60results about How to "Reduce suction pressure" patented technology

The invention provides a water pan and an air conditioner including the water pan. The water pan comprises a shell (10) and a porous material (20) arranged in the shell (10), wherein the shell (10) comprises a side plate (16), a bottom plate (11), and a sunk bottom (12) which is connected with the shell (10) and extends towards the lower side of the shell (10); the lower part of the sunk bottom (12) is provided with a drain hole (15); the drain hole (15) is formed in the side wall and / or bottom wall of the sunk bottom (12); and the porous material (20) covers the bottom plate (11). According to the water pan provided by the invention, the problem of splashing or overflowing of condensed water in the water pan of the air conditioner on the special occasions of vibration and swinging can be solved.

The invention discloses a low refrigerant charging amount heat pump device and a control method thereof. The device comprises a compressor, a compressor refrigerant gas outlet is sequentially connected with an indoor heat exchanger, a throttling device and an outdoor heat exchanger through a four-way reversing valve, an outlet of the outdoor heat exchanger is connected with an inlet of a liquid storage device through the four-way reversing valve, an outlet of the liquid storage device is connected with an inlet of the compressor, and the device further comprises a bypass pipeline; an inlet of the bypass pipeline is located between the compressor and the four-way reversing valve, an outlet of the bypass pipeline is located between the four-way reversing valve and the liquid storage device or located on the side or bottom of a shell of the liquid storage device, and a bypass electromagnetic valve is located on the bypass pipeline; under the heating condition, when the device stably runs, a refrigerant exhausted out of the compressor flows into the indoor heat exchanger through the four-way reversing valve and then flows back to the compressor through the throttling device, the outdoor heat exchanger, the four-way reversing valve and the liquid storage device, and a heating cycle is formed; and under the refrigerating condition, stable running is opposite to the heating cycle flow path. The control method of the device is further provided. In the cold starting process, the problem that a large number of refrigerants are gathered in the liquid storage device and the compressor, and consequently the pressure of an air inlet of the compressor is too low is solved.

The invention provides a control method for uniformly distributing a refrigerant during refrigeration of a modular multi-split air conditioner. The control method comprises the following steps of a) calculating the total capacity requirement N of an indoor unit module for m outdoor unit modules connected in parallel under the refrigeration operation state; b) initially distributing the capacity requirement of each outdoor unit module; c) detecting the bottom temperature Tbi of a compressor of the ith outdoor unit module by using a first temperature sensor; d) detecting the air return temperature Tri of the compressor of the ith outdoor unit module by using a second temperature sensor; e) calculating the air return superheat SHi of the ith outdoor unit module according to a formula that Shi=Tbi-Tri; f) adjusting the capacity requirement Ni of the ith outdoor unit module according to the air return superheat Shi of the ith outdoor unit module, making the air return superheat Shi and the adjusted capacity requirement NI' meet the following function: I=1,2,3,ellipsis,m, wherein NI'=[NI']=min{n belongs to Z and NI' is less than or equal to n}, and repeating steps c, d, e and f every ten minutes. The invention also provides a modular multi-split air conditioner for uniformly distributing a refrigerant during refrigeration. By the control method, the refrigerant in outdoor unit modules is distributed uniformly.

The invention relates to a sealing arrangement for sealing a reciprocating piston rod of a piston compressor relative to gaseous working medium of the piston compressor. The sealing arrangement has a first and a second sealing element which are separately arranged inside a recess of the sealing arrangement at an axial distance, and the sealing elements are arranged respectively at an axial end of the recess and in contact with the piston rod. A feed line for a sealing medium is provided in the sealing arrangement. The feed line is connected with the recess. The first and second sealing elements are configured to be separated from a radial direction end of the recess along a radial direction, thus the sealing medium plays action on the radial periphery surface of the first and the second sealing elements along the radial direction. A third sealing element is arranged in a third recess of the sealing arrangement and at a first axial end of the seaming arrangement. The third sealing element is implemented as a packing ring or packing ring combination. A scraper ring is arranged in a seventh recess between the first and the third sealing elements. The sealing arrangement is configured to maintain the scraper ring without differential pressure.

