58results about How to "Avoid mixed flow" patented technology

The invention discloses a control system for improving the operation environment of substation equipment, comprising an air intake, an intelligent ventilation regulator, an air outlet, an SF6 (sulfur hexafluoride) overflow port, a temperature sensor and an intelligent control unit, wherein the air inlet and the air outlet are arranged on the wall surface of the same side, the air outlet is higher than the air inlet, and the SF6 overflow port is arranged on the bottom of the wall surface at one side close to the air outlet. According to the control system, air flows in an indoor substation, an underground substation and other similar sealed space environments are effectively organized, mixed flow and turbulence generated by the ventilation of the common fan can be avoided, the natural convection form for the air flow to cover a heat source body through the lower part of a heating element from bottom to top can be furthest kept, and the aerated cooling efficiency of the surface of the heat source body is greatly improved.

The invention relates to a perfusion fixation device and a perfusion fixation method for a small animal experiment. The device comprises a pedestal, wherein the upper end face of the pedestal is provided with a first syringe fixing seat, a second syringe fixing seat, a first guide sliding chute and a second guide sliding chute; the first guide sliding chute corresponds to the first syringe fixing seat; the second guide sliding chute corresponds to the second syringe fixing seat; a first slide block is arranged in the first guide sliding chute in a sliding fit manner; a second slide block is arranged in the second guide sliding chute in a sliding fit manner; a first step motor and a second step motor are arranged in the pedestal respectively; the first step motor is connected with the first slide block through a first lead screw nut mechanism; the second step motor is connected with the second slide block through a second lead screw nut mechanism; both the first step motor and the second step motor are electrically connected with a motor control circuit; the pedestal is provided with a perfusion flow speed adjusting key and a motor control switch; and the perfusion flow speed adjusting key and the motor control switch are both electrically connected with the motor control circuit. The device and the method have the advantages of good perfusion effect, convenience in operation and simple structure.

The invention discloses a horizontal anaerobic reactor which consists of a feed hole (1), a reactor main body (2), a gas collection chamber (3), a dreg settling zone (4), a dreg collection hopper (6) and an overflow groove (7). The reactor is characterized in that the reactor main body (2) has a cylindrical tubular structure, the rectangular gas collection chamber (3) is arranged at the top of the reactor main body (2), a biological fuel gas outlet (9) is arranged above the gas collection chamber (3), the semicircular dreg settling zone (4) is arranged at the bottom of the reactor main body (2), the feed hole (1) is arranged at one end of the reactor main body (2), the overflow groove (7) is arranged at the other end of the reactor main body (2), a discharge hole (11) is arranged on the overflow groove (7), the end of the dreg settling zone (4) is connected with the dreg collection hopper (6), and a sludge outlet (12) is arranged under the dreg collection hopper (6). The reactor can solve the problems of mixing of dreg floating and settled dregs and mixing cracking system and material system in the course of the anaerobic fermentation of high solid materials, and is characterized by energy saving, high efficiency and automatic control.

The invention discloses a semiconductor refrigeration module, a space air-cooling heat dissipation device and space equipment, and relates to the field of aerospace. The semiconductor refrigeration module comprises a cold plate, a semiconductor refrigerator and an air cooling heat exchanger, the hot end of the semiconductor refrigerator makes contact with the cold plate, and the cold plate communicates with a liquid loop and is used for enabling liquid in the liquid loop to exchange heat with the hot end of the semiconductor refrigerator; the cold end of the semiconductor refrigerator makes contact with the air cooling heat exchanger, and the air cooling heat exchanger communicates with a gas loop and is used for enabling gas in the gas loop to exchange heat with the cold end of the semiconductor refrigerator. Stable and safe refrigeration can be achieved in the space environment, and due to the fact that semiconductor refrigeration has the advantages of being simple in structure, small in size, light in weight, short in response time and high in controllability and the thermal control temperature range is large, the practicability is higher, and the refrigeration requirement in the space environment can be met.

