79results about How to "Inhale evenly" patented technology

The invention discloses a novel interstage air supplementing device of a multi-stage compression centrifugal type refrigeration compressor. The air supplementing device is characterized in that a second-stage exhaust volute (19) is arranged in a casing (1); a first-stage suction guiding ring (11), a first-stage impeller (5), a second-stage impeller (10) and an impeller distance ring (8) are arranged on a transmission shaft (9); a second-stage suction passage (15) is arranged in an interstage baffle (3); a first-stage exhaust passage (14) is formed between a first-stage diffuser (2) and the interstage baffle (3) in the casing (1); a second-stage exhaust passage (17) is formed between the interstage baffle (3) and the second-stage impeller (10); the casing (1), the first-stage diffuser (2) and the interstage baffle (3) commonly form an air supplementing and supplying passage (20); a straight slot section (18) is formed between the first-stage diffuser (2) and the interstage baffle (3); and an inter-stage sealing ring (7), a first-stage wheel cover sealing (4) and a second-stage wheel cover sealing (6) are arranged. By the device, the interstage air can uniformly enter a reflux apparatus of the compressor; the efficiency of the compressor is improved; and the airflow noise of the compressor is reduced.

This invention discloses a air supplying and discharging pipeline, especially an evenly absorbing and discharging pipeline that is adequate for long distance air supplying and discharging pipeline. It includes a simple and convenient ventilation flow equalizer, which is composed of several air ports arranged on the ventilation pipeline. The projecting area of the air port windward sections on air supplying pipeline section are increased or decreased successively. The flow rate and pressure of air port can be adjusted according to the position of air port, in order to realize evenly discharging or absorbing of the air supplying pipeline. This invention is easy to assemble too.

The invention relates to a loading method of a metallocene catalyst. In different stages of catalyst preparation in a closed reaction system, a certain negative pressure is formed in the system, namely: 1) the relative vacuum degree of the inorganic carrier pretreatment step system is ( -0.1)~(-0.075)MPa; 2) The relative vacuum of the system is (-0.065)~(-0.075)MPa when aluminoxane is added to the inorganic carrier; 3) Aluminoxane and metallocene compounds are added to the inorganic carrier After the system returns to normal pressure, each component can enter the pores of the inorganic carrier uniformly and quickly, the loading effect of the catalyst and the polymerization activity are greatly improved, and the polymer morphology is obviously improved. This method is simple and easy to implement, and can greatly improve the The preparation time of the metallocene catalyst is shortened, and the preparation efficiency of the supported catalyst is improved.

The invention discloses a micro-abrasive material water-jet cutting head apparatus, and relates to the field of mechanical processing equipment, particularly to a micro-abrasive material water-jet cutting head apparatus, which comprises a material storage tank, a mixing chamber and a spraying head, wherein a piston is arranged in the material storage tank, the material storage tank is divided into a compressed air cavity and a slurry abrasive material cavity through the piston, the lower end of the material storage tank is connected with a material feeding soft pipe, the material feeding soft pipe is connected with the mixing chamber through a screw pump shell, a material feeding screw connected with a stepper motor is arranged in the screw pump shell, the mixing chamber is arranged in the spraying head, the upper end of the spraying head is provided with a high pressure water chamber, the lower end of the high pressure water chamber is connected with the mixing chamber through a water spraying nozzle, and the lower end of the mixing chamber is provided with a mixed material spraying pipe. According to the present invention, the screw is adopted to perform the active material feeding, such that the material feeding reliability is high, the suction is uniform, the material feeding flow can be controlled, and the abrasive material conveying system failure caused by directly entering of the high temperature water into the abrasive material tank after the clogging of the spraying head can be prevented.

