87results about How to "Solve uneven temperature" patented technology

The invention belongs to the technical field of electric heating tube manufacture, and relates to an electric heating tube using hexagonal boron nitride or mixture of hexagonal boron nitride and magnesium oxide as a heat conducting material, in particular to a mixed heat conducting material for a novel electric heating tube. A main body structure comprises a metal tube body, a mixed filler, a resistance wire and accessories comprising a fixed plate, porcelain beads, sealant, a plastic plug, a leading-out bar, a terminal electrodes and screws; a cavity structure of the metal tube body is invariantly bent into a circular, elliptical or spiral geometric structure; parallel structures at two end sections of the metal tube body are fixed on the fixed plate in an interval penetration mode, and fixed screws are arranged at two ends of the fixed plate; and the resistance wire is fixed and electrically connected on the central axis of the cavity of the metal tube body and parallel to two end points on two sides of the tube wall, and the mixed filler is filled between the resistance wire and the side wall of the metal tube body. The electric heating tube has the advantages of high stability and heat conducting efficiency, high-temperature softening prevention in inert gas, long service life, high quality, good insulating property, low dielectric constant and dielectric loss, and safe use.

The invention discloses a control method and a control device of an electric oven and the electric oven. The method comprises the following steps: when the electric oven heats to a preset target temperature under a heating mode, stopping heating; determining a heating duty ratio of the heating mode within a preset heating cycle, wherein the heating cycle includes the heating mode and a temperature maintaining mode after stopping heating; and conducting heating by virtue of the electric oven in accordance with the heating duty ratio. The scheme disclosed by the invention can overcome shortcomings of the prior art which is uneven in temperature, low in reliability, poor in user experience and the like, and the beneficial effects of uniform temperature, high reliability and good user experience can be achieved.

The invention is a centrifugal-temperature composite test box, and aims to provide a test box which can be installed and work on a centrifuge and realize a high / low-temperature calibration environment in order to provide a centrifugal-temperature composite calibration environment for an accelerometer. The centrifugal-temperature composite test box is mainly composed of a box body part, an expansion chamber and a gas circulation system. The test box and the accelerometer are separately installed. The box body part is a cylindrical sandwich structure including a heat insulation layer, a temperature carrying layer and an inner cavity. The centrifugal-temperature composite test box is implemented by the following scheme: the heat insulation layer is filled with heat insulation material, the temperature carrying layer is filled with temperature carrying liquid and is equipped with a temperature carrying liquid spiral circulation channel and a temperature carrying gas circulation channel, and the inner cavity is equipped with an air guide sleeve and an electric heating film; the expansion chamber is a closed cavity; the gas circulation system provides power for gas circulation in the cavity; and the temperature of the temperature carrying liquid is controlled directly or controlled by controlling the temperature of gas in the gas pipe, and heat exchange between the inner wall of a temperature carrying cavity and the gas in the inner cavity is utilized or the gas in the inner cavity is heated by the electric heating film so as to realize precise control on the temperature of the inner cavity.

The invention discloses a bonding method of silicon carbide seed crystals and a preparation method of silicon carbide single-crystal ingot. The bonding method of the silicon carbide seed crystal comprises the following steps: mixing silicon carbide powder, carbon powder and silicon powder, adding a binder, uniformly carrying out mixing to obtain mixed powder, coating a silicon carbide wafer with the mixed powder, placing the silicon carbide seed crystals on the mixed powder, and enabling the seed crystals to be tightly bonded with the silicon carbide wafer under an inert atmosphere at a temperature of 1500-2000 DEG C to obtain the silicon carbide bonded seed crystals, wherein no impurities are introduced. When the silicon carbide bonded seed crystals obtained through the method is used ingrowing the silicon carbide single-crystal ingot through a physical vapor transport (PVT) method in a silicon carbide crystal growth furnace, heat conduction is rapid, heat transfer is uniform, and the high-quality silicon carbide single-crystal ingot can be obtained. According to the method, the feeding space and the feeding amount of the raw materials are increased, so that the size of a singlecrystal ingot is increased, the wafer output of a single crystal ingot is increased, and operation cost of the silicon carbide crystal growth furnace is reduced.

The invention relates to a method for producing synthesis gas by catalytically reforming coal, natural gas and carbon dioxide. The method comprises the steps of preparing the synthesis gas and catalytically reforming a fluidized bed. The synthesis gas is obtained by catalytically reforming the coal, the natural gas and the CO2 fluidized bed, the ratio of H2 to CO is about 1, and the synthesis gas can be directly used as a raw material of oxo synthesis and F-T (Fischer-Tropsch) synthesis oil. The method has the advantages of energy conservation and emission reduction and environment improvement, meets the circular economy policy implemented by the country, and further meets the national requirement for establishing resource-saving and environment-friendly chemical enterprise.