The invention discloses a novel heat exchanger core, and belongs to the technical field of machine design. The novel heat exchanger core comprises n first fluid heat exchange plates and m second fluid heat exchange plates. The n first fluid heat exchange plates and the m second fluid heat exchange plates are arranged alternately. The first fluid heat exchange plates carry first heat exchange fluid, and the second fluid heat exchange plates carry second heat exchange fluid. Etching channels are etched in the first fluid heat exchange plates and the second fluid heat exchange plates correspondingly. Each etching channel comprises a heat exchange channel and a guide channel. Each heat exchange channel comprises straight channel bodies and oval channel bodies which are arranged alternately, wherein the straight channel bodies communicate with the oval channel bodies, and the long axes of the oval channel bodies and the center axes, in the fluid flowing direction, of the straight channel bodies are located on the same straight line. The guide channels are connected with the heat exchange channels and extend to the edges of the plates. According to the heat exchanger core, a gradual-contracting and gradual-expanding structure is adopted so that the heat exchanger core can adapt to a using condition with low working medium cleanliness, and the requirement for the cleanliness of fluid working media is lowered.

The invention provides a micro-module data center used for solving the problem that an existing data center micro-module needs external circulation heat dissipation, and is low in refrigeration efficiency, large in occupied area and difficult to assemble; the micro-module data center disclosed in the invention comprises a comprehensive cabinet and at least one set of IT equipment cabinet; the comprehensive cabinet comprises a cabinet body with a containing cavity, a power supply assembly, a monitoring alarm assembly and an air conditioner; a front door body is arranged on the front side of the cabinet body, and a rear door body is arranged on the rear side of the cabinet body; a closed space is defined by the cabinet body, the front door body and rear door body; the air conditioner is arranged at the bottom of the containing cavity; a cold air channel is formed between the air conditioner and the front door body, and a hot air channel is formed between the air conditioner and the rear door body; the air conditioner can draw cold air from the air conditioner to the cold air channel, and can draw the hot air from the hot air channel to the air conditioner; and according to the micro-module data center, the isolation design of closing the cold and hot channels is adopted, so that gas mixing is avoided, the return air temperature is greatly improved, the refrigeration efficiency is improved while the PUE is reduced, the space is saved, and the rapid arrangement, the visual display and the intelligent management are achieved.

The invention discloses a shutter and a power vehicle using same. The shutter comprises a shutter frame and a shutter fan, wherein the shutter fan is connected with a power device in a transmission manner; the shutter frame comprises a side shutter frame section and a top shutter frame section which are arranged on the side end surface and the top end surface of a carriage; the shutter fan comprises a shutter fan unit which is arranged inside the side shutter frame section and the top shutter frame section; the shutter fan unit comprises shutter blades which are rotatably assembled in the corresponding shutter frame section by shutter shafts and a connecting rod for driving the shutter blades to rotate; the connecting rod drives the shutter blades to rotate by driven shafts which are rotatably arranged on the connecting rod at equal distance and are fixedly connected with each shutter shaft in a one-to-one corresponding manner; the connecting rod and any two adjacent driven arms form a parallel four-bar linkage; the shutter shafts of the shutter fan unit are directly or indirectly connected with the power device in a transmission manner. The power device provides power to achieve the synchronization action of each shutter fan unit, so that the shutter frame is achieved to be opened and closed, thus the operation is simple; air enters from the side shutter frame section and is exhausted from the top shutter frame section, so that the mixed flow of the air inlet and the air outlet is avoided, thus the requirements for an electric generator in the power vehicle carriage are satisfied.