The invention discloses a self-cleaning fluidized bed biofiltration device for aquaculture. The self-cleaning fluidized bed biofiltration device comprises a barrel, wherein the barrel is internally provided with a bed expansion region and a suspended matter sedimentation region; the bed expansion region is filled with a filter material; a self-cleaning assembly and an automatic detecting assembly are arranged above the bed expansion region; the self-cleaning assembly is used for cleaning suspended matters on the surface of the filter material, and the cleaned filter material enters the bed expansion region again; and the automatic detecting assembly is used for controlling the self-cleaning assembly. The suspended matter sedimentation region is located above the self-cleaning assembly, and the suspended matters separated from the self-cleaning assembly reach the suspended matter sedimentation region after passing through the bed expansion region and are discharged after being settled.

The invention discloses a device for treating household garbage. The device comprises an outer shell, an inner shell, a box, a first connecting pipe, a first baffle plate, a first moving piece, a second moving piece, a second baffle plate, a forward magnetostrictive film, a reverse magnetostrictive film, a coil, a first one-way film, a second one-way film and multiple cooling pipes; the inner shell is positioned on the inner side of the outer shell; a combustion cavity is formed in the inner shell; a feeding port is formed in the top wall of the inner shell; a first exhaust hole is formed in the side wall of the inner shell; the feeding port and the first exhaust hole are both communicated with the combustion cavity; the box is positioned on the outer side of the outer shell; an accommodating cavity is formed in the box; an intake hole and a second exhaust hole are formed in the side wall of the box; a first end of the first connecting pipe is connected with the first exhaust hole, and a second end of the first connecting pipe is connected with the intake hole; the first baffle plate is positioned in the accommodating cavity for dividing the accommodating cavity into a first abdominal cavity and a second abdominal cavity; and an exhaust hole is formed in the first baffle plate. The device is excellent in garbage treatment effect.

The invention provides a trailing suction device for a dredger. The trailing suction device for the dredger comprises a trailing casing which is defined by side plates and a rear cover which is arranged at the rear end; the silt inlet is reserved at the front end of the trailing casing; the silt outlet is formed under the rear end of the trailing casing and connected with a silt discharging pipe; a plurality of vertical partition plates are arranged in the trailing casing; the outer side of the trailing casing is provided with a water supply pipe which is connected with a high-pressure water gun; the water supply pipe is connected with a plurality of water distributive pipes; the ends of the water distributive pipes are located under the trailing casing. The inner side of the trailing casing is provided with the partition plates and accordingly the strength of the trailing casing is improved, silt can enter into between the adjacent partition plates, and accordingly the silt sucked into the inner chamber of the trailing casing can be uniform to the greatest extent. The water supply pipe is connected with a high pressure water supply device arranged on the ship through a pipeline, a water source of the water supply device is the sea water or the river water and the like from the operational area, the high pressure water can be ejected out of the water distributive pipes during water supply, the silt deposited at the trailing suction position can be smashed due to the fact that the distributive pipes are connected with the trailing suction device, and the silt can be mixed with the water to form loose mud which can be sucked into a mud pump conveniently.

The invention discloses a compressor and a refrigeration system provided with the compressor. The compressor comprises a shell, a crankshaft, a first air cylinder, a second air cylinder, a central partition plate, a first flange, a second flange, a first cover plate and a second cover plate, wherein the crankshaft, the first air cylinder and the second air cylinder are arranged inside the shell, the central partition plate is arranged between the first air cylinder and the second air cylinder; partition plate air inlet grooves which are respectively communicated with the first air cylinder and the second air cylinder are formed in the two lateral sides of the central partition plate and communicated with each other through a through hole which penetrates through the central partition plate; the first flange is connected with the first air cylinder; the second flange is connected with the second air cylinder; the first cover plate is arranged on the first flange; the second cover plate is arranged on the second plate; a first sliding sheet groove is formed in the first air cylinder to contain a first sliding sheet; a second sliding sheet groove is formed in the second air cylinder to contain a second sliding sheet; a spring is arranged at the tail part of the first sliding sheet and a pin nail used for locking the second sliding sheet is arranged at one side of the second sliding sheet. According to the compressor, the shift of air suction is avoided and the stability of air suction of the compressor is guaranteed.