The invention discloses a temperature control device for MPCVD equipment, the temperature control device comprises a plurality of substrate stages, the distance between adjacent substrate stages is 1mm to 10 mm, and each substrate stage is provided with a separate cooling water path, and the cooling water path is designed as a conventional cooling waterway, and can control the cooling speed of the substrate stages by controlling the flow speed and flow rate of cooling water. By controlling the temperature of the substrate stages, the temperature of a substrate during the diamond growth process is controlled, and the temperature of a base plate is controlled during the diamond deposition process. During the diamond growth process, the surface temperatures of diamonds are controlled by controlling of heat dissipation, so that the surface temperatures of the diamonds in the deposition process are close, the growth speed and quality of the diamonds produced in the same batch are consistent, and mass production is facilitated.

The invention discloses an integrated digital PCR system and a using method thereof. The system involves a high-density micro-cavity array digital PCR chip integrated with one cavity, an optical detection module, a hot water circulation temperature control module, a fluid control module and a central control module. When the system is applied to nucleic acid sample detection, firstly, the digitalPCR chip is fixed on an objective table of the optical detection module, and through pipes communicating with a sample pipe and a hot water tank are assembled at interfaces of the chip; and then, thecentral control module is started, relevant parameters of a control program are set, and the fluid control module, the hot water circulation temperature control module and the optical detection moduleare controlled through the control program to sequentially achieve sample filling, sample discretization, hot water circulation amplification, chip scanning recording, data analysis and other operations. Based on the combination of the micro-cavity array and the integrated cavity structure of the digital PCR chip, the system can enable the whole process of digital PCR detection to be completed ona single instrument, and the detection efficiency and the result reliability are improved.

The invention discloses a power battery pack heat dissipation device with a heat pipe device. The power battery pack heat dissipation device comprises a housing, a separator plate, a heat dissipationheat pipe, an air cooling mechanism and a water cooling mechanism. The inner cavity of the housing is divided into a heat dissipation cavity and a heating cavity for holding a battery core through theseparator plate; the evaporation end of the heat dissipation heat pipe is tightly attached to the battery core located in the heating cavity; the cooling end of the heat dissipation heat pipe runs through the separator plate and then, stretches into the heat dissipation cavity; the air cooling mechanism is installed on the outer side of the housing, and a heat dissipation air duct of the air cooling mechanism communicates with the heat dissipation cavity; and the water cooling mechanism is connected with the cooling end of the heat dissipation heat pipe. Meanwhile, the invention further discloses a heat dissipation method of the power battery pack heat dissipation device with the heat pipe device. Moisture and dusts in air can be prevented from being attached to the surface of the battery, so that the battery is protected, and the performance of the battery is guaranteed; and meanwhile, different working modes can be adopted in the heat dissipation process, and the effects of energy conservation and emission reduction are achieved under the condition that the heat dissipation efficiency is guaranteed.

The invention relates to the technical field of cooling equipment in the field of vacuum plating, and discloses a cooling plate which comprise a cooling plate body, wherein a circulating water channelis arranged in the cooling plate body, and the circulating water channel is a water channel with a water inlet channel and a water return channel parallel to each other. For the cooling plate provided by the invention, by arranging the circulating water channel with the water inlet channel and the water return channel parallel to each other in the cooling plate body, the heat exchange efficiencyof the cooling plate is increased, and the problem of non-uniform overall temperature of the cooling plate caused by water inlet and water return temperature difference is solved.

The invention provides a high-power thermally superconducting plate-fin combined radiator for rail transit, comprising: a thermally superconducting plate; a plurality of first bottom substrate spacers, the first bottom substrate spacers being positioned between partially adjacent thermal superconducting plates; a surface contacting with that thermal superconducting plate on both side of the spacerstrip of the first bottom substrate is provided with a first channel, and a plurality of through holes are arrange on the spacer strip of the first bottom substrate; a second bottom substrate spacerstrip positioned between adjacent bottom substrate spacer strip groups; at least one side of that space strip of the second bottom substrate is provided with a second channel on the surface contactingwith the thermal superconducting plate; the surface of the thermally superconducting plate contacting with the spacer strip of the first bottom substrate and the surface of the thermally superconducting plate contacting with the spacer strip of the second bottom substrate are provided with connecting through holes. A heat dissipation fin located on at least one surface of the thermally superconducting plate; The flange is located at the periphery of the thermal superconducting plate, the first bottom substrate spacer, the second bottom substrate spacer and the heat dissipation fin. The invention can effectively solve the problem that the temperature of the power device is not uniform.

