202results about How to "Increase the effective heat transfer area" patented technology

The invention discloses a thermal decomposition device of oil field wastes. The thermal decomposition device comprises a casing, wherein a flue and a heating cavity are formed inside the casing; the heating cavity is isolated from the flue; ribs are arranged on the casing with the heating cavity. Fume inside the flue flashes the casing with the heating cavity, so that the heat can be conducted; due to adoption of the ribs on the casing with the heating cavity, the heat exchange area is effectively increased when being compared with that of the prior art, and the heat exchange efficiency of the thermal decomposition device is improved.

The invention discloses an indoor machine of a two-tubular air conditioner, which comprises a housing, a left and a right tubular fan wheels, a heat exchanger, an air inlet and an air outlet, wherein the housing consists of a front panel assembly and a shell; the left and the right tubular fan wheels are vertically arranged in the housing; the heat exchanger is arranged in the housing and positioned at the rear side of the tubular fan wheels; the air inlet is arranged behind the housing and the air outlet is arranged in front of the housing; the shell is connected to the rear side of the front panel assembly, the inner side of the shell is provided with a box body corresponding to the heat exchanger; back parts of the box body and the shell protrude outwards, the protruding part of the box body is provided with the air inlet, and the protruding part of the shell is provided with an air inlet window corresponding to the air inlet; the heat exchanger is bent towards the protruding direction of the back of the box body and arranged at a position close to the air inlet; and the housing is also internally provided with a volute assembly positioned between the two tubular fan wheels, the volute assembly comprises a left volute, a right volute, and a connecting bulge for connecting the left volute and the right volute together, and the connecting bulge extends to the position close to the heat exchanger. The invention has the advantages of larger air inlet area, compact assembly, low cost, small noise and high heat exchange efficiency.

The invention discloses a plate-shell type nonsaturated evaporation condensing device comprising an upper housing body, a plate-shell type heat exchanger, and a lower housing body. The upper housing body is connected with the lower housing body by a water pump, and the heat exchange main body is the plate-shell type heat exchanger which is connected with the upper housing body and the lower housing body respectively. The plate-shell type heat exchanger comprises an upper tube plate, a lower tube plate, heat exchange plate bundles, a housing, a baffle, a gas-distributing pipe and a collector tube. The upper tube plate is provided horizontally, the lower tube plate declines in the direction of the flowing hot fluid, the plate type heat exchanger gets through holes in the upper tube plate and the lower tube plate with a in-line modus, and the baffle is disposed among the heat exchange plate bundles. The inventive device is provided with a large effective heat transfer area, even aqueous film allocation, rapid settling velocity, quick transfer of nonsaturated evaporation heat and moisture, anabatic liquid membrane fluctuation, enhanced turbulent flow, an attenuated liquid membrane laminar sublayer, decreased heat resistance, a small condensing resisting force and a remarkable condensing effect. Deposit and erosion are reduced, a mall floor space is provided, and the inventive device is suitable for condensing and cooling field.

A plate-fin heat exchanger having alternating layers for exchanging heat between fluids to be warmed against fluids to be cooled. One or both of the layers is subdivided into flow passages to allow for the flow of two or more fluids flowing through one of the layers to engage in indirect heat transfer with one or more fluids flowing through another adjacent layer. The flow through the heat exchanger is parallel to the width of the heat exchanger. The first and second layers provide a greater cross-sectional flow area for each of the fluids than otherwise would have been provided had the fluids flow been parallel to the length of the heat exchanger with layers thereof dedicated to the flow of each of the fluids.

The invention relates to a multitubular fixed bed reactor, which comprises at least one catalyst-loaded reaction tube longitudinally extending along a direction parallel to the axis of the reactor. The height of the reaction tube and the hydraulic diameter of the reaction tube's cross-section are in a ratio of 1-2000, preferably 10-1000, and more preferably 50-500. The reaction tube includes: one or more catalyst chambers, which are used for loading the catalyst to form a catalyst fixed bed; one or more inlet distribution chambers, which are used for leading a reactant flow into the reaction tube and distributing the reactant flow into the catalyst fixed bed; and one or more outlet collection chambers, which are used for collecting the reactant flow and leading the reactant flow out of the reaction tube. Specifically, through arrangement of the inlet distribution chamber(s) and the outlet collection chamber(s), the reactant flow passes through the catalyst fixed bed layer along a horizontal direction perpendicular to the axis of the reactor so as to contact the catalyst and react with the catalyst. The invention also relates to application of the multitubular fixed bed reactor in chemical reactions like endothermic or exothermic reaction.