A gas-liquid separator suitable for an air conditioning system with a plurality of parallel compressors relates to the gas-liquid separator in the air conditioning technical field. The gas-liquid separator comprises a shell, and a refrigerant feed tube and an air suction tube which are connected with the upper end of the shell. The structural feature of the gas-liquid separator is as follows: the refrigerant feed tube is a manifold communicated with the inner cavity of the shell, the air suction tube comprises a plurality of U-shaped tubes which are arranged at the bottom of the inner cavity of the shell, and the lower U-shaped section of each air suction tube is provided with a plurality of oil absorption holes. Compared with the prior art, the gas-liquid separator can smoothly take lubricating oil deposited in the pipeline of the system back into compressors to cause uniform oil return of each compressor and equalize suction pressure and suction amount of all compressors.

The invention provides a multi-cylinder double-level enthalpy-increasing compressor which comprises a lower cover plate (10), a lower flange (9), an upper partition plate (4), a middle partition plate (5) and at least one middle cavity volume formed between every two of the lower cover plate (10), the lower flange (9), the upper partition plate (4) and the middle partition plate (5). The total middle cavity volume is the sum of all the middle cavity volumes; the specific value of the product of the total middle cavity volume or one of the middle cavity volumes in the total middle cavity volume and the volume ratio to the displacement square of a second-level cylinder is within a specified specific value range; and the air suction volume ratio is the ratio of the second-level air suction amount to the first-level air suction amount. According to the multi-cylinder double-level enthalpy-increasing compressor, the reasonable middle cavity volumes can be designed so that air suction of the second-level cylinder can be stable in a double-cylinder mode or a three-cylinder mode, a first-level cylinder can exhaust smoothly, the technical problem that the pressure of a refrigerant in the air cylinders of the double-level compressor fluctuates greatly can be effectively relieved, and therefore the operation performance of the compressor can be smooth, and noise of the compressor can be lowered. The invention further relates to an air conditioner or a heat pump water heater with the compressor and a control method.

The invention discloses an air suction / exhaust method and structure of a V-shaped box facial tissue folding machine. The two ends of each tissue folding roller with a cutter on the roller surface are provided with air suction control ports in mutual communication respectively; air suction is performed at the air suction control ports at the two ends at the same time to form a negative pressure and absorb the facial tissue; and thus the processes of tissue feeding, cutting and folding are realized on the same tissue folding roller. The structure disclosed by the invention comprises two parallel tissue folding rollers and two cutter shafts; the roller surface of each tissue folding roller is axially provided with a cutter corresponding to the cutter shaft; each side of each tissue folding roller is provided with a tissue feeding air suction control port, a tissue folding air suction port and a corresponding air valve; the tissue feeding air suction control port and the tissue folding air suction control port are mutually communicated through an air suction channel; and air suction holes are correspondingly communicated with the corresponding air suction channel to form a structure realizing respective and synchronous air suction of the tissue feeding air suction control port and the tissue folding air suction control port on the two sides of the tissue folding roller. The invention has the advantages of high efficiency, high tissue folding precision, low energy consumption and low production and operation cost.

The invention discloses an undressing-free automatic dejecta cleaner comprising a full-automatic processor and a toilet bowl. The toilet bowl is provided with a dejecta collecting area, a dejecta drain hole, a hot water input pipe and a hot air input pipe; the full-automatic processor comprises a shell body, a drainage bucket, a negative pressure device, a hot water device, a hot air device and acontrol device and is also provided with a packaging device which is connected with the drainage bucket and can seal and package dejecta and sewage; the toilet bowl is self-adaptive underwear made from a flexible material; the dejecta collecting area is arranged at the crotch of the self-adaptive underwear and made from a flexible waterproof material; and the full-automatic processor is also provided with a positive pressure device which can inflate the underwear and strut the dejecta collecting area to form an excretion space. The toilet bowl provided by the invention can be worn on a user for a long time, and the user does not need others' help for excretion, sanitation after excretion is simple to process, and the invention has the advantages of no troubles in undressing, simplicity inuse, convenience, comfort, and the like.