The invention discloses a double-circulation refrigerating system of an inverter refrigerator and a control method thereof, and relates to the technical field of refrigerators. The system comprises aninverter compressor, wherein an air outlet of the inverter compressor is sequentially connected with an anti-condensation pipe, a condenser, a filter and a one-inlet and two-outlet electric switchingvalve, and an air inlet of the inverter compressor is connected with a two-inlet and one-outlet electric switching valve; the two-inlet and one-outlet electric switching valve and the one-inlet and two-outlet electric switching valve are connected with a refrigerating branch I and a refrigerating branch II; the refrigerating branch I comprises a first capillary tube, a first evaporator and a first liquid accumulator; and the refrigerating branch II comprises a second capillary tube, a second evaporator and a second liquid accumulator. The liquid accumulators are arranged on the two refrigerating branches arranged in parallel respectively, and the two-inlet and one-outlet electric switching valve and the one-inlet and two-outlet electric switching valve are opened and closed, so that migration of refrigerants in two chambers is controlled, and sufficient utilization of the refrigerants is guaranteed.

The invention relates to the field of air conditioners, and provides a method of reducing an operating load of a compressor and an air conditioner. A refrigeration control method comprises the following steps of acquiring a condenser coiler temperature in a refrigerating condition; and reducing an air speed gear of an indoor fan in a condition that the acquired condenser coiler temperature is higher than a temperature threshold value corresponding to the existing air speed gear. The suction temperature and the suction pressure of the compressor are reduced by reducing the air speed gear of theindoor fan, so that the exhausting temperature and the exhausting pressure of the compressor are further reduced. The operating load of the compressor is reduced timely, so that shutdown caused by overload protection of the compressor in a high-temperature and high-load condition is avoided when the air conditioner refrigerates.

Methods and systems are provided for adjusting a wastegate in response to condensate forming conditions in a charge air cooler (CAC). In one example, a wastegate may be opened in response to an induction pressure greater than a threshold pressure when the induction pressure is greater than required to produce a manifold pressure required for a torque demand. Further, a compressor recirculation valve may be opened to further reduce the induction pressure during certain driving conditions.

A membrane for vacuum suction of a silicon water typically used inside a polishing head. The membrane has a flat main body and a plurality of protrusions each having a spiny shape over the surface of the flat main body. The protrusions are formed in positions that correspond to the holes of a supporting multiple-hole panel. The protrusions on the flat main body lower the suction pressure between the wafer and the membrane somewhat so that wafer unloading failure is minimized.

The invention relates to a negative-pressure self-cooling vapor compression type heat pump and a system thereof. The equipment and the system thereof are mainly applied to the field of steel mill slag washing water waste heat recovery. According to the negative-pressure self-cooling vapor compression type heat pump and the system thereof, a small amount of electric energy is consumed, and waste heat in steel mill slag washing water is extract to supply heat for a building. The negative-pressure self-cooling vapor compression type heat pump consists of a slag washing water inlet (1), a non-condensable gas separator (2), an evaporator (3), a water vapor compressor A (4), a water vapor compressor B (5), a condenser (6), a high-temperature water circulating pump (7), a high-temperature water heat exchanger (8), a subcooler (9), a regulating valve (10), a slag washing water outlet pipe (11), a slag washing water discharge pump (12), a liquid spray electromagnetic valve (13), a vacuum pump A (14), a vacuum pump B (15), a tail end water inlet (16), a tail end water outlet (17) and a slag washing water outlet (18).

Methods and systems are provided for adjusting a compressor recirculation valve in response to condensate forming conditions in a charge air cooler (CAC). In one example, a compressor recirculation valve may be opened in response to an induction pressure greater than a threshold pressure when the induction pressure is greater than required to produce a manifold pressure required for a torque demand. Further, a wastegate may be opened to further reduce the induction pressure during certain driving conditions.