The invention discloses a winding tubular heat exchanger provided with a vertical partition plate in a cavity. The winding tubular heat exchanger comprises a housing and a central barrel. The central barrel is arranged in the cavity of the housing to form an annular cavity. A plurality of winding tubes are winded in the annular cavity. A plurality of metal pore plates are arranged in the annular cavity and are vertically arranged in the annular cavity, and the winding tubes penetrate through the through holes formed in the metal pore plates. One end of each metal pore plate is connected to the inner wall of the housing, and the other end of each metal pore plate is connected to the outer wall of the central barrel. A gas-liquid even distributing device is arranged in the cavity between the metal pore plates and the top of the housing. The metal pore plates are vertically arranged in the cavity, so that one whole cavity is divided into a plurality of independent cavities, and refrigerants in the independent cavities do not flow into other cavities. Therefore, it can be ensured that liquid films of the housing-side refrigerants flowing into the independent cavities and an in-tube working medium inside the cavities perform full heat exchange, and the phenomenon that the refrigerants flow into other independent cavities due to hull inclination and then invalid heat exchange inside the original cavities is caused is avoided.

The invention discloses a condenser and an air conditioner comprising the same. The condenser comprises a left end flow collecting pipe, a right end flow collecting pipe, a liquid collecting pipeline communicated with the left end flow collecting pipe and the right end flow collecting pipe and a plurality of heat exchanging pipes connected between the left end flow collecting pipe and the right end flow collecting pipe in parallel. Two ends of the heat exchanging pipes are communicated with the left end flow collecting pipe and the right end flow collecting pipe, a refrigerant inlet is formed in the left end flow collecting pipe or the right end flow collecting pipe, and a refrigerant outlet is formed in the liquid collecting pipeline. The left end flow collecting pipe and the right end flow collecting pipe are used for separating liquid refrigerant formed after heat exchanging through the heat exchanging pipes from gaseous state refrigerant and guiding the separated liquid refrigerant to flow into the liquid collecting pipeline. By separating the liquid refrigerant formed through condensing, a large amount of space of the heat exchanging pipes can not be occupied by more and more liquid refrigerant, effective heat exchanging area of the heat exchanging pipes can be kept maximum all the time, a heat exchanging effect is good, and heat exchanging efficiency of the condenser is greatly improved.

The invention discloses a spraying type evaporator. The spraying type evaporator comprises a heat exchanger and a gas-liquid separator. The gas-liquid separator comprises a shell, a liquid inlet connection pipe extending into the shell, a gas return opening connection pipe extending into the shell, and a connector base which is arranged at the bottom of the shell and connected with a connection pipe. The inlet of the liquid inlet connection pipe is connected with a refrigerant outlet of a throttling mechanism of the previous stage. A partition plate is arranged between the liquid inlet connection pipe and the gas return opening connection pipe. The outlet of the liquid inlet connection pipe and the inlet of the gas return opening connection pipe are separated from each other through the partition plate. The gas-liquid separator is arranged, gas-liquid separation is conducted on throttled refrigerant, it is ensured that the refrigerant entering the heat exchanger is in a pure liquid state, liquid distribution of a liquid distributor can be more uniform, and therefore the heat exchange efficiency of the whole heat exchanger is improved, the heat conduction temperature difference is reduced, the energy efficiency ratio of running of a refrigerating unit is increased, and the aim of saving energy is achieved.

The invention relates to a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell and a cross-flow fan; the machine shell is provided with anair inlet and a strip-shaped air outlet which is used for supplying air into a room, two independent air guide plates which are arranged side by side in the extending direction of the air outlet are arranged at the air outlet, and each air guide plate is configured to be controlled to be pivoted around a rotating shaft, which is parallel to the extending direction of the air outlet, of the corresponding air guide plate so as to be used for adjusting an opening and closing state and / or an air outlet direction of an air outlet area corresponding to the air outlet and the corresponding air guideplate, and the rotating shafts of the two air guide plates are collinear or parallel; and the cross-flow fan is configured to be arranged in the machine shell in a rotatable mode around a rotating shaft which extends transversely along the machine shell, and comprises a variable-diameter impeller, wherein the radius of the variable-diameter impeller is gradually increased from the transverse two ends of the machine shell to the middle of the machine shell. Therefore, multi-mode dual-area air supply can be realized, moreover, strong air supply can be realized in a middle area of the air outlet,soft air supply can be realized in two end areas of the air outlet, moreover, soft transition from the middle area to the two end areas can be achieved, and meanwhile, different requirements of usersrequiring for instant-cooling and instant-heating effects and users requiring for soft and comfortable effects are met.