The invention provides a making method of instant succulent frozen dried bean curd. The making method comprises the following steps that dried bean curd is aged after being frozen, and frozen dried bean curd is obtained; the frozen dried bean curd is unfrozen, and porous frozen dried bean curd is obtained after water is removed; the porous frozen dried bean curd is boiled in marinade, and the instant succulent frozen dried bean curd is obtained; the instant succulent frozen dried bean curd is subjected to high-temperature high-pressure sterilization. The dried bean curd is adopted as a raw material, and after the dried bean curd is frozen, aged, unfrozen, dewatered, marinated and subjected to high-temperature high-pressure sterilization to be tasty, the comprehensively and evenly tasty instant succulent frozen dried bean curd with compact holes is obtained. Compared with bean curd, the water content of the dried bean curd is reduced, high toughness is achieved, many small holes are formed after freezing and dewatering, a good structure foundation is provided for fast sauce absorption and flavor development of the frozen dried bean curd through the compact mesh structure, and therefore sauce can be fast and evenly absorbed into the holes of the frozen bean curd. During high-temperature high-pressure sterilization, the sauce absorbed in the holes of the frozen dried bean curd can further penetrate through the frozen dried bean curd, and therefore the taste is more even.

The invention discloses a process and an apparatus that separate solids from gas in a vessel using cyclones. The cyclones have centers located at different distances from a center of the vessel, but the inlets to the cyclones are located at the same distance from the center to balance the proportions of catalyst fines entering each cyclone.

The invention discloses a steam condensing device of a granulating slag pit as well as a gas collecting cover thereof and a using method thereof, and belongs to the field of blast furnace granulatingslag treatment. The steam condensing device of the granulating slag pit comprises a pit body and a gas collecting cover, wherein the gas collecting cover is driven by a drive mechanism, and can covera granulating slag slot of the pit body; a de-misting space is formed in the lower side of the gas collecting cover, and is provided with a gas inlet which communicates with the outside; a gas suctionhole of an induced draft fan communicates with the de-misting space, and is used for forming negative pressure in the de-misting space; and a de-mister is arranged in a gas-flow flowing direction inthe de-misting space. The steam condensing device of the granulating slag pit can atomize and absorb rising steam in the granulating slag pit to finally discharge relatively dried gas, so that the de-misting effect is achieved, the problem that mist, which is not beneficial for slag removal operation, is generated by high-temperature vapor in the granulating slag is solved, and environmental pollution is also effectively reduced. The method can be used for simply, quickly and efficiently absorbing vapor in the slag pit, so that high efficiency, stability and safety of slag treatment are guaranteed.

The invention provides an air blower, belonging to the technical field of air blowers and solving the problems of low concentricity rate, high noise and inconvenience in mounting of existing air blowers. The air blower comprises a shell, motor mounting seats, impellers and a motor, wherein the motor mounting seats, the impellers and the motor are arranged in the shell, the impellers are mounted on the motor mounting seats, the motor is mounted in the motor mounting seats and can drive the impellers to rotate, and a support shaft penetrates through the motor and is bridged on the shell; the impellers comprise inner steel rings and outer steel rings, two sides of the inner steel rings are uniformly wound with fan blades, one ends of the fan blades are fixedly connected with the inner steel rings, the other ends of the fan blades are fixedly connected with the outer steel rings, the inner steel rings are provided with motor grooves, the motor mounting seats are arranged in the motor grooves, and the center of the motor coincides with the centers of the impellers. The air blower has the advantages of small movement, high concentricity rate, convenience in machining and simplicity in detaching.