The invention discloses a drainage control method of a clothes processing device and the multi-tub clothes processing device. The clothes processing device at least comprises a first washing tub and asecond washing tub. A drainage pipeline of the first washing tub and a drainage pipeline of the second washing tub are communicated with each other and independently controlled to be opened or closed. When the first washing tub reaches the drainage process, whether the drainage pipeline of the second washing tub is opened or not is judged, if yes, the drainage pipeline of the first washing tub isnot opened until the drainage pipeline of the second washing tub is closed, otherwise the drainage pipeline of the first washing tub is opened. The problem is solved that when a multi-tub clothes processing device conducts drainage through a shared drainage pipeline, washing water in other washing tubs flow back into one washing tub, and clothes are contaminated, and especially the problem is avoided that vertical washing tubs conduct drainage or dewatering operation, and washing water in the upper washing tub is poured downwards into the lower washing tub.

The invention provides a centrifugal fan, which comprises a fan frame and an impeller accommodated in the fan frame, wherein the fan frame comprises a bottom plate, a cover plate and side plates, the side plates are positioned between the bottom plate and the cover plate, the bottom plate comprises an inner surface facing the impeller and an outer surface opposite to the inner surface, the middle part of the bottom plate is provided with a fixing seat, the impeller is rotationally and fixedly arranged on the fixing seat, the bottom plate is provided with a plurality of first air inlet openings penetrating through the inner surface and the outer surface on the outer periphery of the fixing seat, a first connecting arm is formed between the two adjacent first air inlet openings, and is connected between the fixing seat and the bottom plate, each first air inlet is provided with an arc-shaped outer side edge opposite to the fixing seat, the inner surface of the bottom plate is provided with first convex rings projecting and extending towards the impeller on the outer periphery of the first air inlet openings, the arc-shaped outer side edges of the first air inlet openings are coincident with the inner walls of the first convex rings, chamfered surfaces are formed on the outer surface at the edge of each first air inlet opening, and the chambered surfaces are inclined to face one side of the outer surface and have arc-shaped cross sections.

The invention discloses a novel heat exchanger core, and belongs to the technical field of mechanical design. The novel heat exchanger core comprises etching plates, forming plates and partition plates; heat exchange runners are etched on the etching plates, and each heat exchange runner is composed of a direct runner and an oval runner which are alternatively arranged; the direct runners and the oval runners are communicated; the long axes of the oval runners and the central axes, in the liquid flowing direction, of the direct runners are located on the same straight line; the n etching plates and the m forming plates are alternatively arranged, wherein n is larger than or equal to 1, m is larger than or equal to 1, and m and n are both positive integers; the position between the etching faces of adjacent etching plates and the forming plates, the position between the two adjacent forming plates and the position between the etching faces of the two adjacent etching plates are each provided with one partition plate; according to the heat exchanger core, the characteristics of a micro-channel heat exchanger and a plate type heat exchanger are integrated, the use condition that the working medium cleaning degree is not high is met, and the novel heat exchanger core can be particularly suitable for the cooling working procedure of natural gas of an offshore work platform.

The invention provides an indoor unit for an air conditioner. The indoor unit comprises a shell, a movement structure, a blower structure and a baffle structure, wherein a return air opening, a lateral air opening and a lower air opening are formed in the shell, the lateral air opening and the lower air opening are communicated with the return air opening; the movement structure is movably arranged in the shell; the movement structure is provided with the blower structure, the movement structure can drive the blower structure to move, and the blower structure is located at a first position ora second position; the baffle structure is arranged in the shell and located between the lateral air opening and the lower air opening, and the baffle structure is used for dividing the shell, so thatair flow from the blower structure passes through the lateral air opening or the lower air opening to be sent out. In this way, the refrigeration air flow and the heating air flow are sent out from different air outlets, and the using comfort is ensured. Moreover, the lateral air opening and the lower air opening can be separated by the baffle structure so that the air flow at the lateral air opening is prevented from being mixed with the air flow at the lower air opening, the air outlet amount is ensured, and then the using performance of the indoor unit of the air conditioner is ensured.