The invention discloses a plate-pipe composite heat-exchange-type evaporative condenser. The plate-pipe composite heat-exchange-type evaporative condenser comprises a fan, a water pump, a water distributor, and a water collection pond and further comprises a plate-pipe composite heat exchanger composed of connection among multiple plate-pipe composite heat-exchange sheets, a water inlet header and a water outlet header. The plate-pipe composite heat-exchange sheets comprise heat-transfer plate sheets and coil pipes formed by machining of a heat exchange pipe. Placement grooves are arranged in the heat-transfer plate sheets and matched with the coil pipes in terms of shapes. The coil pipes are arranged in the placement grooves. Heat conduction bonding layers are filled with the gaps between the coil pipes and the placement grooves. Compared with the prior art, the plate-pipe composite heat-exchange-type evaporative condenser has following beneficial effects: the heat conduction bonding layer enables the heat transfer plate sheets to be in full contact with the coil pipes such that the coil pipes have the finned effect through the heat transfer plate sheets and the effective heat exchange area can be effectively increased; the heat transfer plate sheets can introduce cooling water to form a continuous waterflow surface and increases the evaporation area of cooling water; and with an increased effective heat exchange area and an evaporation area of cooling water, heat exchange efficiency is raised and size of a condenser can be reduced.

The invention relates to the technical field of heat exchangers, in particular to a fin of a microchannel parallel-flow heat exchanger. The fin of a microchannel parallel-flow heat exchanger comprises a fin and a substrate, and is characterized in that: the substrate extends and distributes in a sine wave; each side wall of the sine wave of the substrate is provided with two sets of shutters consisting of a plurality of strips; each set of shutter raises along the surfaces on two sides of the substrate to form included angles with the surfaces of the side wall; included angles formed between the two sets of shutters on the same side wall and the surfaces of the substrate are mutually symmetric; after being folded in the extension direction of the sine wave, the shutters of adjacent side walls are coincide; and the flow direction of an air flow is perpendicular to the extension direction of the substrate. The fin of the microchannel parallel-flow heat exchanger has the advantages of ensuring proper resistance to air flow flowing in the fin, achieving optimal air flow, effective heat exchange area and heat exchange efficiency, along with easy manufacture, low cost and excellent mechanical performance.

The invention discloses a heat exchanging plate, a machining method and a heat exchanger, and relates to the field of heat exchanging equipment. Two flow gathering grooves and a groove-shaped flow channel are formed in the first surface of the heat exchanging plate, and the two flow gathering grooves are located at the two ends of the heat exchanging plate correspondingly; the groove-shaped flow channel comprises at least one hierarchic flow channel and net-shaped flow channels, wherein each hierarchic flow channel is located between the two flow gathering grooves in a communicating mode, and comprises two main flow channels which mutually communicate with the two flow gathering grooves correspondingly, and the two main flow channels communicate with each other through at least two first branch flow channels; the net-shaped flow channels are formed between adjacent first branch flow channels and are in fluid communication with the first branch flow channels; and meanwhile, the area of the cross section of each net-shaped flow channel is smaller than the area of the cross section of each first branch flow channel, and the hierarchic flow channels and net-shaped flow channels form leaf-vein-shaped fluid distributing structures. According to the heat exchanging plate, the machining method and the heat exchanger, through combined action of main driving force of the hierarchic flow channels and capillary force of the net-shaped flow channels, the distribution evenness of fluid is effectively improved, the effective heat transfer area is increased, so that the flow rate of the fluid under the same flow quantity is reduced, and therefore resistance is reduced.