The invention discloses a furnace charge baking oven, and belongs to the field of metallurgy. The furnace charge baking oven solves the technical problems that in the prior art, the moisture discharge of the furnace charge baking oven is unsmooth, and the processing quality is influenced. The furnace charge baking oven comprises a furnace body, a furnace door, a heater and an exhaust fan, wherein the furnace body comprises an inner furnace body and an outer furnace body, the side surface of the outer furnace body is provided with an installing opening, the inner furnace body is loaded into the outer furnace body from the installing opening, an opening is formed in the side surface, at the same side as the installing opening, of the inner furnace body, the furnace door is used for sealing the opening, a ventilation gap is formed between the outer wall of the inner furnace body and the inner wall of the outer furnace body, air suction holes are formed in each side wall of the inner furnace body, and an air outlet pipe is arranged on the exhaust fan, and is communicated with the ventilation gap. The furnace charge baking oven is applied to the furnace charge baking.

The invention relates to a parallel compression refrigeration system. The air vent of every compressor is connected with the first flow path inlet of a plate heat exchanger through an oil-air separator, a condenser and a liquid accumulator sequentially; the first flow path inlet is connected with an evaporator and the second flow path inlet of the plate heat exchanger respectively through a main pipe and an auxiliary pipe; the main pipe is provided with a first throttle device, and the auxiliary pipe is provided with a second throttle device; the evaporator is connected with the air suction ports of a plurality of the compressor; the second flow path outlet of the plate heat exchanger is connected with the middle-stage air suction ports of the plurality of the compressors. After refrigerant passes through the first flow path of the plate heat exchanger, a branching unit branches and transmits the refrigerant into the second flow path of the plate heat exchanger for heat absorption of the first flow path, so that the supercooling degree of the refrigerant flowing in the first flow path in improved; meanwhile, the middle stages of the compressors return air, the refrigerating capacity and the energy efficiency ratio can be effectively improved. Stable operation and long service life are both achieved, and energy saving and environmental protection are obtained.

An integrated odor-resisting exhaust device for a squatting pan comprises a pan body, an air bellow, an exhaust fan, a front air pipe and a rear air pipe. An exhaust tank is arranged on an edge opening of the upper portion of an inner cavity of the pan body and is communicated with the inner cavity of the pan body through a strip-shaped clearance, and an air pipe joint is arranged at the upper end of the pan body and communicated with the exhaust tank through a cavity channel. The exhaust fan is arranged in the air bellow, and separates the interior of the air bellow into an air inlet cavity and an exhaust cavity. An air inlet is formed in the lower end of the air bellow, an exhaust opening is formed in the upper end of the air bellow, the air inlet is located in the air inlet cavity, and the exhaust opening is located in the exhaust cavity. One end of the front air pipe is communicated with the air inlet, and the other end of the front air pipe is communicated with the air pipe joint. One end of the rear air pipe is communicated with the exhaust opening, and the other end of the rear air pipe serves as an exhaust end. The exhaust fan is started when a person goes to the toilet, odors emitted by dirt in the pan body sequentially pass through the exhaust tank, the cavity channel and the front air pipe, enter the air bellow, and are finally exhausted to the outside through the rear air pipe. The exhaust height is lower than the nasal cavity of people, the exhaust path does not pass through the nose of people, and odors and peculiar smells generated in the toilet are effectively restrained.

This invention discloses a air supplying and discharging pipeline, especially an evenly absorbing and discharging pipeline that is adequate for long distance air supplying and discharging pipeline. It includes a simple and convenient ventilation flow equalizer, which is composed of several air ports arranged on the ventilation pipeline. The projecting area of the air port windward sections on air supplying pipeline section are increased or decreased successively. The flow rate and pressure of air port can be adjusted according to the position of air port, in order to realize evenly discharging or absorbing of the air supplying pipeline. This invention is easy to assemble too.

