69results about How to "Eliminate differential pressure" patented technology

In order to prevent, in an operation for circulating liquid, an ejection port from sucking air or the ejection port from pushing out liquid, the subtank for temporally storing ink to be supplied to the ink jet head includes the air communication passage opened or closed by the air communication valve. The ink jet head is communicated with the subtank by the first passage and the second passage to constitute one circulation passage. In order to circulate the ink in the subtank into the common liquid chamber, the main pump is energized while the air communication valve is being closed. When the circulation operation is stopped, the air communication valve is opened immediately after the stoppage of the main pump, thereby eliminating the differential pressure between the common liquid chamber and the subtank within a short period of time.

In order to prevent, in an operation for circulating liquid, an ejection port from sucking air or the ejection port from pushing out liquid, the subtank for temporally storing ink to be supplied to the ink jet head includes the air communication passage opened or closed by the air communication valve. The ink jet head is communicated with the subtank by the first passage and the second passage to constitute one circulation passage. In order to circulate the ink in the subtank into the common liquid chamber, the main pump is energized while the air communication valve is being closed. When the circulation operation is stopped, the air communication valve is opened immediately after the stoppage of the main pump, thereby eliminating the differential pressure between the common liquid chamber and the subtank within a short period of time.

A sewage treatment system for a breeding system able to guide sewage out of the breeding system to be purified and fed back to breeding ponds for reusing, it can be applied for one breeding pond or applied simultaneously for multiple breeding ponds, and it comprises: a purifying tank, at least a dirt discharging tube to lead sewage in the breeding ponds into a purifying tank; and at least a water take-in tube for feeding purified sewage from the purifying tank back to the breeding ponds. Wherein each dirt discharging tube has a dirt collecting portion; by multiple deposition and purification treatments on the sewage in the breeding ponds with the dirt discharging tubes and the purifying tank, the quality of water in the breeding system can be elevated, and environment pollution during breeding can be effectively reduced.

This invention relates to a heating / cooling system operating on the basis of a novel SPLIT BUFFER TANK; representing an efficiency improvement alternative to HVAC systems functioning with existing commercial buffer tanks. Currently, commercial buffers have the heat source provider (HSP)-return and system-return discharging to a common buffer / vessel. Novel SPLIT BUFFER is provided with a SEPARATION DISK placed inside the tank as mechanical way of separating the hot water inflow from the HSP from the warmer water inflow from system return. The disk moves up and down along the tank driven by demanded water supply and return. Pump-1 circulates hot water from the hot section of the buffer to the secondary system claiming for heat. Pump-2 circulates warmer water from the warmer section of the buffer through the HSP where it is reheated, and subsequently stored in the hot section of the buffer to reinitiate this cycle again.

The invention discloses a foaming composition for a water tank of a solar water heater, which is characterized by comprising the following main raw materials: a polyether foaming agent, sodium bicarbonate, chitosan and hollow glass beads. The improved polyether rigid foam composition can be used for reducing the phenomena that after being sprayed from a glossy jar and formed, a polyurethane material has high contractibility, the heat preservation effect of the water tank of the solar water heater is influenced and the water tank is deformed, bulged and barred, or even cracked.

A method of decreasing resonant frequency shifting of an electrical circuit mounted on a vehicle key includes providing a frame in an opening in the head portion of a vehicle key and locating the transponder in the frame. The frame comprises substantially rigid non-metallic material, and the frame includes a support structure for supporting the transponder while decreasing forces produced on the transponder by thermal expansion and contraction of the head portion of the key, thereby decreasing shift in the resonance of the electrical circuit of the transponder. The frame, the transponder and the head portion of the key are overmolded providing an outer covering that encloses and protects the transponder.