The invention relates to a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell and a cross-flow fan; the machine shell is provided with anair inlet which is used for introducing air into the machine shell and an air outlet which is used for supplying air into a room, and an air guide plate which is used for adjusting an opening and closing state and / or air outlet direction of the air outlet is arranged at the air outlet; and the cross-flow fan is configured to be arranged in the machine shell in a rotatable mode around a rotating shaft which extends transversely along the machine shell, and comprises a variable-diameter impeller, wherein the radius of the variable-diameter impeller is gradually increased from the transverse twoends of the machine shell to the middle of the machine shell. The air supply amount of the cross-flow fan can be gradually increased from two transverse ends of the machine shell to the middle of themachine shell, so that the air supply amount is the largest in the middle position, and the air supply capacity of the middle area is improved. According to the wall-mounted air conditioner indoor unit, only through one simple design of arranging one cross-flow fan with the variable-diameter impeller only, the effects of strong air supply in the middle area of the air outlet, soft air supply in the two end areas of the air outlet, and the soft transition from the middle area to the two end areas can be achieved, and meanwhile, different requirements of users requiring for instant-cooling and instant-heating effects and users requiring for soft and comfortable effects are met.

The invention relates to a pot-type calcinator multi-level series fin type cooling device for coke after high-temperature calcination. The device comprises water inlet pipes, water outlet pipes and a plurality of annular cooling water sleeves and is characterized in that the plurality of cooling water sleeves are overlapped and fixedly connected, the outer wall of the inner side of each of the cooling water sleeves is provided with a plurality of fins, the fins on the cooling water sleeves are arranged into lines correspondingly, each line of the fins is located in the same vertical surface, the water inlet pipe and the water outlet pipe are correspondingly arranged at two ends of each of the cooling water sleeves, and except the water outlet pipe at the top cooling water sleeve and the water inlet pipe at the bottom cooling water sleeve, water inlet pipes and water outlet pipes of adjacent cooling water sleeves, which are located at the same end, are communicated through connecting pipes. The device has the advantages that the heat exchange area is large, coke cooling speed after the high-temperature calcination is fast, the discharge temperature is low, the working is reliable, and the like.

The invention provides an all-welded plate shell type stainless steel condenser and application thereof. The all-welded plate shell type stainless steel condenser is a key device in a thermodynamic system of a power plant. Concave-convex multi-point type stainless steel sheets are adopted in a high-vacuum negative-pressure rectangular case at a dead steam part; two sheets are provided with longitudinal welding lines between which tops of convex grooves are opposite to each other, so as to form a dead steam path which is of single flow path type; the other two sheets are provided with transverse welding lines, between which bottoms of concave grooves are opposite to each other, so as to form a circulation cooling water path which is separated into two equal flow paths by a case separator; the height of the convex grooves is equal to the depth of the concave grooves and is not less than 6mm; small convex grooves are arranged among convex grooves and small concave grooves are arranged among concave grooves. The dead steam exchanges heat with the circulation cooling water in a fair flow / cross flow manner from top to bottom by virtue of flow paths at two sides of the sheets, and is condensed into water and flows downwards in a mode of beads, and water gathered in a steam gathering chamber and a water gathering chamber flows out through a heat well condensed water outlet. The condenser has the advantages of compact structure, material saving, light weight, low production cost, short investment return period and is worthy of popularization and application in large scale.

The invention discloses a heat exchanger. The heat exchanger comprises a plurality of heat exchange cores arranged in the vertical direction, a first collecting main, a second collecting main and a communicating piece. A heat exchange pipe of the upper heat exchange core of every two adjacent heat exchange cores is communicated with a heat exchange pipe of the lower heat exchange core through the communicating piece. Every two adjacent heat exchange cores are located in the different planes. Due to the fact that every two adjacent heat exchange cores are located in the different planes, condensate water generated by every two adjacent heat exchange cores flows in the different planes, multiple different drainage paths are provided for drainage of condensate water, the drainage amount borne by each drainage path is greatly reduced, the drainage efficiency of the heat exchanger is improved, the frosting speed of the heat exchanger is effectively reduced under the outdoor low-temperature and high-humidity working condition, the frosting amount is reduced, the refrigeration and heat exchange capacity and the heat exchange performance of the heat exchanger are improved, and energy consumption is reduced.