The invention relates to a high-handling-capacity low-temperature vacuum evaporator which comprises an evaporation tank, wherein the evaporation tank is provided with a steam outlet and a concentratedsolution outlet; a heat exchanger arranged in the evaporation tank; a heat source device, wherein the heat source device includes: compressor units and air inlet ports, the compressor unit comprisesa plurality of compressors which are arranged in parallel, each compressor is connected with the air inlet port and the heat exchanger, and the air inlet port is used for distributing a gaseous refrigerant into each compressor to form a heat exchange medium provided for the heat exchanger so as to heat the waste liquid in the evaporation tank and evaporate the waste liquid into water vapor; and the pressure reducing device is used for vacuumizing the evaporation tank. The high-handling-capacity low-temperature vacuum evaporator has the advantages that the treatment capacity can be greatly increased, and the high heat exchange efficiency and the high effluent quality can be realized at lower cost.

The invention relates to the technical field of preparation of diamond tools, in particular to a preparation process of a diamond tool. The preparation process of the diamond tool comprises the following steps of A, mixing a water-soluble polymer bonding agent soluble in ethanol and a non-water-soluble polymer bonding agent soluble in ethanol to prepare a bonding agent composition completely soluble in ethanol and partially soluble in water; B, dissolving the bonding agent composition prepared in the step A through ethanol to prepare a bonding agent solution; and C, conducing dry-mixing on metal prealloyed powder and diamond particles to obtain a matrix alloy dry-mixed material. Through the preparation process of the diamond tool, provided by the invention, the compactness of the prepareddiamond tool is effectively improved; meanwhile, the diamond tool is good in mechanical performance and high in flexural strength; and the usability of the diamond tool is improved, and the service life of the diamond tool is prolonged.

The invention relates to the technical field of vocal music training and discloses a vocal music breathing training instrument. The vocal music breathing training instrument comprises a first air nozzle, a first cone cylinder, a second cone cylinder, a second air nozzle, a thermal resistance wire, a temperature sensor, a control box, a control switch and a reminding device; and the thermal resistance wire is arranged at the internal communicating position of the top of the first cone cylinder and the top of the second cone cylinder, the temperature sensor makes contact with the thermal resistance wire, the control box is internally provided with a controller module and a power source module, and the thermal resistance wire, the temperature sensor, the control switch and the reminding device are in electric signal connection with the controller module. According to the vocal music breathing training instrument, people can be reminded to control the exhaling speed or the inhaling speed,through repeated training, people can exhale and inhale controllably and stably, the structure is simple, and using is convenient.

The present invention provides a working vehicle which can increase the wind quantity on the condition of not increasing the wind speed of an external gas supplied to the devices, such as a radiator, etc. The working vehicle comprises the radiator 31 for cooling the cooling water of an engine 14; a first gas absorbing box 50 arranged at the outer side of the machine body of the enclosed radiator 31 to allow the gas to pass and block the dust to pass; a cooling fan 32 arranged at inner side of the machine body of the radiator 31 and for cooling the radiator 31 by rotatably driving the external gas absorbed by the first gas absorbing box 50. The working vehicle also comprises a second gas absorbing box 57 allowing the gas to pass and blocking the dust to pass and communicated with the internal space S of the first gas absorbing box 50. By the rotary driving of the cooling fan 32, the external gas is absorbed by the second gas absorbing box and flows in the internal space S.

The invention discloses a standardized and systematized process method for preparing jasmine Pu'er ripe tea. The method comprises the following steps of: A, preparation of Pu'er raw materials; B, jasmine flower preparation; C, comprehensive maintenance and strengthening treatment; D, splicing treatment; E, dissipating of flower heat, collecting of piles for continuous production, and flower lifting treatment; and F, drying treatment, sampling inspection and uniform stacking. The invention provides a standardized and systematized process method for preparing jasmine Pu'er ripe tea, which can organically integrate the mellowness of Pu'er tea and the faint scent of jasmine through a specific treatment process.

