138results about How to "Good throttling effect" patented technology

A medicament dispensing device, a medicament magazine thereof, and a method of removing a medicament from the medicament magazine. The inhaler has a mouthpiece (9) and an air channel (4) connected thereto, as well as a medicament magazine with at least one medicament chamber containing a powdered medicament. A drive current is produced in the air channel, while a vacuum flow (5′) can be produced by the drive current and a constriction formed in the air channel. This narrowest part of the air channel that produces the vacuum flow is connected to a removal opening (2) which communicates with a control opening (3), in order to form an emptying current through the control opening via the removal opening. In a preferred embodiment the at least one medicament chamber including the control opening, the removal opening and a fill opening are housing in the one-piece medicament magazine.

The invention discloses a liquid lubricated end face seal structure with a cross-scale surface texture characteristic, which comprises a moving ring and a static ring of a mechanical seal; and one side of an end face of the moving ring/static ring is a high pressure side, namely an upstream, while the other side is a low pressure side, namely a downstream. The liquid lubricated end face seal structure is characterized in that: a plurality of cross-scale texture face grooves are processed on the end face of the moving ring or the static ring of the mechanical seal; each cross-scale texture face groove consists of a millimeter deep groove and micrometer micropores; the deep groove is positioned at the upstream of the end face; the micropores are distributed on the periphery of the deep groove; seal weirs are arranged between the cross-scale texture face grooves; and a downstream of each cross-scale texture face groove is provided with an annular seal dam of a non-opened face groove. The liquid lubricated end face seal structure has the advantages of improving seal lubrication, improving the rigidity of a fluid film and the pressure and heat resistance of the mechanical seal, greatly strengthening the operational reliability, stability and leak tightness of the seal, and prolonging the service life of the seal.

The invention discloses a method for preparing a positively charged polyvinyl chloride (PVC) hollow fiber nanofiltration membrane. The positively charged PVC hollow fiber nanofiltration membrane has a two-layer structure consisting of a positively charged compact skin layer and an electrically neutral porous support layer; the pore diameter of micropores of the compact skin layer is 1-5nm, and the pore diameter of micropores of the porous support layer is 10-100nm; and the outer diameter of the membrane is 1.5-3.0mm, and the inner diameter of the membrane is 0.5-2mm, wherein the positively charged compact skin layer comprises main components of polyvinyl chloride and cationic copolymer; and the electrically neutral porous support layer comprises main components of polyvinyl chloride and an inorganic filler. The method for preparing the positively charged PVC hollow fiber nanofiltration membrane comprises the following steps of: co-extruding positively charged compact skin layer membrane preparing liquid and electrically neutral porous support layer membrane preparing liquid in a two-layer ring shape; and curing and forming hollow fibers by using a dry-wet spinning process. The prepared hollow fiber nanofiltration membrane has the advantages of easily controlled interception property, high strength, simple preparation process and the like, and is a high-performance, low-cost and long-life nanofiltration membrane material for water treatment.

A magnetic liquid sealing device with pole shoes being provided with high teeth and low teeth. Positioning rings (5), left bearings (6), left magnetic separation rings (7), magnetic liquid sealing assemblies, right magnetic separation rings (13) and right bearings (14) are sequentially arrayed in outer covers (1). After magnetic liquid (17) is injected into inner rings of magnets (10), shaft sleeves (3) are arranged in inner holes of the above parts, then screws (20) are used for fixing end covers (18) on the outer covers (1), the outer circles of the right bearings (14) are compressed, and the end covers (18) and the shaft sleeves (3) are connected by screws (19). The characteristic that pole teeth are arranged on a common magnetic liquid sealing upper pole shoe is utilized, and pole teeth which are originally arranged on a magnetic liquid seal are replaced by high teeth in a labyrinth seal. The magnetic liquid sealing device with the pole shoes being provided with the high teeth and the low teeth is simple in structure, the impact resistance of the magnetic liquid seal is improved, and the magnetic liquid seal is made to be used in certain the severe proof pressure environments where pressure can be increased suddenly and sharply.