An electromagnetic pump has a frequency converter circuit for driving the electromagnetic pump, wherein the frequency converter circuit comprises an oscillator circuit, a bistable circuit and a push-pull circuit. The oscillator circuit oscillates to transform DC into a single-phase oscillating signal. The bistable circuit splits the single-phase oscillating signal into a N-phase stimulus signal and a S-phase stimulus signal. The push-pull circuit amplifies and transports the N-phase stimulus signal and the S-phase stimulus signal to the electromagnetic pump to make the swing arms of the electromagnetic pump swinging effectively, wherein the swing speed, the swing frequency and the swing amplitude of the swing arms vary with the change of the oscillation frequency of the oscillator circuit. Thereby, the suction pressure and the discharge pressure of the electromagnetic pump could further be adjusted higher or lower, wherein said frequency converter circuit comprises a modulation circuit, which could change the swing speed of the swing arms swinging outwardly or inwardly to further increase or decrease the suction pressure or the discharge pressure.

The invention concerns a method whereby components are arranged in a mounting device, outside an internal high-pressure forming press, in accordance with their position and their function, such that they are linked to one another. The mounting device comprises an upper part and a lower part including cavities identical to the cavities of the internal high pressure tool. Once the components have been installed, the mounting device is introduced in the internal high-pressure press, then the upper part or the lower part of the mounting device is withdrawn, the part of the mounting device remaining in the internal high-pressure press being displaced against the upper tool or the lower tool. For the forming process, the components are maintained in a part of the tool by depression or by clamping, then the part of the mounting device is removed from the internal high-pressure press, thereby ensuring high precision positioning of components. Additionally, the production rate is substantially increased. The invention is particularly applicable for the production of cam shafts.

The invention provides a refrigerating unit and a control method thereof. The refrigerating unit comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger and a first throttling device, wherein the first throttling device is arranged between the indoor heat exchanger and the outdoor heat exchanger; the refrigerating unit further comprises a first branch; one end of the first branch communicates with a pipeline between the outdoor heat exchanger and the compressor, and the other end of the first branch communicates with a pipeline between the outdoor heat exchanger and the first throttling device; and the first branch can guide a refrigerant at the outlet end of the outdoor heat exchanger back to the inlet end of the outdoor heat exchanger when the indoor heat exchanger isdefrosted. According to the refrigerating unit and the control method thereof, the flow of the refrigerant entering an air suction port of the compressor can be reduced when the indoor heat exchangeris used for heating and defrosting, the air suction pressure of the compressor is reduced, the exhaust high-pressure of the compressor is reduced, the situation that the high pressure of the refrigerating unit is high in the defrosting period, and consequently unit defrosting is finished in advance is avoided, and the defrosting process is effectively and continuously carried out.

The invention discloses a single-chip single-layer hollow fiber membrane component, comprising a plurality of membranes, an upper collector pipe, a lower collector pipe, an upper collector chamber and a lower collector chamber, which is characterized in that: the membranes are composed of a hollow fiber membrane silk; the collector pipes are arrange around the membranes; the upper and the lower collector pipes are inward connected with the upper and the lower collector chambers respectively; the upper and the lower collector chambers are connected with the two ends of the hollow fiber membrane silk respectively; each membrane is a single chip and a single layer; the distance between the adjacent membranes is 10 to 12 mm ; plastic knit meshes on the upper collector chamber are hanged up at two sides of each membrane and the upper end of each membrane is connected with the plastic knit meshes; a plurality of aeration pipes are arranged between the adjacent membranes on the lower collector chamber and holes are arranged on the aeration pipes. The single-chip single-layer hollow fiber membrane component has the advantages that: obvious longer duration of the stable stage than that using the common membrane component; reduced tangle of fiber membrane silk, less stuck or clogging of fiber membrane silk by mud or small particle; less membrane pollution and cleaning times; meanwhile small membrane crossing pressure when running and the energy consumption.

