74results about How to "Suppresses temperature fluctuations" patented technology

A conventional optical signal processing device had a disadvantage where the temperature dependency of the spectroscopic characteristics of a spectroscopic element causes a deteriorated performance. In order to solve the temperature dependency, there has been a method to form a plurality of grooves for dividing a core on the array waveguide of the AWG. However, this method cannot avoid an excess loss and causes a high manufacture cost. By directly controlling the modulation characteristic profile formed by an element device of a spatial light modulator, athermalization can be achieved in a simpler and low-cost manner. This consequently provides a remarkable reduction of the light coupling loss in the spatial optical system of the optical signal processing device. More accurate temperature compensation can be realized that copes with an actual behavior of the device to a temperature fluctuation, including causing factors of a complicated temperature fluctuation of the optical system.

The invention discloses a contact thermal resistance testing system with variable pressure and-temperature in a profound hypothermia area. The contact thermal resistance testing system comprises a testing device, a pressure loading device, a heating and temperature measuring device and a refrigerating device; the testing device comprises a vacuum cavity, a thermal insulation multilayer material, an anti-radiation cold shield, a solid thermal insulation material, a sample clamp, a testing platform and a vacuum cavity bottom plate; the pressure loading device comprises a pressure sensor, an airinlet pipeline, a pressure-bearing corrugated pipe and a thermal insulation screw rod; the heating temperature measuring device comprises a heating plate, a temperature sensor and a heating wire; therefrigerating device comprises an oxygen-free copper cold head, a refrigerating machine and a compressor; and the pressure loading device, the heating and temperature measuring device and the oxygen-free copper cold head are mounted in the vacuum cavity, the pressure-bearing corrugated pipe is fixed to the oxygen-free copper cold head and the solid thermal insulation material through the thermal insulation screw rod, the refrigerating machine is mounted on the vacuum cavity bottom plate, and all the devices are tightly connected through screws. The contact thermal resistance testing system with the variable pressure and-temperature in the profound hypothermia area has the advantages of easy operation, small temperature fluctuation, high operability, short test time, high precision and thelike.

The invention relates to the technical field of thermal energy power generation and discloses a supercritical carbon dioxide circulating system. The system comprises a compressing module, a heat source module, a turbine power generation module and a cooling module which are connected sequentially. The system further comprises a constant-temperature and constant-pressure module. The cooling moduleis connected with the compressing module through the constant-temperature and constant-pressure module. The constant-temperature and constant-pressure module comprises a constant-temperature chamber and a pressure stabilizing channel arranged in the manner of penetrating through the constant-temperature chamber. A heat exchange fin is arranged on the outer side wall face of the pressure stabilizing channel. The heat exchange fin is located in the constant-temperature chamber. The pressure stabilizing channel is filled with multiple damping balls. A circulating working medium outlet of the cooling module is connected with a circulating working medium inlet of the compressing module through the pressure stabilizing channel. According to the supercritical carbon dioxide circulating system, the constant-temperature and constant-pressure module replaces a large-capacity buffering tank, temperature and pressure fluctuation of circulating working media in the ocean jolting environment is reduced, and the ability of the circulating working media to maintain constant-temperature and constant-pressure parameters at an inlet of the compressor is improved.

The invention provides a ring-shaped shell-and-tube heat exchanger capable of commutating, consisting of a housing, an upper cover body, a lower cover body, a clapboard and a core body, wherein, the whole heat exchanger has a ring-shaped vertical structure and a hollow inner part; the housing has a hollow barrel-shaped interlayer structure, a constant temperature liquid input pipeline is positioned at the lower part of the outside of the housing and is transited gradually to a circular arc extending out horizontally along a straight line, the upper part of the outer side of the housing is provided with a linear constant temperature liquid output pipeline extending out horizontally; a ring-shaped groove structure matched by the upper cover body and the housing is provided the clapboard for controlling the number of tube passes inside, the outer side is provided with a heat exchanging medium input pipeline and a heat exchange output pipeline; the lower cover body has the same shape as the lower cover body, the inside is provided with the clapboard; the core body comprises a pipe, traverse baffles and pipe supports; the traverse baffles are sleeved on the pipe in a way of opposite one another and crisscross, the vertical length of the pipe is divided equally, the top part and the bottom part of the pipe are provided with the pipe supports; the core body is arranged inside the interlayer of the housing, the pipe supports and the edge of the housing are welded into a whole and are welded with the upper cover body and the lower cover body.