The invention provides a heat reclamation module unit, which comprises a compressor, a first four-way valve, a second four-way valve, an air-conditioning water shell-tube heat exchanger, a first throttling device, a second throttling device, a third throttling device, a first heat exchanger, a hot water shell-tube heat exchanger, an air-liquid separator, a liquid storage tank and a connecting pipe; the D end of the first four-way valve is connected with the exhaust end of the compressor; the E end of the first four-way valve is connected with the output end of the air-conditioning water shell-tube heat exchanger; the S end of the first four-way valve is connected with the input end of the air-liquid separator; the C end of the first four-way valve is connected with the D end of the second four-way valve; the C end of the second four-way valve is connected with the input end of the first heat exchanger; the E end of the second four-way valve is connected with the output end of the hot water shell-tube heat exchanger; and the S end of the second four-way valve is connected with the input end of the air-liquid separator.

The invention particularly relates to an air conditioner defrosting device, an air conditioner defrosting control method and a system and an air conditioner. Multiple parallel outdoor heat exchangers are provided; one or more outdoor heat exchangers can be selected for heating according to application environments of the air conditioner and user demands; when the outdoor heat exchangers need to defrost, the outdoor heat exchangers are defrosted by a hot air bypassing mode, and the other outdoor heat exchangers without needing defrosting are adopted to continuously heat, so that the indoor continuous heating in the defrosting process is realized, and the indoor comfort is prominently improved; and meanwhile, low-temperature gas after defrosting cooling in a bypass pipeline dose not directly enter a gas return port of a compressor, but enters a refrigerant circulating loop after being throttled by an electronic throttling part, so that the great change of the intake/exhaust pressure of the compressor cannot be caused, and the operation reliability of the compressor is improved.

The invention discloses a hydrostatic nut pair with an internal variable throttling function and relates to the field of precision machinery automation equipment. The hydrostatic nut pair with the internal variable throttling function comprises a lead screw and a nut which are mutually matched, wherein a first oil cavity and a second oil cavity are formed in the two sides of each inner thread tooth surface of the nut, and the radial section projections of both the first oil cavity and the second oil cavity are fan trapezoids; through the corresponding first oil cavity and second oil cavity, a hydrostatic oil film of lubricating oil can be formed between the lead screw and each tooth side surface of the nut; a groove used for communicating with the corresponding first oil cavity and the corresponding second oil cavity is formed in each internal thread tooth of the outer circle of the nut; a movable throttling part is mounted in each groove, and comprises a slide valve, a first elastic component and a second elastic component; an oil supply groove communicating with each groove is formed in the outer circle of the nut; an external sleeve is mounted on the outer circle of the nut in a matched manner; and an oil supply hole communicating with the oil supply groove is formed in the external sleeve. By adoption of the hydrostatic nut pair provided by the invention, not only can an oil supply pipeline be simplified, but also the throttling performance can be improved.

The invention provides a motor cooling structure, an air conditioner, and a motor cooling method. The motor cooling structure includes a motor, a refrigerant pipe, a control valve, a first temperature sensor, a second temperature sensor, and a controller, the refrigerant pipe is arranged on the motor, the first end of the refrigerant pipe is connected with an outlet main pipeline of a condenser of the air conditioner, the second end of the refrigerant pipe is connected with a gas-liquid separator of the air conditioner, the control valve controls the opening and closing of the refrigerant pipe, when the refrigerant pipe is opened, refrigerant of the air conditioner enters into the refrigerant pipe via the first end through the outlet main pipeline and flows into the gas-liquid separator via the second end after passing through the motor, the first temperature sensor detects the outlet pipe temperature of a cooling branch, the second temperature sensor detects the outlet pipe temperature of a four-way valve, and the controller adjusts the opening degree of the control valve based on the difference of the outlet pipe temperature of the cooling branch and the outlet pipe temperature of the four-way valve. According to the invention, the motor cooling effect of the air conditioner is improved, and the energy efficiency of the motor can be maximally performed based on the normal operation of the air conditioner.

The present invention relates to a cooling system which is used for an internal combustion engine and consists of a first cooling circulation comprising a component cooler, an environment heat exchanger and a pump (18) and a second cooling circulation comprising a component cooler and a pump (24), wherein the cooling circulations are integratedly configured in at least one section and coolant configured to be conveyed by the pumps (18, 24) is arranged in the cooling circulations, and the cooling system is characterized in that the pumps are adjustably configured and adjustment of volume flow of the coolant flowing through the component coolers can be realized through cooperated operation of the pumps (18, 24).