The invention discloses a stirring tank which comprises a heat exchange device, a tank body, a tank top seal and a stirrer, wherein the heat exchange device comprises spiral heat exchange plates, a fluid inlet header and a fluid outlet header; the heat exchange plates comprise at least two overlapped heat exchange plates; hollow cavities are formed after the at least two heat exchange plates are overlapped; the hollow cavities, the fluid inlet header and the fluid outlet header form a communicated cavity; a material outlet is formed in the bottom of the tank body; a material inlet is formed in the tank top seal; the stirrer and the heat exchange plates are all positioned inside the tank body. By adopting the mode, the spiral lining heat exchange plates are arranged inside the stirring tank body, so that a material can be relatively uniformly heated or cooled, the temperature difference of the material inside the tank body is small, and the product quality is greatly improved.

The invention discloses an air-conditioner air guide structure, an air conditioner and an air-conditioner air-out control method, and relates to the technical field of air conditioners. Changing of anair duct structure can be achieved so that the air-supply direction of an air duct is changed, the air-conditioner using effect is improved, and the air outlet quantity cannot be decreased obviously.The air-conditioner air guide structure comprises an air-duct front wall, an air-duct rear wall and an air duct which is formed between the air-duct front wall and the air-duct rear wall, wherein anair deflector is arranged in the air duct, and a first driving assembly is connected to the air deflector and can drive the air deflector to translationally move in the air duct; and when the air deflector moves to the first position, the rear end of the air deflector abuts against the air-duct rear wall, and when the air deflector moves to the second position, the rear end of the air deflector abuts against the air-duct front wall. The air duct can be used for the air conditioner.

The invention discloses a wall body type wine cabinet, which is characterized by comprising a wine cabinet body consisting of heat insulation fixing elements, a middle side plate, a left side plate, a right side plate, a bottom plate, a back plate and a top plate, wherein the top plate is provided with an air outlet and an air return opening; an air return passage is arranged on the bottom plate; an air outlet passage is arranged under the top plate; the middle side plate is arranged between the air return passage and the air outlet passage; the bottom plate, the air return passage, the air outlet passage and the middle side plate form a plurality of wine storage chambers and are fixedly connected through the heat insulation fixing elements; one wine storage chamber corresponds to one sub air outlet passage and one sub air return passage; a sub air outlet is formed in the bottom of each sub air outlet passage; the top of each air return passage is provided with a sub air return opening; the back plate is arranged at the back side of the wine storage chamber. The wall body type wine cabinet has the beneficial effects that the installation is flexible; the modularized assembly is realized; meanwhile, the wall body type wine cabinet is put in positions of a partition wall or a partition part and a screen; the temperature and the humidity of the wine cabinet are controlled; the wine is stored in a best state, so that the quality of the wine is enabled not to be changed.

The invention provides an oven. The oven comprises an oven body with an opening in one side, an oven door, an upper liquid delivery pipe, a lower liquid delivery pipe, an upper ventilation pipe, a lower ventilation pipe and a vacuum pipe, wherein the oven body comprises an outer wall, an inner wall arranged in the outer wall in a sleeving manner, and a sandwich layer which is located between the outer wall and the inner wall and is spaced from the outer wall and the inner wall; an airtight outer hollow layer is enclosed by the outer wall and the sandwich layer, and an airtight inner hollow layer is enclosed by the sandwich layer and the inner wall; one side of the oven door is movably connected with the oven body, the oven door can be in seal fit with the oven body, and an inner space is formed by the oven door and the inner wall; the upper liquid delivery pipe and the lower liquid delivery pipe are separately located at the two ends of the oven body and communicate with the inner hollow layer; the upper liquid delivery pipe, the lower liquid delivery pipe and the inner hollow layer are used for the circulation of heat conducting liquid; the upper ventilation pipe and the lower ventilation pipe are separately located at the two ends of the oven body and communicate with the inner space, and the upper ventilation pipe, the lower ventilation pipe and the inner space are used for the circulation of dry air; and the vacuum pumping pipe communicates with the outer hollow layer.