The invention discloses a heat dissipation device of a camera control main board and a camera device. The heat dissipation device comprises heat dissipation silica gel and a heat dissipation fin. The heat dissipation silica gel is attached to the surface of the camera control main board away from the camera. The heat dissipation fin is disposed on the heat dissipation silica gel, and the edge position of the heat dissipation fin is provided with a heat dissipation plate extended along the direction opposite to the direction of the camera, and then the heat dissipation area of the heat dissipation fin is increased. The heat dissipation silica gel is disposed on the camera control main board, and the heat dissipation fin is disposed on the heat dissipation silica gel, and therefore the effective heat conduction area between the camera control main board and the heat dissipation fin is effectively increased, the heat dissipation silica gel has good heat conduction effect, and the heat conduction rate between the heat dissipation fin and the camera control main board is enhanced. The heat dissipation plate extended from the heat dissipation fin is used to effectively increase the heat dissipation area of the heat dissipation fin, and therefore the heat dissipation efficiency of the heat dissipation device is improved. The heat dissipation device is smart and noiseless, and is suitable for the heat dissipation requirement of the camera.

The invention belongs to the technical field of high molecular materials, and particularly relates to high-heat-conductivity silicone grease. The high-heat-conductivity silicone grease comprises the following components in percentages by mass: 50-60% of high-heat-conductivity filler, 1-2% of a surface modifier, 1-2% of a surface treatment agent and the balance of organosilicone oil. The high-heat-conductivity filler comprises 5-10% of modified graphene and 90-95% of copper powder with two different particle sizes, wherein a coating layer is arranged on the surface of the copper powder. The spherical copper powder with two particle sizes is adopted as a filler, so that the effective heat transfer area is increased; by coating the spherical copper powder with the two particle sizes, the high-temperature resistance and oxidation resistance of the heat-conductivity silicone grease are improved; the compatibility of the filler and the organosilicone oil is improved by modifying the graphene; and finally, the surface treatment agent is added into the system, so that heat resistance of the heat-conductivity silicone grease is reduced, and precipitation of the organosilicone oil is avoided. The invention also provides a preparation method of the high-heat-conductivity silicone grease, and the high-heat-conductivity silicone grease prepared by the method is high in heat conductivity, small in thermal resistance, good in heat resistance, good in compatibility with silicone oil and free of silicone oil precipitation after being placed for a long time.

To provide a hermetic electric compressor making an outdoor unit compact by storing a drive circuit unit in a hermetic vessel and surely performing transmission and reception of signals with outside.a compressor unit (11); a motor (12); and a motor driving module (13) having a power unit and a control unit, for operating the motor (12), wherein the compressor unit (11), the motor (12) and the motor driving module (13) are accommodated in the sealed vessel. The sealed type electric compressor allows the size of an outdoor unit to be reduced by accommodating the motor driving unit in the sealed vessel and reliably performs a signal transmitting / receiving operation to / from an exterior.

The invention discloses a water-based paint with high thermal conductive and insulating properties. The water-based paint comprises a water-based emulsion, auxiliaries and high thermal conductive andinsulating fillers, wherein the high thermal conductive and insulating fillers are composed of nano-scale fillers and micro-scale fillers; the mass ratio of nano-scale fillers to micro-scale fillers is (0.1-10):1; the high thermal conductive and insulating fillers at least include nitrides. The water-based paint with high thermal conductive and insulating properties disclosed by the invention is prepared in the manner of adopting a compounded high thermal conductive system, intensively studying on the influence of the filler size and distribution on the thermal conductive property of the water-based paint and utilizing the synergistic effect generated by the compounding of the variety, specific size and distribution of the thermal conductive fillers. The radiating property is obviously promoted while other physical and chemical properties, including insulating property, are basically kept constant.

The invention provides a semiconductor refrigeration refrigerator. Specifically, the semiconductor refrigeration refrigerator provided by the invention comprises an inner container, at least one semiconductor refrigerating sheet and a plurality of cold-end heat exchanging devices, wherein each cold-end heat exchanging device is configured to exist a flow and a phase-change heat exchange of refrigerant in the cold-end heat exchanging device so as to transfer cold at an cold end of the at least one semiconductor refrigerating sheet to a storage chamber of the inner container. Specifically, each cold-end heat exchanging device is provided with three refrigerant pipelines, each refrigerant pipeline is provided with an evaporating segment with a closed end, the evaporating segment extends downwards in a vertical plane in a bent manner, and evaporating segments of the three refrigerant pipelines of each cold-end heat exchanging device are respectively connected to a rear wall and two side walls of the inner container in a thermal manner. According to the semiconductor-refrigerated refrigerator provided by the invention, as the plurality of cold-end heat exchanging devices are provided, effective heat exchange area in thermal connection with the inner container of the refrigerator is enlarged significantly, and therefore energy efficiency of the semiconductor refrigeration refrigerator is improved significantly.