The invention discloses a processing method of coal mine water and / or coal washing waste water. The processing method comprises following steps: 1, coal mine water and / or coal washing waste water is introduced into an adjusting pool to adjust water quality and water amount so as to obtain raw water; 2, the raw water is introduced into a flat ceramic membrane pool, a flat ceramic membrane assemblyis adopted for purification to remove small particles in the raw water and reduce the turbidity of produced water, wherein according to the operation mode of the flat ceramic membrane assembly, pumping, intermittent stopping, and backwash period are adopted alternatively; and 3, bottom sludge from the flat ceramic membrane pool is prepared into coal washing cakes which can be mixed with coal-air fuel, so that a fuel is prepared, and sludge resource utilization is realized, and produced water of the flat ceramic membrane assembly is subjected to deep treatment or is subjected to direct recycling as industrial recycled water. The processing method is capable of removing large particles, and small particles effectively; no medicine is added; the bottom sludge can be recycled as a fuel; the water quality of obtained water is stable, and recycling standards are reached.

The invention concerns a method whereby components are arranged in a mounting device, outside an internal high-pressure forming press, in accordance with their position and their function, such that they are linked to one another. The mounting device comprises an upper part and a lower part including cavities identical to the cavities of the internal high pressure tool. Once the components have been installed, the mounting device is introduced in the internal high-pressure press, then the upper part or the lower part of the mounting device is withdrawn, the part of the mounting device remaining in the internal high-pressure press being displaced against the upper tool or the lower tool. For the forming process, the components are maintained in a part of the tool by depression or by clamping, then the part of the mounting device is removed from the internal high-pressure press, thereby ensuring high precision positioning of components. Additionally, the production rate is substantially increased. The invention is particularly applicable for the production of cam shafts.

The invention discloses a pneumatic ice storage air conditioning device for downhole rescue. The pneumatic ice storage air conditioning device comprises a mechanical refrigeration module consisting of a compressor, a safety valve, an oil separator, a condenser, a liquid storage device, a drying filter, a liquid spraying valve, a thermal bypass valve, a gas-liquid separator, a stop valve and the like, an ice storage box module consisting of liquid sight glass, a thermal expansion valve, an ice storage box, a stop valve and the like, a gas path module consisting of a compressed air source, an air filter, a pressure release valve, an atomized lubricator, a pneumatic motor, a flow adjustment valve, a pneumatic condensation fan, a muffler and the like, and a cold release module of a compressed air steel bottle, an adjustment hand valve, a pressure adjuster, a pneumatic fan, a muffler and the like. The pneumatic ice storage air conditioning device for downhole rescue is high in refrigeration efficiency; downhole compressed air is used as an air source, and no power supply is needed in a working process; a refrigeration system adopts a supercooling design; the system can realize continuous running, and a press does not need to be automatically controlled to be switched on and switched off; the compressor is connected with the pneumatic motor through a belt in a transmission manner; the pneumatic ice storage air conditioning device is high in assembling efficiency, and the transmission ratio is controllable.

The invention discloses a single refrigerator circuit full-direct-expansion temperature-humidity independent control air conditioning system. The system comprises an indoor unit, an outdoor unit and asensible heat multi-split terminal, wherein the indoor unit is mainly used for treating fresh air and mainly comprises a reheating heat exchanger and a fresh air heat exchanger; the outdoor unit achieves the function of a condenser and mainly comprises a compressor, two four-way valves and an outdoor heat exchanger; the sensible heat multi-split terminal is arranged in a room and used for treating return air and comprises a sensible heat multi-split heat exchanger. According to the single refrigerator circuit full-direct-expansion temperature-humidity independent control air conditioning system provided by the invention, the sensible heat multi-split terminal and a direct-expansion fresh air treatment terminal are used for supplying cold and heat, a water system is not needed, the cost can be effectively lowered, and the system integration level is improved.

An electromagnetic pump has a frequency converter circuit for driving the electromagnetic pump, wherein the frequency converter circuit comprises an oscillator circuit, a bistable circuit and a push-pull circuit. The oscillator circuit oscillates to transform DC into a single-phase oscillating signal. The bistable circuit splits the single-phase oscillating signal into a N-phase stimulus signal and a S-phase stimulus signal. The push-pull circuit amplifies and transports the N-phase stimulus signal and the S-phase stimulus signal to the electromagnetic pump to make the swing arms of the electromagnetic pump swinging effectively, wherein the swing speed, the swing frequency and the swing amplitude of the swing arms vary with the change of the oscillation frequency of the oscillator circuit. Thereby, the suction pressure and the discharge pressure of the electromagnetic pump could further be adjusted higher or lower, wherein said frequency converter circuit comprises a modulation circuit, which could change the swing speed of the swing arms swinging outwardly or inwardly to further increase or decrease the suction pressure or the discharge pressure.