The invention belongs to the field of low-temperature sterilizing devices, in particular to a multi-zone separately controlled plasma sterilizer which comprises two or more internal chambers and a vacuum system. Each internal chamber is connected with the vacuum chamber through a pipeline, and a connecting pipe between each internal chamber and the vacuum system is provided with a control valve. The invention overcomes the defect that the plasma sterilizer in the prior art can not meet the requirement of larger scale application, and has the advantages of low cost, convenient and flexible use and wide application range.

The invention relates to an electric oven inner container structure and a stone furnace electric oven, which is composed of a plurality of wall plates. At least one wall plate is made of a heat storage component. The base body of the heat storage component is made of a low-heat-conductivity material, or at least one wall plate is provided with the heat storage component. The base body of the heatstorage component is made of the low-heat-conductivity material. The heat source component made of the low-heat-conductivity material replaces an inner container material of an existing oven. Therefore, the problems that the temperature in the oven is not uniform and a heat source is single are solved. Meanwhile, the characteristic that the low-heat-conductivity material radiates far infrared raysin the heating process is utilized. The problem that food baking time is too long is solved, and the taste of the food is better.

The invention belongs to the technical field of electric heater control, and discloses a rotation control method, system and device for an electric heater of an air conditioner and application. The electric heater is installed on two rotating supports, and a motor controls the rotating supports to rotate. When the air conditioner operates, after a user sets an air supply angle, a program judges whether the current air supply angle is consistent with the internal position of an air duct where the electric heater is located, so that the frame plane of electric heating is perpendicular to the airdirection, air can uniformly pass through the electric heater, the temperature difference of an air outlet is reduced, and the user comfort is improved. According to the structure capable of enablingthe electric heater to rotate and control in the air duct and the corresponding control method, the problem that the temperature of the air outlet is uneven when the user sets the air sweeping and supplying mode is solved, and meanwhile the noise problem caused by the electric heater under the specific air volume is solved; different from a single assembly and control mode of an existing air conditioner, the air conditioner can be welcome in the market.

The invention discloses a kiln device for melting heating of glass. By a plurality of molybdenum rod electrodes which are vertically and uniformly distributed at the bottom of a pond and a combusting gun on a side wall of a kiln pond, electrical combined heating is formed, and the problem of unevenness of the temperature of vitreous humour of a glass kiln is solved. The temperature nearby the molybdenum rod electrodes, particularly the top ends of the molybdenum rod electrodes, is high; because the energy density nearby the molybdenum rod electrodes is high, nearby vitreous humour has high energy; the temperature of the vitreous humour with the unit mass nearby the molybdenum rod electrodes is increased, the vitreous humour flows upwards along the surfaces of the electrodes, and then moves along the center or a cold region, the vitreous humour of the cold region returns to a hot region due to change of static pressure, liquid flow flows from the surfaces of the electrodes, after meeting liquid flow which flows upwards at the top ends of the molybdenum rod electrodes, the speed and direction of the liquid flow are changed, the liquid flow can even return, a natural flowing direction and a forced flowing direction form an angle, then spiral combined flow which is homogenized with glass is formed, and evenness of the temperature of the vitreous humour is facilitated.

The invention discloses a quenched workpiece self-rotation mechanism in a full-automatic carrier roller quenching production line. The quenched workpiece self-rotation mechanism mainly comprises a nitrate quenching tank and the like. A lifting mechanism B and a lifting mechanism A are mounted in the nitrate quenching tank side by side front and back. Balance devices for keeping balance and guide devices for guide and limiting are arranged on the two sides of the lifting mechanism B and the two sides of the lifting mechanism A. A drive mechanism and a rotating mechanism are mounted below the lifting mechanism A. A limiting switch B is arranged at a workpiece station below the lifting mechanism A and the rotating mechanism. A sealing device is arranged above the workpiece station. A limitingswitch A is arranged on a motion channel above the sealing device. A limiting switch C is arranged at a workpiece station below the lifting mechanism B. By means of the design, workpieces can fast enter the position below the liquid level, the workpieces rotate through the rotating mechanism, flowing of a nitrate solution is accelerated through a stirring mechanism, the problem that the temperatures of all parts of the nitrate solution are not uniform is effectively solved, and therefore workpiece deformation is reduced.