The invention discloses a low-temperature heat pump sludge drying device for controlling double heat exchangers by a single compressor. The low-temperature heat pump sludge drying device comprises a sludge channel, an air channel and a heat pump system, wherein the sludge channel is composed of a sludge inlet, a multilayer conveyer mesh belt connected end to end, and a sludge outlet; the air channel is composed of a fan, an air filtering device, evaporators and condensers; the fan is arranged below the multilayer conveyer mesh belt; the air filtering device, the evaporators and the condensersare arranged above the multilayer conveyer mesh belt; the heat pump system is composed of an evaporator, a condenser, a compressor, a liquid storage tank, a gas-liquid separator and an electronic expansion valve; the fan comprises a first fan and a second fan; and two groups of the evaporators and two groups of condensers are arranged. Double-channel air supply is performed by adopting double airoutlets of the two fans, the air supply quantity of a closed sludge drying room is increased, the heat and moisture exchange quantity between dried air and sludge is increased, and non-uniform distribution of the dried air in a rectangular box is avoided. The two groups of the evaporators and two groups of condensers are controlled by the same compressor, so that the effective heat exchange area of the two groups of the evaporators and condensers is enlarged, and the heat exchange effect is excellent.

The invention discloses a fractal netty phase change energy storage device. The fractal netty phase change energy storage device consists of an energy storage unit body and a refrigerating medium channel; the refrigerating medium channel is positioned in the energy storage unit body; the energy storage unit body consists of a shell, a heat transfer rib sheet and a phase change material; the heat transfer rib sheet adopts a fractal netty structure and is arranged in a shell; a non-heat-transfer rib sheet area in the shell is filled with the phase change material; and the heat transfer rib sheetadopts a fractal netty structure, the grade number is m grade, m is more than or equal to 2 and is an integer, the dispersing coefficient N of each grade of heat transfer rib sheet is equal to 4, namely, each j-th grade of heat transfer rib sheet generates 4 (j+1) grade heat transfer rib sheet, and the center of the (j+1) grade heat transfer rib sheet is positioned at four vertex angles of the j-th grade heat transfer rib sheet. The feature of the fractal netty structure is utilized, the effective heat exchange area of the energy storage device is increased and the heat exchange dead area ina tank body is reduced; meanwhile, the effective heat conducting coefficient between the heat transfer rib sheet and the phase change material is increased, and rapid transfer from point (surface) tosurface (point) is realized, so that the efficiency of the energy storage device is improved and energy loss is reduced.

The invention relates to a dual-channel heat transmission heat exchanger with a rectangular heating pipe and a manufacturing process of the dual-channel heat transmission heat exchanger. The heat exchanger comprises outer heat supply pipes the longitudinal sections of which are rectangular, wherein the outer end of each outer heat supply pipe is plugged through an end socket closure plate; a notch is correspondingly arranged on the pipe walls of the same ends of the two adjacent heat supply outer pipes, another notch is arranged on the other same ends of the next adjacent outer heat supply pipes are correspondingly, and the outer heat supply pipes are communicated through the notches; the outer heat supply pipes are internally provided with tap water heat absorption pipes which are communicated through tap water communicating pipes, and the tap water communicating pipes pass through the notches; and inner heat supply pipes are arranged in the tap water heat absorption pipes, and the inner heat supply pipes are communicated with a cavity body of the outer heat supply pipes. According to the heat exchanger and the manufacturing process, the effective heat energy is utilized fully, a double-pipe cold fluid wall of at the center of a pipe cavity is heated, the heat-transfer area is increased, heat fluid and cold fluid are heated in a circulating manner by three channels, and the heat transfer efficiency is improved. A stainless steel thin wall pipe, a plate manufacture punching, stretching and flanging are adopted; the thin wall stainless steel welding difficulty is reduced due to the embedding type, the side pinched, so that the welding is easy, and acid is filled in an inner channel for cleaning scale generated in the inner channel.