The invention relates to a hexagonal airflow plate for an intelligent fresh air system, a machining method of the hexagonal airflow plate and a heat exchange core, and belongs to the technical field of intelligent fresh air systems. A hexagonal airflow plate for an intelligent fresh air system comprises a hexagonal outer frame and division bars in the outer frame, and is characterized in that the division bars are straight-bar-shaped and comprise guide division bars and ventilation division bars; the outer frame comprises two parallel edges and corner edges on the two sides of the parallel edges, the number of the corner edges is four, every two corner edges form a group, each group of corner edges form a right angle, air holes are formed in one group of opposite corner edges, and the other group of opposite corner edges are of closed structures; the guide division bar is of a closed structure, air channels are formed in the two sides of the guide division bar, and every two adjacent air channels are not communicated. The ventilation division bar and the guide division bar are arranged in an intersection mode at an included angle, and ventilation holes are formed in the ventilation division bar. Meanwhile, the invention provides a processing method of the hexagonal airflow plate and a core body manufactured by using the hexagonal airflow plate.

The invention provides a shock absorber, and belongs to the technical field of machines. According to the shock absorber, the problems of insufficient self adaptability of an existing shock absorber and the like are solved. The shock absorber comprises a working cylinder, a movable piston rod is arranged in the working cylinder, a piston assembly is fixedly connected to the piston rod, the inner cavity of the working cylinder is divided into a top cavity and a bottom cavity by the piston assembly, an inserting hole is formed in the bottom end surface of the piston rod, a flow passing channel communicating the top cavity with the bottom cavity is formed in the piston assembly, a flow restriction hole communicating with the flow passing channel is formed in the hole wall surface of the inserting hole, a valve rod which can be inserted into and pulled out of the inserting hole is fixed to the bottom of the working cylinder, when the valve rod is inserted into the inserting hole, the outerside surface of the valve rod is in fit with the hole wall of the inserting hole in a matched mode, and the valve rod can block the flow restriction hole, and a reflux channel which is used for communicating the inserting hole with the bottom cavity when the valve rod is inserted into the inserting hole is formed in the valve rod. According to the shock absorber, the self adaptability is improved, and working is stable.

The invention discloses a water washing and acid washing dual-purpose tank with a built-in pneumatic guiding fastening piece. The water washing and acid washing dual-purpose tank comprises a washing tank which is internally provided with a liquid storing cavity and a conveying mechanism. The two ends of the washing tank are provided with openings which are used for supplying the conveying mechanism to penetrate through, the upper portion of the washing tank is provided with a water inlet which communicates with the liquid storing cavity, and the lower portion of the washing tank is provided with a water leaking hole groove which communicates with the liquid storing cavity. Two spiral rolling frames opposite to each other are arranged in the washing tank, a baffle is arranged between the two spiral rolling frames, and a through hole for supplying the conveying mechanism to penetrate through is formed in the middle of the baffle. One ends of the spiral rolling frames are provided with annular rolling frame supports, and a plurality of pneumatic blades are arranged on the circumferential side of each annular rolling frame support at equal intervals. Pneumatic cavities are formed among the adjacent pneumatic blades and the annular rolling frame supports and the washing tank, and an air inlet and an air outlet which communicate with the pneumatic cavities are formed in the washing tank. The conveying mechanism comprises a plurality of blade type leaking frames which are hinged to be in an annular shape, a pneumatic motor drives the blade type leaking frames to penetrate through the middle portion of the washing tank, and baffles are mounted on the blade type leaking frames at equal intervals.

The invention discloses an air-cooled structure of a power generation set. The air-cooled structure comprises a power generation unit which is formed by an engine and a power generator; the front end of the engine serves as a first cold air inlet; a motor shaft of the power generator is connected with an output shaft of the engine; the rear end of the power generator serves as a second cold air inlet; a wind collection volute casing is arranged between the rear end of the engine and the front end of the power generator; a spiral cooling air duct is formed in the wind collection volute casing; the motor shaft which is arranged in the wind collection volute casing is provided with a cooling fan; the top of the engine is provided with a wind collection cover; an exhaust pipe of the engine extends from the wind collection cover to be located above the power generator; a noise reduction cooling cover which is connected with the wind collection cover is arranged outside the exhaust pipe; an air outlet of the wind collection volute casing is communicated with the noise reduction cooling cover. According to the air-cooled structure of the power generation set, the cooling effect is good and accordingly the stability of the work of the power generation set is ensured and the amplitude of the power reduction due to the temperature rise is small.