The embodiment of the invention discloses a hot air deicing refrigeration system of a single-plate plate ice machine. In the hot air deicing refrigeration system of the single-plate plate ice machine, a bypass electromagnetic valve and a pressure control valve are sequentially connected in series between the outlet end of a pressure-difference electromagnetic valve and the outlet of a return-air filter. In the hot air deicing refrigeration system of the single-plate plate ice machine provided by the embodiment of the invention, a KVC pressure control valve and the bypass electromagnetic valve are connected in series between the output end of the pressure-different electromagnetic valve and the air outlet end of the return-air filter, wherein the bypass electromagnetic valve ensures that the air absorption pressure of a refrigeration compressor is not too low and that part of the hot air is used for deicing; and the KVC pressure control valve adjusts the opening thereof according to the pressure behind the valve to ensure that the suction pressure of the refrigeration compressor is identical with the pressure in an ice making process. Thus, the stability of the refrigeration system is ensured.

A fuel supplying system of an LPI engine is capable of improving performance of a fuel pump by decreasing suction pressure thereof. A fuel supplying system of an LPI engine may include a fuel tank storing fuel, a fuel pump feeding fuel supplied by the fuel tank to the engine through a fuel supplying line, and a fuel return line for returning fuel from the engine to the inside of the fuel tank. The fuel pump may be divided into a pump chamber and an operating chamber, and a vent hole is formed at a case of the fuel pump.

The disclosed systems and methods provide a simple, safe, effective and widely applicable method to clean the inside of an endotracheal tube. For instance, disclosed is an endotracheal suction catheter that includes a brush-suction segment that allows the catheter to mechanically brush off secretions on the inner surface of an endotracheal tube (“ETT / TT”) while simultaneously suctioning the debris.

The invention provides a water pan and an air conditioner including the water pan. The water pan comprises a shell (10) and a porous material (20) arranged in the shell (10), wherein the shell (10) comprises a side plate (16), a bottom plate (11), and a sunk bottom (12) which is connected with the shell (10) and extends towards the lower side of the shell (10); the lower part of the sunk bottom (12) is provided with a drain hole (15); the drain hole (15) is formed in the side wall and / or bottom wall of the sunk bottom (12); and the porous material (20) covers the bottom plate (11). According to the water pan provided by the invention, the problem of splashing or overflowing of condensed water in the water pan of the air conditioner on the special occasions of vibration and swinging can be solved.

The invention provides a low-temperature storage device and a control method thereof, and relates to the technical field of low-temperature storage. The low-temperature storage device is used for solving the problem that a load of a compressor is large when a refrigeration system of an existing low-temperature storage device starts to run, and a protector is easy to trip. The low-temperature storage device comprises a fourth connecting branch, a control valve, an expansion container, and a detecting device, wherein one end of the fourth connecting branch is connected with an air outlet of a liquid distributor, and the other end of the fourth connecting branch is connected with an air suction port of the compressor; the control valve is arranged on the fourth connecting branch, and the expansion container is connected with the fourth connecting branch on the downstream side of the control valve; and the detecting device is configured to detect a pressure value in the fourth connecting branch located on the upstream side of the control valve, and when the pressure value is greater than or equal to a threshold value, the control valve is opened so that a refrigerant flowing out of theair outlet of the liquid distributor flows into the expansion container along the fourth connecting branch. The device may be used for low temperature storage of articles.