A door opening and closing apparatus includes: a frame that structures part of a wall surface of a transfer room and is provided with an opening for opening the transfer room; a door part capable of opening and closing the opening: a placing pedestal on which a storage container can be placed; a chamber provided at a position on the transfer room side so as to face the opening, and having an inner space to be subjected to a purge process with an environmental gas; and a pressure adjusting part causing the inner space of the chamber and the inner space of the storage container to communicate with each other using a route other than the opening. The door opening and closing apparatus can be applied to a wafer transfer apparatus or the like.

A check valve for pick-and-place applications includes a valve housing with a chamber, and a chamber shuttle with a cavity. The chamber shuttle is accessible from outside the chamber and adapted to receive a suction head. The chamber shuttle is adapted to travel within the chamber and establish “valve-open” and “valve-closed” states based upon the contact of the suction head upon the work piece surface. Blow off of the work piece surface is allowed by a fluid flow channel interposed between the suction head and the chamber shuttle cavity.

Multi-air condition system including a plurality of outdoor units, a pressure equalizing pipe connected such that refrigerant can flow among the outdoor units, for eliminating refrigerant pressure differences, and imbalance of an amount of refrigerant flow among the outdoor units, and control valves at portions of the pressure equalizing pipe connected to the outdoor units respectively, for cutting off introduction of the refrigerant to a relevant outdoor unit under the control of a controller.

A diaphragm pump comprising a pressure chamber arranged such that the volume of the pressure chamber is expanded and contracted by oscillation of a diaphragm (5), a suction-side check valve (7) for sucking air into the pressure chamber and a discharge-side check valve (8) for discharging air from the pressure chamber. The suction-side check valve is arranged to close by a valve body (17) being elastically deformed and brought into close contact with a valve seat, and open by the valve body elastically returning to the normal shape and coming out of contact with the valve seat. The discharge-side check valve is arranged to open by a valve body (18) being elastically deformed and producing a space relative to a valve seat, and close by the valve body elastically returning to the normal shape and coming into close contact with the valve seat.

This invention relates to a heating / cooling system operating on the basis of a novel SPLIT BUFFER TANK; representing an efficiency improvement alternative to HVAC systems functioning with existing commercial buffer tanks. Currently, commercial buffers have the heat source provider (HSP)-return and system-return discharging to a common buffer / vessel. Novel SPLIT BUFFER is provided with a SEPARATION DISK placed inside the tank as mechanical way of separating the hot water inflow from the HSP from the warmer water inflow from system return. The disk moves up and down along the tank driven by demanded water supply and return. Pump-1 circulates hot water from the hot section of the buffer to the secondary system claiming for heat. Pump-2 circulates warmer water from the warmer section of the buffer through the HSP where it is reheated, and subsequently stored in the hot section of the buffer to reinitiate this cycle again.

A flow path switching valve is provided, in which an impact due to the pressure change when a flow path is switched is prevented from being generated. (A) A rotor slot 1c allows an analysis infusion pump 11 to be connected to an analytical column 13, so as to form a flow path (condensing procedure). (B) The rotor of the flow path switching valve 1 is rotated clockwise for 30 degrees, the rotor slot 1c allows the analysis infusion pump 11, the analytical column 13, and a trap column 5 be connected. After the pressure in the trap column 5 is raised to the same pressure level as that of the analytical column 13, the pressure is stabilized, and the pressure difference between the two columns 5 and 13 is counteracted (high-pressure procedure). (C) After the pressure between the two columns 5 and 13 has been stabilized sufficiently, the rotor is further rotated for 30 degrees, and the trap column 5 and the analytical column 13 are connected in series, so the sample analysis can be performed (dissolution procedure and detection procedure).