The invention relates to the field of fuel cells, and in particular to a low-temperature quick start device for a fuel cell. The device comprises the following parts of a combustion chamber for supplying heat to the reforming chamber; a reforming chamber for converting methanol to hydrogen; a galvanic pile for converting hydrogen chemical energy into electrical energy; a solenoid valve for controlling hydrogen flow; a low-pressure hydrogen storage tank for storing hydrogen; a pressure sensor for detecting hydrogen pressure in the low-pressure hydrogen storage tank; a methanol supply module forsupplying methanol to the combustion chamber and reforming chamber; and a control module for controlling opening of the solenoid valve, reading the hydrogen pressure, adjusting the combustion chamberand supplying methanol for the reforming chamber. The low-temperature quick start device stores a part of hydrogen by adding a low-pressure hydrogen storage tank, and supplies hydrogen to the combustion chamber when the fuel cell system is started, especially at a low temperature start, so that the combustion chamber can be rapidly heated up to catalyze the methanol combustion temperature and shorten the startup time of the fuel cell.

The invention discloses a rear windshield glass electric-heating hot line and bus bar shape of an automobile. Bus bars which are connected and jointed with the line of each hot line are of a spindle shape or a radial shape. The rear windshield glass electric-heating hot line and bus bar shape has the advantages that the glass surface temperature at the bus bar is lower, the glass is difficult to break, the quality of the product is improved, sliver slurry is saved, and the production cost is lowered.

The invention relates to a multi-crystallizer horizontal continuous casting pouring box and a continuous casting process implemented by using the multi-crystallizer horizontal continuous casting pouring box. The pouring box consists of a flow guide box and a casting box, wherein the flow guide box and the casting box are communicated through a plurality of flow guide pipes, in addition, separation plates capable of dividing the casting box into a plurality of casing chambers are arranged in the casing box, and holes used for installing crystallizers are arranged on the side wall of each casing chamber. The multi-crystallizer horizontal continuous casting pouring box and the continuous casting process have the advantages that the multiple (multi-crystallizer) horizontal continuous casting is realized, the production efficiency and the casting success rate are effectively improved, the safety factor is high, and in addition, the defect of single dummy ingot failure can be fast overcome.

The invention provides an automatic control system for a shiitake mushroom culture room. The automatic control system comprises a master control upper computer, a PLC air conditioner controller, an air conditioner terminal, an ABB frequency converter, a CO2 transmitter, a fresh air valve and an air return valve. By setting various parameters on a touch screen, other terminal equipment such as an air conditioning unit, the frequency converter, the fresh air valve and the air return valve can be controlled, and aiming at the problem that the temperature of the room is not uniform, automatic turbulent flow can be achieved according to the temperature difference between the upper temperature and the lower temperature of the room, and regular turbulent flow can also be achieved. In order to solve the problem that a large amount of CO2 can be generated in the cultivation period of shiitake mushroom sticks, the CO2 concentration is detected, the fresh air valve, the air return valve, an exhaust fan and the like are automatically started according to set values, fresh air is automatically exchanged, high-concentration CO2 in the room is discharged outdoors, a timing fresh air exchange function can also be started, and fresh air is exchanged once every certain time. The automatic control system has an automatic air cooling function, if the environment temperature is far lower than the indoor temperature, equipment can be automatically converted into an air cooling mode, and therefore a large amount of energy is saved.

The invention discloses an urban rail vehicle auxiliary power supply system and method.The urban rail vehicle auxiliary power supply system comprises an auxiliary inverter inside each passenger room and connected with an air-conditioner unit.A plurality of air-conditioner compressors are arranged inside the air-conditioner unit.The urban rail vehicle auxiliary power supply system further comprises a first MVB communication train line, a VCU and a control switch inside each driver room, an intelligent air-conditioner controller inside each passenger room and X temperature sensors.The X temperature sensors are connected with the intelligent air-conditioner controllers of the corresponding passenger rooms.The control switch comprises a first switch.The two ends of the first switch are connected to the first MVB communication train line.The VCUs are connected with the first MVB communication train line.The auxiliary inverters and the intelligent air-conditioner controllers are connected with the VCUs.The power of the whole-train air-conditioner unit is dynamically adjusted, the output power of the auxiliary power supply system can be automatically adjusted according to the environment temperature, the energy utilization efficiency is greatly improved, the riding comfort is improved, and operation and maintenance workloads of drivers are lowered.