The invention relates to a gas well scaling simulation device and simulation method. The gas well scaling simulation device comprises a gas storage device used for providing simulative gas, a liquid storage device used for providing simulative liquid, a gas-liquid mixer used for mixing the simulative gas and the simulative liquid to obtain experimental fluid and scaling simulation pipes; at least two scaling simulation pipes are sequentially connected in series to simulate a gas well; a throttling structure is arranged on any two corresponding adjacent scaling simulation pipes; the two corresponding adjacent scaling simulation pipes are in communication through a throttling channel to simulate the change that the pressure of gas well fluid is gradually reduced in the flowing direction of the gas well fluid; and each scaling simulation pipe is provided with a heating device used for adjusting the temperature of the scaling simulation pipe so as to simulate the change that the corresponding formation temperature is gradually reduced in the flowing direction of the gas well fluid. According to the technical scheme, the influence of the fluid pressure change in the gas well and the formation temperature change on gas well scaling is considered, and the environment in the whole gas well can be simulated from the overall macroscopic aspect.

The invention relates to a heat pump water heater system. The system includes a compressor, a condenser, a throttling device and an evaporator. The compressor is sequentially connected to the condenser, the throttling device, and the evaporator and returns to the compressor. It also includes a high-pressure storage liquid device, auxiliary throttling device, after the high-pressure liquid reservoir and auxiliary throttling device are connected in series, they are connected in parallel at both ends of the throttling device to perform double throttling control. Compared with the prior art, the invention has the advantages of wide throttling range, good throttling effect and the like.

The invention relates to an air valve seating control device for a hydraulic drive air valve mechanism of an engine, which mainly comprises a hydraulic piston, a hydraulic oil channel, a one-way valve, a hydraulic piston cavity, a variable throttling channel and the like. The hydraulic piston cavity is provided with a main oil channel of the variable throttling channel and a bypass oil channel with the one-way valve and is communicated with a hydraulic system; and the hydraulic piston is used for driving an air valve to move. The air valve seating control device adopts the one-way valve to lead the hydraulic drive air valve mechanism to have different hydraulic circulation areas in the opening and closing process of the air valve; with the adoption of the variable throttling channel, the throttling circulation areas can be changed along with the air valve lift in the closing process of the air valve, and the air valve seating speed of the hydraulic drive air valve mechanism of the engine is furthermore controlled to realize the soft landing of the air valve.

The invention discloses a fixed-frequency air-conditioner, a control method of the fixed-frequency air-conditioner, a control device of the fixed-frequency air-conditioner and a computer readable storage medium. The fixed-frequency air-conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, an outdoor temperature sensor arranged on the outdoor heat exchanger, a four-way valve, acompressor, a first electromagnetic valve, a first throttling part, a second electromagnetic valve and a second throttling part, wherein the first electromagnetic valve and the first throttling partare mutually connected in series, and the second electromagnetic valve and the second throttling part are mutually connected in series. The length of a capillary pipe in the first throttling part is smaller than that of a capillary pipe in the second throttling part, a first refrigerant circulating loop and a second refrigerant circulating loop are formed, the first electromagnetic valve is used for controlling the first refrigerant circulating loop to be opened and closed, and the second electromagnetic valve is used for controlling the second refrigerant circulating loop to be opened and closed. The fixed-frequency air-conditioner solves the technical problem that an existing fixed-frequency air-conditioner provided with a single throttling assembly according to the rated working condition is low in energy efficiency under the working condition of low-temperature refrigerating or low-temperature heating.

The invention discloses a bridge type concentric constant pressure water distributor. The bridge type concentric constant pressure water distributor comprises an upper joint, a positioning platform, aconcentric adjusting sleeve, an outer protective casing, an adjusting mechanism, a main structure and a lower joint. The outer protective casing is connected to one end of the upper joint, the main structure is connected to the other end of the outer protective casing, and the lower joint is connected to the other end of the main structure. One end of the positioning platform is installed insidethe upper joint in a sleeved mode, and the main structure is connected to the other end of the positioning platform. One end of the concentric adjusting sleeve is installed inside the positioning platform in a sleeved mode, and the main structure is connected to the other end of the concentric adjusting sleeve. The upper joint, the positioning platform, the concentric adjusting sleeve, the outer protective casing, the main structure and the lower joint are centrally penetrated and coaxially arranged, the adjusting mechanism is installed and pressed tightly between the main structure and the outer protective casing in a sleeved mode, and the concentric adjusting sleeve meshes with one end of the adjusting mechanism. The design combining electric direct adjustment of downhole flow and a constant pressure control technology is adopted in the bridge type concentric constant pressure water distributor, the flow control effect is improved, and the voltage stabilization and constant voltage control are realized.