The invention provides a novel heat exchanger core. The novel heat exchanger core comprises a cover plate, a first heat exchange plate set, a second heat exchange plate set, ..., and a nth heat exchange plate set. The heat exchange plate sets are stacked, the cover plate is stacked on the outer side of the heat exchange plate sets, and each heat exchange plate set comprises more than one same heat exchange plate; each heat exchange plate is composed of a base body and a heat exchange flow passage processed in the base body in a chemical-etching mode, and the projection of flow inlets and flow outlets of different heat exchange plate sets in the direction perpendicular to the heat exchange plates is not overlapped with each other; each heat exchange flow passage is composed of straight flow passage bodies and oval flow passage bodies which are alternately arranged; the straight flow passage bodies are communicated with the oval flow passage bodies; the long axes of the oval flow passage bodies and the center axes of the straight flow passage bodies in the liquid flowing direction are located on the same straight lines; n is a positive integer larger than or equal to three. According to the novel heat exchanger core, the narrowing and widening flow passages are adopted, the flow passages are prevented from being blocked, and the novel heat exchanger core is particularly suitable for the working procedure of cooling natural gas on a sea working platform.

The invention provides an air conditioner. The air conditioner comprises an air outlet grid, the air outlet grid comprises multiple annular grids which are coaxially arranged, and the annular grids are connected through multiple radial grid bars which are arranged in the radial direction of the annular grids. The radial grid bars comprise flow guide sections used for guiding airflow blown out of afan and flow adjusting sections used for adjusting the guided airflow to enable the airflow to flow out towards the position of the center of the fan, and the flow guide sections are connected with the flow adjusting sections. The annular grids comprise the first annular grids, and the heights of the first annular grids are gradually increased in the radial direction from the center of the fan tothe outer edge of the fan. According to the air conditioner, the air speed of air blown out by the fan of the air conditioner can be effectively increased, the divergence angle of the blown-out air can be reduced, the backflow amount of the blown-out air is greatly reduced, and the performance of the air conditioner is guaranteed.

The invention discloses a parahydrogen content detection device utilizing nuclear magnetic resonance, which comprises a parahydrogen inlet channel and a common hydrogen inlet channel which are both connected with the inlet end of a third one-way valve, and the outlet end of the third one-way valve is connected with one end of a sampling gas inlet pipe; the other end of the sampling gas inlet pipe penetrates through the sealing plug at the opening of the reaction sampling pipe and extends to the bottom of the reaction sampling pipe, porous material filler is loaded at the bottom of the sampling pipe, and one end of the sampling gas outlet pipe penetrates through the sealing plug at the opening of the reaction sampling pipe and extends to the top of the reaction sampling pipe; and the sampling air outlet pipe is connected with a third pressure gauge and a first back pressure valve, the other end of the first back pressure valve is in empty connection, the outlet end of the third one-way valve is connected with one end of a fifth straight-through valve, and the other end of the fifth straight-through valve is connected with a vacuum gauge and a vacuum pump. The invention also discloses a parahydrogen content detection method using nuclear magnetic resonance. The method is simple in structure, simple and convenient to control and operate, and capable of efficiently and accurately detecting the content of parahydrogen in parahydrogen-enriched gas.