The invention discloses an application circuit for enabling an electronic cigarette to implement forward and reverse connections. The application circuit comprises a power supply circuit arranged in acigarette rod and a control circuit arranged in a cartridge; power supply ends of the power supply circuit are coupled with receiving ends of the control circuit; an output end of the power supply circuit is electrically connected with a load in the cartridge; the power supply ends comprise a first power supply end and a second power supply end; the receiving ends comprise a first receiving end and a second receiving end which are correspondingly connected with the first power supply end and the second power supply end; both ends of the load are respectively connected with the first receivingend and the second receiving end; the control circuit comprises a cartridge chip; and identification circuits formed by diodes and controllable switching tubes are arranged at IO ends of the cartridge chip. The cartridge chip can identify anodes and cathodes of the power supply ends by the identification circuits so as to implement normal power-on of the cartridge, and thus, the cartridge and thecigarette rod can be randomly in forward and reverse connection for use.

The present invention relates to an isostatic press for high pressure treatment of a product having a temperature below 0° C., said isostatic press comprising a pressure chamber adapted to contain a first pressure medium, and a container which is placeable in the pressure chamber. The container which is placeable in the isostatic press is adapted to hold the product and a second pressure medium, the container being closable to keep the first pressure medium separated from fluid communication with the second pressure medium. The container is further provided with a pressure transfer device adapted to transfer pressure from the first pressure medium to the second pressure medium, and a body which is made of a material with low adiabatic heat emission relative to adjoining substances, so that the body from adjoining substances absorbs heat, which is generated by adiabatic temperature rise during the high pressure treatment. The invention also relates to a method, a container, and a plant for high pressure treatment of a product having a temperature below 0° C. by means of an isostatic press.

The invention discloses a surrounding and protecting structure with the outer surface provided with a resistance reducing device. The resistance reducing device comprises annular grooves which are formed in the outer surface of the surrounding and protecting structure in a surrounding manner in the circumferential direction. The sections of the annular groove are arc. A ridge-shaped annular rib isformed between the vertically-adjacent annular grooves. The annular rib comprises a rigid ridge back and an elastic cavity or solid elastic cavity or flexible cavity or solid flexible body below theridge back. The resistance reducing device comprises the annular rib. The resistance reducing device is arranged in at least part of the height range of the surrounding and protecting structure. An arc groove wall is used for conducting disordering guiding in the momentum direction of flow coming from the upward direction, and the resistance and amplitude in the following wind direction are reduced. The ridge back can be used for cutting the incoming flow sharply and dividing the incoming flow into the upper groove and the lower groove, generation of the bursting process of the turbulence boundary layer is inhibited, and resistance is reduced. The cavity below the ridge back is an elastic or flexible cavity or a solid elastic or flexible body, the cavity can deform under the effect of theincoming flow, energy of the incoming flow can be transferred and consumed towards the two sides, the pressure difference between the windward side and the lee side can be eliminated or reduced, and following wind direction resistance is reduced.

An oil separator capable of preventing breakage in a float with an extremely simple configuration is provided. An oil separator is to separate oil in a refrigerant that is discharged from a compressor and return the oil to the compressor. The oil separator includes: a tank, into which a refrigerant discharged from the compressor flows; a float having a hollow therein that is held vertically movably in the tank, the float moving up and down with a change of an oil level in the tank; and a needle valve to return oil in the tank to the compressor in accordance with up / down movement of the float. The float includes an equalizing tube having a lower end that opens at a bottom part in the float and an upper end that opens outside of the float and above the oil level in the tank.

A seal assembly, for use within a hot melt adhesive or other thermoplastic material dispensing valve assembly, comprises a sealing cartridge comprising a first primary seal, a secondary seal, and a viscous incompressible silicone grease disposed internally within the sealing cartridge. The viscous silicone grease effectively distributes the pressure forces such that internal pressure forces within the silicone grease are substantially equal to the external pressure forces of the hot melt adhesive whereby a pressure differential across the primary seal member is effectively eliminated thereby effectively eliminating the tendency for leakage of the hot melt adhesive or other thermoplastic materials.

A shower curtain with multiple V-shaped slits in the middle portion and fast drying mesh material making up the bottom portion. The slits allow air to go through the curtain, preventing the curtain from shifting. The lower part of the curtain that hangs in the tub is made of fast drying mesh to reduce the ability of mold to grow upon. The user therefore enjoys a cleaner shower experience because of the lack of body contact with the shower curtain and the reduction of mold growth on the shower curtain.

