36results about How to "Time controllable" patented technology

A heat-pump hot water supply apparatus, for dissolving problems of delaying in heating rise-up time when re-starting, and ill influences upon starting characteristics, due to liquid refrigerant residing in an evaporator when the operation is stepped, within a heat-pump circuit thereof, comprises a heat-pump refrigerant circuit, in which a compressor, a water / refrigerant heat exchanger, a refrigerant adjusting valve, and an evaporator, in series, through refrigerant pipes, a direct hot-water supply circuit, into which is supplied hot water heated, obtained by heating water supplied from an outside via a water pipe by means the water / refrigerant heat exchanger, and a compressor operation controller means for stopping the compressor and also closing the refrigerant adjusting valve when the compressor stops the operation thereof, and for re-starting the compressor after opening the refrigerant adjusting valve when the compressor starts the operation, again, wherein the refrigerant within the evaporator is collected to the compressor side when the operation is stopped, and after stopping, front and back of the evaporator is brought into a sealed condition by means of a refrigerant adjusting valve and a back-flow preventing valve, thereby preventing the refrigerant from residing within the evaporator.

The invention discloses a method and a container for preparing and analyzing a fusion sample. The container includes a cavity for receiving a sample including a collection material and a noble metal, the cavity adapted to melt the sample and oxidize the collection material. The cavity includes a first region defined by a porous material capable of absorbing the collection material when oxidized and melted. The cavity also includes a second region defined by a material that cannot absorb the molten and oxidized collection material. The second region is capable of containing a volume of fusion sample. The container is arranged such that at least a portion of the remaining sample remains in the second region when the sample has melted and reduced in volume due to absorption of the porous material of the first region.

The invention belongs to the technical field of power system communication, relating to a laboratory icing simulating test method of optical power ground wires (OPGWs), which can simulate and test the performance changes of running lines in various icing thicknesses states in a laboratory. The method carries out an experimental comparative study on the electrical properties, the communication and the mechanical properties of the OPGWs under an icing condition by utilizing a laboratory icing simulating test system, mainly carries out the experimental studies on lightning resistance, short-circuit current, attenuation, tensile strength, stress strain and the like on the OPGWs with different structures, types, technical parameters, materials and the like and then determines a comprehensive solution on resistance of the OPGWs on icing disasters through analyzing test data.

The invention discloses a digital standard source based on precise time control. The digital standard source based on precise time control comprises a man-machine interface module, a signal processing and system control module, a digital waveform sequence storage module, a precise time control and protocol conversion module and an output interface module, wherein the man-machine interface module, the signal processing and system control module, the precise time control and protocol conversion module and the output interface module are connected in sequence; the digital waveform sequence storage module is connected with the signal processing and system control module. The digital standard source based on precise time control can simulate output of an on-site merging unit really and output digital messages according with the IEC 61850-9-1 / 2 / 2LE statute format, the number of ASDUs, the number of sampling points, and other communication parameters can be configured flexibly, influence on precision drift caused by ambient temperature or long-time working can be eliminated, the sent messages have time controllability, time control precision is superior to 100 ns, and the disperse degree of the messages is superior to 500 ns.

The invention belongs to the technical field of catalysts, in particular to a La 2 o 2 CO 3 Preparation method and application of Pd catalyst supported by nano triangular sheets. First prepare La 2 o 2 CO 3 The nanotriangular sheets were then loaded with Pd to prepare the catalyst. The present invention prepares La 2 o 2 CO 3 The method of nanotriangular sheets is relatively simple, the preparation conditions are easy to control, and the prepared La 2 o 2 CO 3 The morphology is uniform, the structure is stable, and the catalytic activity in the hydrogenation process of cinnamaldehyde after loading Pd is obviously better than that of the traditional loaded Pd catalyst, which has certain application value.

The invention relates to an OPPC (Optical Fiber Composite Phase Conductor) connector box dry withstand voltage test device and a test method. The OPPC connector body dry withstand voltage test device comprises a connector box (1), a test auxiliary extended OPPC optical cable (4), a test auxiliary extended ADSS (All-Dielectric Self-Supporting) optical cable (5), a voltage source and an optical attenuation monitor (7), wherein a high-voltage positive electrode (3) of the voltage source is connected with an upper box body of the connector box (1) through an applied voltage circuit (2), a high-voltage negative electrode of the voltage source is connected with the ground, one end of the test auxiliary extended OPPC optical cable (4) is connected with the upper box body of the connector box (1), the other end of the test auxiliary extended OPPC optical cable (4) is connected with the optical attenuation monitor (7) through a tail fiber (6), one end of the test auxiliary extended ADSS optical cable (5) is connected with a lower box body of the connector box (1), and the other end of the test auxiliary extended ADSS optical cable (5) is connected with the optical attenuation monitor (7) through the tail fiber (6). The OPPC connector body dry withstand voltage test device and the test method, disclosed by the invention, can be used for simulating and testing the withstand voltage performance of the OPPC connector boxes in different nominal voltage classes in an OPPC operating circuit under a corresponding dry withstand voltage condition.