The invention relates to the technical field of heat pipes, in particular to a bisconical microchannel radiator with a thermosyphon loop. The bisconical microchannel radiator comprises a condensationend, an evaporation end and a refrigerant delivery pipe; the refrigerant delivery pipe is used for communicating the condensation end with the evaporation end; the condensation end is provided with acooling water tank; a microchannel condenser is arranged in a cavity of the cooling water tank; a heat-absorbing box is arranged at the evaporation end; the heat-absorbing box is of a cavity structure; a cavity is formed in the cavity structure; the microchannel radiator is arranged in the cavity of the heat-absorbing box; and a refrigerant outlet and a refrigerant inlet which penetrate through the top end of the heat-absorbing box are formed in the microchannel radiator. With negative pressure generated after refrigerant gas is condensed and gravity on condensed refrigerant liquid as circulating power, energy can be saved when the designed radiator obtains high heat exchange performance.

A flat tube comprises a first straight part, a second straight part and a curled part which enables the first straight part and the second straight part to be connected. The first straight part, the second straight part and the curled part are formed through the same flat tube, and the curled part is twisted by at least one circle, so that the first straight part and the second straight part are located on the same side of the curled part. The bending mode is quite special, bending precision can be improved by controlling the radiuses of all arc sections in the flat tube twisting process, especially the size of the curled part in the length direction of the flat tube is reduced, and therefore the effective heat exchanging area of a heat exchanger is improved. In addition, the invention further relates to the heat exchanger with the flat tube and a bending method of the flat tube.

The invention relates to a working medium contact type cooling system for a high-power electric power device. The working medium contact type cooling system comprises a liquid working medium box filled with an insulating heat-conduction liquid working medium, multiple mounting plates, the high-power electric power device, a header pipe liquid dispenser, and multiple liquid working medium spraying pipes, wherein the multiple mounting plates are vertically arranged in parallel; the high-power electric power device is mounted on one sides and / or two sides of the mounting plates; the header pipe liquid dispenser is connected with the liquid working medium box through a main pipeline; multiple liquid spraying openings are uniformly formed in the multiple liquid working medium spraying pipes; the multiple liquid working medium spraying pipes are vertically arranged on one sides and / or two sides of the mounting plates and connected with the header pipe liquid dispenser; the spraying directions of the spraying openings are corresponding to the position of the high-power electric power device; and the liquid working medium sprayed to the high-power electric power device from the liquid spraying openings flows back to the liquid working medium box. The vaporous liquid heat-conduction working medium is in direct contact with the heating surface of the device, so that any middle medium and any heat-transfer switching link are not required, and the heat exchanging efficiency is dramatically improved consequently.

A plate-fin heat exchanger having alternating layers for exchanging heat between fluids to be warmed against fluids to be cooled. One or both of the layers is subdivided into flow passages to allow for the flow of two or more fluids flowing through one of the layers to engage in indirect heat transfer with one or more fluids flowing through another adjacent layer. The flow through the heat exchanger is parallel to the width of the heat exchanger. The first and second layers provide a greater cross-sectional flow area for each of the fluids than otherwise would have been provided had the fluids flow been parallel to the length of the heat exchanger with layers thereof dedicated to the flow of each of the fluids.

The invention discloses a falling film scraper type multi-pipe evaporation and concentration device belonging to the technical field of biological medicine chemical equipment. The evaporation and concentration device comprises a concentration tank body, a power transmission mechanism, a group of periphery concentration tubes and one or more than one centre concentration tube, wherein a tank cavity of the concentration tank body is internally provided with upper and lower sealing plates; the upper and lower sealing plates are used for dividing the tank cavity into a cloth cavity, a steam heating cavity and a discharging cavity; the power transmission mechanism is arranged on the top of the concentration tank body; the periphery concentration tubes are arranged by surrounding the peripheral direction of the steam heating cavity, the upper end of each periphery concentration tube and the upper sealing plate are fixed and the upper end of each periphery concentration tube can extend in the cloth cavity, the lower end of each periphery concentration tube and the lower sealing plate are fixed, and periphery concentration tube cavities are internally provided with a first knifing mechanism which is in transmission connection with the power transmission mechanism; and the upper end of the centre concentration tube and the upper sealing plate are fixed and the upper end of the centre concentration tube can extend in the cloth cavity, the lower end of the centre concentration tube and the lower sealing plate are fixed, and a centre concentration tube cavity is internally provided with a second knifing mechanism which is in transmission connection with the power transmission mechanism. The falling film scraper type multi-pipe evaporation and concentration device provided by the invention has the advantages that the effective heat exchange area of the concentration tank body is notably increased under the condition of the concentration tank boy with same volume.