The invention relates to a method for uniformizing a temperature field of current assisted sintered nano-silver soldering paste on the basis of a DBC (Direct Bonded Copper) substrate. The shape of a copper layer of the DBC substrate and a region where an electrode pressure head after the nano-silver soldering paste is printed can be placed are combined; each special-shaped electrode is of a rightangle L shape; an interior angle of each special-shaped electrode is in transition of one fourth of an arc; before sintering, the electrodes are pre-pressed at both ends of the DBC substrate; appliedpulse direct currents uniformly flow the soldering paste; the sintering temperature field of the nano-silver soldering paste is uniformly distributed; and a chip is uniformly heated. According to theinvention, a problem of uneven temperature in process of rapidly sintering the nano-silver soldering paste by the currents is successfully solved; by designing the special-shaped electrodes applying the currents and position distribution, uniform distribution of the temperature field in the nano-silver soldering paste pulse current assisted sintering process and one-time rapid sintering connectionbetween a sintered nano-silver soldering paste IGBT chip / diode chip and the DBC ceramic substrate are implemented; obtained compactness reaches over 90%; mechanical intensity and anti-fatigue reliability of a sintering interconnection layer are greatly improved; and the service life is prolonged.

The invention discloses an oven with double rotating mechanisms. The oven comprises an oven barrel main body, wherein a vertical baking cavity is formed in the oven barrel main body; an isolation inner container barrel used for uniformly heating is arranged between a baking device and the baking cavity; a plurality of baking fork rods are vertically distributed at the periphery of the inner bottomof the baking cavity of the oven barrel main body; an oil collecting box is arranged on the rod wall of the bottom of each baking fork rod; the multiple baking fork rods are rotationally fixed on a tray in a penetration mode through supporting plate autorotation rods; a main driving device for driving the tray to rotate is arranged at the inner bottom of the oven barrel main body; a follow-up driving mechanism for driving the supporting plate autorotation rods to rotate is arranged at the bottom end of the tray; and the follow-up driving mechanism and the main driving device are in transmission connection with each other through a linkage mechanism for performing joint driving. By virtue of the oven, the baking cavity can be uniformly heated, and multi-rotation baking effects of revolution and autorotation of the baking object around the baking cavity can be realized in the baking cavity.

The invention discloses a signal excitation acquisition device and method for high-precision phase measurement for magnetic induction imaging. The device comprises at least 16 excitation collectors, wherein the excitation collectors are connected with collection amplifiers and excitation amplifiers respectively. The collection amplifiers are connected with multi-path switches 1, and the excitation amplifiers are connected with multi-path switches 2; and the excitation collectors are connected with a power switch time sequence controller. One-time acquisition and excitation are adopted, so that after current excitation and acquisition electrodes finish current acquisition, power is cut off simultaneously, and the next-time excitation and acquisition functions are realized by other two electrodes preheated during acquisition; and two electrodes can be preheated simultaneously in every acquisition, so that the problem of non-uniform temperature of an exciting coil in the process of transferring from excitation to reception after being powered on continuously is solved, and the measurement is less influenced by the temperature, power-on heat is balanced to the greatest degree, and phase drift is enabled to be minimum.

The invention provides a chip on film unit, and belongs to the technical field of liquid crystals. The chip on film unit comprises a soft dielectric layer, a plurality of lead pins, a first driving circuit module and a second driving circuit module, wherein the lead pins are positioned on the soft dielectric layer and are used for inputting signals, the first driving circuit module is connected with at least one part of the lead pins used for inputting the signals, in addition, a cascade lines are arranged between the first driving circuit module and the second driving circuit module for establishing cascade signals therebetween. The number of signal channels of each driving circuit module can be a half of the required number of the signal channels of the whole chip on film unit, so that the signal channels can be dispersed on a plurality of driving circuit modules, and the heat radiation efficiency is greatly improved.

The invention discloses a direct cooling double-system double-door refrigerator with a freezing chamber at the upper part. The refrigerator comprises a freezing chamber at the upper part and a refrigerating chamber at the lower part which is seperated by a central beam, and a freezing evaporator and a freezing evaporator board therein used in the freezing chamber, a refrigerating evaporator and a refrigerating evaporator board used in the refrigerating chamber, a refrigerating capillary, a freezing capillary and a three-way piece communicating with the freezing evaporator. The refrigerator is characterized in that: the refrigerating evaporator has a combined pipeline distributed structure for preventing frosting at the back of the refrigerating chamber. The combined pipeline distributed structure is provided with a refrigerating inlet section, a middle refrigerating coil pipe and a refrigerating straight pipe, and further provided with a rear refrigerating section for compensating the balance bending, and a refrigerating outlet section with a solution storage cushioning structure. The direct cooling double-system double-door refrigerator with the freezing chamber at the upper part of the structure has an obvious function of stopping the frosting at the back of the refrigerating chamber caused by liquid returning when direct cooling is adopted after the refrigerating chamber stop working.