The present invention refers to a method of detecting the moisture in an apparatus for treating and preparing food, as well as to a method of treating and preparing food. In the method according to the invention, the current temperature values and speed values of the asynchronous motor driving a gas supply and circulation mechanism are compared to at least one characteristic line which is stored in a computer, and the current moisture in the gas mixture is determined from the deviation ΔN of the measured speed from the speed of the stored characteristic line. The present invention also comprises an apparatus for treating and preparing food that, in particular, serves to carry out the method of determining the moisture in a gas mixture.

A filter element comprises a filter medium (1) with an inflow and an outflow side wherein at least one channel (2) which is variable in its dimensions is associated to the filter medium (1). An arrangement comprises a filter element and a flow channel, wherein the flow channel can be at least partially closed and opened by means of the filter element. Such a filter element and such an arrangement solve the objective to realize a filter system which ensures an engine-friendly operation mode and a long service life of the filter element.

The present invention discloses a zoom lens assembly with capability of assuring concentricity of at least a lens group even during activity. The zoom lens assembly includes a plurality of optical lenses, at least two internal barrels, a lens holder and an alignment element wherein the lenses can be divided into at least two lens groups. The two internal barrels are used to respectively retain corresponding lens group therein to define a first and second lens sets. The lens holder is utilized to accommodate the first and second lens set therein. After twice alignment procedures in an assembled method, an internal barrel retained with one lens group is accommodated within the other internal barrel retained with another lens group to be precisely coupled. The two lens sets with mating structures are coupled to a guiding groove defined on the lens holder thereby the lens sets can slide inside the lens holder.

The invention relates to a differential pressure densimeter pressure protection device which comprises a corrugated pipe, a pressing cover, a spring and a corrugated pipe base. The corrugated pipe is arranged on the corrugated pipe base. The spring is connected to the outer portion of the pressing cover in a sleeved mode. A corrugated pipe inner cavity is arranged in the corrugated pipe. A channel which is communicated with the corrugated pipe inner cavity is arranged on the corrugated pipe base. The spring is pressed on the corrugated pipe through the pressing cover. The differential pressure densimeter pressure protection device is good in stability and can avoid waste.

The invention discloses a lifting valve device for dust collector, which comprises a lifting mechanism, a valve lifting rod, a first valve plate and a second valve plate; the lifting mechanism is connected with the first valve plate through the valve lifting rod, the second valve plate and a lifting regulation structure are arranged at the outside of the first valve plate, the upper part of the second valve plate is connected with the lifting regulation structure to form a sealed space so as to hold the first valve plate in the sealed space. According to the invention, the lower end of the valve lifting rod is connected the first valve plate held in the sealed space formed by the second valve plate and the lifting regulation structure, the first valve plate is lift to make the pressure differences on the two sides of the valve plate be approximate so as to communicate the two sides of the second valve plate to eliminate the pressure difference between the upper and lower sides of the second valve plate so as to reduce the lifting force of the second valve plate; the device is simple, compact and reasonable, and the device has the advantages of improving the dedusting efficiency of the dust collector, saving energy and prolonging the service life of the filter bag.

The invention discloses a lithium battery active equalization system and method. A plurality of batteries form a battery pack unit, a bidirectional DC / DC module is used for charging or discharging a single body with a large voltage difference, a working state of each DC / DC module is controllable, a circuit of the DC / DC module is independent, reliability is high, and complexity of the system is reduced; the DC / DC module is connected with a battery pack monomer through a switch array; only one monomer is equalized at the same moment, mutual influence between the circuits is avoided, a charging current is applied to the battery according to the voltage difference between the voltage value of the monomer of the battery and a set voltage, a maximum monomer charging current can reach 3-4A, an equalization speed is high, and the voltage of the monomer of the battery in each group unit is close to be consistent; and the charging and discharging current of the system is large, the voltage difference between the monomers is eliminated, equalization maintenance of the battery is completed, and the system and the method are widely applied to the fields of new energy automobile battery equalization system and second-hand battery equalization system transformation and power grid energy storage lithium battery application.