The invention relates to a water jetting air pumping device. The water jetting air pumping device comprises an upper connecting pipe, an upper absorption chamber, a middle throat pipe and a lower diffusion chamber which are coaxially arranged up and down and communicated with one another; the upper and lower ends of the upper connecting pipe are provided with an upper flange A and a lower flange A, and the upper end of the upper connecting pipe is provided with a water inlet; the upper absorption chamber comprises an outer cylinder body and an annular-shaped shunting sieve, wherein the annular-shaped shunting sieve coaxially sleeves the interior of the outer cylinder body, and the side wall of the outer cylinder body is provided with an air inlet; a plurality of shunting small holes are evenly distributed on the side wall of the annular-shaped shunting sieve, and a pair of shunting big holes which are arranged symmetrically are formed in the side wall of the annular-shaped shunting sieve. The water jetting air pumping device has the advantages that the structure of the water jetting air pumping device is simple, compared with the traditional water jetting air pumping device, the water jetting air pumping device is characterized in that a shunting type absorption camber structure is adopted, a shunting sieve is arranged in the upper absorption chamber, when the air is pumped, the air is evenly absorbed after shunting, the pumping efficiency is improved, and the air pumping is more stable.

The invention provides a heating and ventilation device capable of purifying air. The heating and ventilation device comprises a shell, a filter device, a motor, a driven wheel, a power device, an airblowing device, an air collecting bin, a heating bin, an air blowing bin, buffering devices, a protective housing and a heating device; the left side of the shell is fixedly connected with an air outlet housing; the filter device is movably connected to the right side of the shell; the motor is fixedly connected to the surface of the upper portion of the shell, and an output shaft of the motor isfixedly connected with a gearbox; a shaft of the driven wheel is rotationally connected to the rear wall of the shell, and the driven wheel is connected with an output shaft of the gearbox through atransmission belt; the power device comprises a pulling handle, a piston rod and a piston head, one end of the pulling handle is movably connected to one side of the surface of the power device, and the other end of the pulling handle is hinged to one end of the piston rod. It shows that, in order to achieve indoor heating, the interior of a room is heated through flowing air, and the effect of purifying peculiar smell and purities in the indoor air is well achieved.

The invention belongs to the technical field of cooling of polyester and nylon composite filaments, particularly relates to a suction cooling device for production of polyester and nylon composite filaments. The problems that an existing suction cooling device is poor in refrigeration effect and cannot perform dust collection and environmental protection on the composite filaments are solved. According to the following scheme, the suction cooling device comprises a refrigeration cabinet, and a box cover is rotationally mounted on the front surface of the refrigeration cabinet; a plurality of wire guide pipes are arranged in the refrigeration cabinet, a cooling box is arranged in the refrigeration cabinet, the wire guide pipes are all located in the cooling box, the cooling box is filled with heat preservation cotton, and the outer sides of the wire guide pipes are wrapped with the heat preservation cotton; and a plurality of air holes are formed in the outer sides of the wire guide pipes, the air holes are all located in the outer side of the cooling box, the top of the cooling box communicates with a refrigeration mechanism, the outer side of the refrigeration cabinet communicates with an air suction cylinder, and a propeller is rotationally installed in the air suction cylinder. The suction cooling device is convenient to operate, the refrigeration effect is improved, cooling is uniform, dust collection can be carried out on the composite filaments, and dust collection and environmental protection are carried out.

The invention provides an intermediate cooling medium flow passage of a compressor. The intermediate cooling medium flow passage is a pipeline with a gradually-changing cross section as a whole, wherein the inner wall of the intermediate cooling medium flow passage is smooth. The invention further provides a two-stage rotary compressor comprising the intermediate cooling medium flow passage with the smooth inner wall. According to the intermediate cooling medium flow passage and the compressor, the inner wall of the intermediate cooling medium flow passage is smooth, so that the intermediate flow path of a cooling medium is relatively reduced, the pressure loss is reduced, and thus the energy consumption of a high-pressure cylinder is reduced; meanwhile, the occurrence of pressure pulsation at ladders is avoided, and the air suction of the high-pressure cylinder is stable, so that the air suction pressure of the high-pressure cylinder is increased, the energy consumption of the high-pressure cylinder is reduced, and the performance of the compressor is improved.