The invention concerns a method whereby components are arranged in a mounting device, outside an internal high-pressure forming press, in accordance with their position and their function, such that they are linked to one another. The mounting device comprises an upper part and a lower part including cavities identical to the cavities of the internal high pressure tool. Once the components have been installed, the mounting device is introduced in the internal high-pressure press, then the upper part or the lower part of the mounting device is withdrawn, the part of the mounting device remaining in the internal high-pressure press being displaced against the upper tool or the lower tool. For the forming process, the components are maintained in a part of the tool by depression or by clamping, then the part of the mounting device is removed from the internal high-pressure press, thereby ensuring high precision positioning of components. Additionally, the production rate is substantially increased. The invention is particularly applicable for the production of cam shafts.

The invention relates to a housing of a froth skimmer for pre-cooking water. The housing comprises a rectangular enclosure. The left end of the enclosure is provided with a downwardly bent portion. The lower end face of the downwardly bent portion is provided with a through hole. The upper end face of the enclosure is provided with a changing hole. The right of the enclosure inclines rightwardly up. A handle is fixed to the front end face of the enclosure. A hinge plate is arranged at the right end of a bottom plate of the enclosure. The hinge plate is evenly provided with round holes. The froth skimmer can turn flexibly and fully press froth into the enclosure, the froth pressed into the enclosure soon attaches to a filter layer, water passing through the filter layer can continue flowing out of a water outlet, water suction pressure of the filter layer is reduced, and the ability of the filter layer to suck and receive impurities is improved. The used filter layer, sponge, can be taken out from a flip cover for changing and cleaning, so that the device is reusable and the application cost of the device is lowered.

The present invention provides a medium-holding device capable of setting a suction pressure for each of various areas within a suction-holding surface, a medium-conveying device, and an inkjet recording device. In an embodiment of the invention, a cover is attached to a main body formed into a drum shape such that a surface of the cover functions as the suction-holding surface for a paper sheet. The cover has a plurality of suction apertures formed thereon from which suction apertures the paper sheet on the suction-holding surface is sucked. The suction apertures are arranged at a certain pitch. A specific suction aperture of them has a narrowing member attached thereto. The suction aperture having the narrowing member attached thereto has the suction pressure lowered. Therefore, by adjusting an arrangement of the specific suction aperture having the narrowing member attached thereto, the suction pressure can be partially controlled within the suction-holding surface.

A cooling device for cooling a test sample has at least two cascade cooling stages, each with at least one coolant line, one compressor (1.1, 2.1), one relief throttle (1.4, 2.4), one evaporator (6, 7) and one liquefier (3, 6). The cooling device has an additional relief throttle disposed between the evaporator (7) of the last cascade cooling stage and the compressor (2.1) of the last cascade cooling stage. This represents a simple possibility of adjusting the cooling temperature, thereby avoiding the use of valves that can be adjusted at low temperatures, since these are complex and expensive.

Method for introducing and maintaining a level of negative pressure in a body cavity of at least 80 mmHg using a tube having an elongate distal portion and a proximal portion having first and second arms, each arm having a lumen in flow communication with one another and with the body cavity via apertures at or near the distal end of the tube, wherein the first arm or tubular extension therefrom is adaptable to receive suction from a suction source. An indicator, arranged in relation to the second arm, signals when a specific negative pressure has been exceeded in the tube, or a valve, arranged in relation to the second arm, admits ambient air into the lumen of the second arm when suction is applied to the tube and differential air pressure between the air in the lumens of the tube and ambient air exceeds a specified amount.

The invention provides a thick film circuit hole metallization method and a thick film circuit printing method. The suction pressure of a negative pressure cavity on first through holes with various sizes on a substrate is buffered and balanced through a printing plate which is arranged between the negative pressure cavity and the substrate and is provided with second through holes, so that the negative pressure in the negative pressure cavity can be uniformly transmitted to the first through hole in the substrate along the second through holes in the printing plate, further a conductor paste near the first through hole can uniformly flow down along the hole wall of the first through hole, and the connection qualification rate of the double-sided circuit of the substrate is improved; and the suction pressure of the negative pressure cavity is relieved, the problem that the substrate is polluted due to the fact that the conductor slurry overflows to the other side of the substrate from the first through hole can be avoided, and the product percent of pass and quality are further improved while conventional conductor slurry which is not limited by temperature can be utilized to perform hole metallization, so that the cost is reduced.