An image heating apparatus for heating a toner image in a nip while conveying a recording material on which the toner image is held is provided. The image heating apparatus includes a heater for generating heat by being supplied with electric power from an AC power source; a rotatable heating member for being heated by the heater; a pressing member for forming the nip in contact to the rotatable heating member; a temperature detecting portion for detecting a temperature of the heater or the rotatable heating member; and a controller for setting the electric power supplied to the heater every renewal cycle depending on a detected temperature by the temperature detecting portion. The renewal cycle is shorter in a rise period of the heater than in a period in which the recording material is conveyed in the nip.

An atomic oscillator includes a first unit and a second unit arranged to be separated from each other and a package including an internal space in which the first unit and the second unit are housed in a state in which the internal space is decompressed to pressure lower than the atmospheric pressure. The reflectance of the outer surfaces of the first unit and the second unit to an electromagnetic wave having a wavelength of 4 μm is equal to or higher than 50%.

A direct cooling type refrigerator capable of increasing the heat exchange performance of a refrigerant, thereby rapidly cooling its storage compartment. The refrigerator includes an outer casing defining an appearance of the refrigerator, an inner casing arranged within the outer casing, and defined with a storage compartment, an insulator interposed between the outer casing and the inner casing, a compressor for compressing a refrigerant, and an evaporator arranged to be in contact with the inner casing, and adapted to cool the inner casing in accordance with evaporation of a refrigerant passing therethrough.

A light-emitting device module includes a temperature variable device including a temperature control surface subjected to temperature control, a light-emitting device including a first electrode and mounted on a portion of the temperature control surface, a first terminal for supplying electric power to the first electrode, and a wire that causes the first terminal and the first electrode to conduct. The wire is thermally connected to the other portion of the temperature control surface.

A backlight apparatus comprises a light emission control unit which controls light emission of each of a plurality of light source blocks; a luminance detecting unit which detects a luminance of the light source block; and a correcting unit which successively executes a correcting process for the plurality of light source blocks by allowing one light source block to emit light so that a light emission amount of the concerning light source block is corrected on the basis of a detected luminance value and a target value thereof; wherein a temperature fluctuation suppressing process is executed when the correcting unit executes the correcting process, so that a plurality of the light source blocks, which include the light source block assumed to emit light in the correcting process to be executed next time, are simultaneously allowed to emit light for a predetermined period at a predetermined luminance.

An alignment apparatus includes driving means having a movable element and a stator, a measurement unit which measures a position of a moving member moved by the driving means using measurement light, and a discharging unit to discharge gas existing in an optical path of the measurement light. The discharging unit is provided to the stator.

The invention discloses an intelligent air valve having the technical advantages that the structure is simple and the valve opening is adjusted flexibly. The intelligent air valve structurally comprises an air door frame, an air door damper and a step driving device; the air door damper is hinged to the inside of the air door frame via an articulated shaft; the articulated shaft is fixedly connected with the air door damper; and the step driving device is in transmission connection with the articulated shaft of the air door damper. According to the intelligent air valve having the structure, the technical effect of automatically adjusting the valve opening can be achieved. When the intelligent air valve is used, pulse signals are transmitted to a power device of the step driving device through a controller, the opening angle of the air valve can be accurately controlled, and strong structure support is provided for flexibly controlling cold air inlet volume in a refrigerating chamber.

The present invention provides an absorption type refrigerator which realizes refrigerant pump protection and can restrain temperature variation of refrigerant. An absorption type cold water and warm water dispenser (100) comprises the following components: a high-temperature regenerator (5), a low-temperature regenerator (6), a condenser (7), an evaporator (1) and an absorber (2). The invention is characterized in that the evaporator (1) is provided with the following components: a refrigerant pump (P3) which pumps the refrigerant that is stored in a refrigerant storing part (1B) in the evaporator; a refrigerant pipe (34) for connecting the refrigerant pump (P3) with a dispenser (1C) which is configured above a heat transfer pipe (14A) of the cold / hot water pipe (14); a branch pipe (35) which is branched from the refrigerant pipe (34) and is connected below the heat transfer pipe (14A); and a float valve (41) which adjusts the amount of refrigerant which circulates in the branch pipe.