture unit, is used for providing a multi-channel perfusion culture pipeline and driving and can perform time-periodic perfusion culture. The application wraps the microscope by the thermostat and adopts cascade closed-loop temperature control to provide a stable temperature and humidity environment; realizes fine shear force stimulation through time-periodic perfusion; realizes in-situ high-resolution imaging through adaptation of the high-precision microscope, does not need to transfer embryos, and significantly improves imaging quality and experimental efficiency.