The invention discloses a power generation set. The power generation set comprises a base, a cabinet body, a front lateral plate, a rear lateral plate, a power generation unit, a storage battery and a control system; the power generation unit comprises an engine and a power generator; a wind collection volute casing is arranged between the engine and the power generator; a spiral cooling air duct is formed in the wind collection volute casing; the top of the engine is provided with a wind collection cover; a noise reduction cooling cover which is connected with the wind collection cover is arranged outside an exhaust pipe of the engine; an air outlet of the wind collection volute casing is communicated with the noise reduction cooling cover; an exhaust end of the noise reduction cooling cover is connected with a muffler; the muffler is fixed in a casing; the casing is fixed in the cabinet body through a separating plate. According to the power generation set, the noise reduction effect is good, the cooling effect is good, and accordingly the stable work of the power generation set is ensured.

The invention discloses an implementation method for a channel type cold end heat exchanger of a gas coupling pulse tube refrigerator. The channel type cold end heat exchanger comprises a first heat exchanger outer shell, a second heat exchanger outer shell, a first conical slit body, a second conical slit body, a first through hole, a second through hole, a first laminar flow element, a second laminar flow element, a third laminar flow element, a first channel, a second channel and a plug, conical slits are cut in the left heat exchanger outer shell and the right heat exchanger outer shell respectively, and channels are formed in the heat exchangers, so that connection among a first-stage regenerator, a second-stage regenerator and a first-stage pulse tube is achieved. The channel type cold end heat exchanger of the gas coupling pulse tube refrigerator and the implementation method realize efficient matching of front-and-rear-stage cold fingers of the pulse tube refrigerator while maintaining the high-efficiency heat exchange advantage of a traditional heat exchanger, inhibit the backflow, mixed flow and turbulence disturbance of the gas working medium in the heat exchange channel, and ensure the uniformity of gas flow. According to the channel type cold end heat exchanger of the gas coupling pulse tube refrigerator and the implementation method, the heat exchange efficiency and the overall performance of the refrigerating machine are remarkably improved, and the channel type cold end heat exchanger has very positive significance in the aspect of achieving compactness and practicability of the multi-stage pulse tube refrigerating machine.

The invention discloses a multi-stage U-shaped gas coupling pulse tube refrigerator connecting tube type heat exchanger and an implementation method. A cold end heat exchanger comprises a heat exchanger shell, a connecting tube, a first conical slit body, a first through hole, a laminar flow element, a second conical slit body, and a second through hole. Conical slits are cut in the left and right sides of the heat exchanger shell, respectively, the two parts communicate through a welding connecting pipe, and meanwhile a first-stage regenerator, a second-stage regenerator and a first-stage pulse tube are connected. While the advantage of efficient heat exchange of a traditional heat exchanger is kept, efficient matching of a front-stage cold finger and a rear-stage cold finger of the pulse tube refrigerator is achieved, backflow, mixed flow and turbulent flow disturbance of a gas working medium in a heat exchange channel are restrained, and gas flowing uniformity is guaranteed. According to the invention, the heat exchange efficiency and the overall performance of the pulse tube refrigerator are remarkably improved, and the multi-stage pulse tube refrigerator has very positive significance in the aspects of achieving compactness and practicability of the multi-stage pulse tube refrigerator and obtaining extremely low temperature.

The invention discloses a loosing circle testing system and method based on a coupling effect of rock water in drill holes of soft rock. The loosing circle testing system comprises a hole sealing device, a grouting device, a water injection device, a testing device and a control device. The testing device comprises a telescopic rod body, a displayer, ultrasonic transmitters, ultrasonic receivers and a stand column used for supporting the telescopic rod body. The ultrasonic transmitters and the ultrasonic receivers are connected to the input end of the displayer through lines and connected to the control device through the output end of the displayer. Detecting rods are connected to the two ends of the telescopic rod body respectively. The heights of the two detecting rods are the same, and the two detecting rods are kept parallel. Each detecting rod is formed by sleeving a plurality of pipe bodies together. One ultrasonic transmitter and one ultrasonic receiver are installed on the head of each detecting rod respectively. The dynamic hole sealing device achieves synchronization of plugging cracks in the holes through grout and coupling of the rock water, and the problem that when top plate surrounding rock is tested, a large amount of water in the drill holes is lost in the testing process, and can not be supplemented in time is solved.