The invention provides a BMS multi-machine parallel connection implementation system, wherein a plurality of BMSs are connected in parallel and are connected with the bidirectional converter equipmentthrough a CAN bus, the plurality of battery packs corresponding to the plurality of BMSs are connected in parallel, and each BMS has an equipment code. The method is realized by adopting the following steps: determining one management system from the plurality of BMSs as a host and other BMSs as slaves; enabling the host to allocate IDs to the slaves according to the ID allocation table; and enabling the host to control the charging tubes and the discharging tubes of the host and the slaves according to the acquired slave information, so the corresponding BMSs are connected in parallel. An extra host is not needed, the host is not fixed, and the BMS connected in parallel can be added conveniently.

A shaft seal pressure compensation system for an underwater device such a remotely operated vehicle powered by motor driven thrusters where the shaft of the motor extends from a motor housing into the surrounding water and is sealed by a shaft seal by automatically supplying air to pressurize the thrusters to balance the internal pressure of the thrusters to match the ambient water pressure. The air is supplied by a variable volume container that responsive to a pressure differential between the external ambient pressure and an internal pressure within the variable volume gas container for adjusting the volume of the variable volume gas container so that the internal pressure equals the ambient pressure, and thus balancing the system.

Designs and techniques for fluid thrusters and vehicles that are powered by propelling fluids with fluid thrusters. Multiplex-thruster (MT) systems are disclosed that include a single thruster and a flow multiplexer with multiple channels to deliver thrusting flow in various directions.

The invention provides an automatic mahjong machine, which comprises a shuffling barrel arranged on an installation panel and a plurality of conveying assemblies located in the circumferential direction of the shuffling barrel. The conveying assembly comprises a mahjong tile feeding component, a vertical mahjong tile pushing component, a mahjong tile pushing component and a mahjong tile lifting component. The tile pushing component comprises a tile pushing assembly and a tile pushing groove used for containing mahjong tiles. The mahjong pushing groove comprises a mahjong inlet and a mahjong outlet; the mahjong tile feeding component comprises a mahjong tile feeding assembly communicated with the mahjong tile inlet; the vertical tile pushing component comprises a vertical tile pushing assembly located between the tile inlet and the tile feeding assembly. The other end of the mahjong tile lifting component of which one end is communicated with the mahjong tile outlet extends to the tabletop of the mahjong machine; the mahjong tile pushing assembly comprises a universal mahjong tile pushing rod for pushing mahjong tiles to move along the mahjong tile pushing groove; a first driving part for driving the universal mahjong pushing rod to rotate is arranged at the end, away from mahjong tiles, of the universal mahjong pushing rod, the rotating radius of the universal mahjong pushing rod synchronously changes along with the outline of the mahjong pushing groove, the mahjong lifting component comprises a mahjong lifting assembly and a second driving part, and the mahjong lifting assembly is driven by the second driving part to convey the mahjong tiles to the tabletop from the tile outlet.

Embodiments in accordance with the present invention provide a magnetic disk drive that reliably prevents entry of water or other form of liquid through a breathing hole for the enhanced performance, reliability, and the like. In one embodiment, a box body forming part of a hard disk drive (HDD) has a top cover. The top cover includes a breathing hole drilled therein. The breathing hole serves to eliminate any pressure difference between an inside and an outside of the HDD. A fiber waterproof body, which includes a waterproof fiber material or the like, is fitted in a large-diameter hole of the breathing hole. A pore waterproof body, formed by bundling up a large number of slender pores, is mounted in a small-diameter hole of the breathing hole.