55 results about "Liquid piston" patented technology

A toe valve system positioned along a tubing string. The toe valve system a piston sleeve slidably disposed in an outer housing which has ports therethrough. The toe valve system comprises a shifting sleeve shiftable between positions with respect to the ports. A piston sleeve initially held in a position closing off the at least one port to prevent flow between the interior and exterior of the tubing string. A compensator sleeve mounted within the outer housing, wherein the compensator sleeve is free floating and can accommodate changes in tubing pressure. A piston chamber filled with a liquid which is located between the piston sleeve, the compensator sleeve and the outer housing. The liquid in the piston chamber is retained by a rupture disk that can release the liquid when sufficient pressure is applied within the toe valve system causing the piston sleeve to move and opening the ports.

The invention discloses a liquid piston and water foam compounded multi-stage isothermal compression device and method, the device mainly comprises a low-pressure compression cavity and a high-pressure compression cavity, the liquid piston is utilized to realize preliminary compression of gas, and the water foam is introduced in the multi-stage compression process to enhance heat exchange. Gas compressed by the low-pressure compression cavity is introduced into a liquid working medium at the bottom of the high-pressure compression cavity, water foam is spontaneously generated, compression heat is efficiently absorbed through the large specific surface area of the foam, and the nearly isothermal compression process is achieved. According to the device, single-stage power loss is reduced through multi-stage compression, the throttling valve is used for regulating and controlling the gas inlet rate so as to control foam generation, a liquid working medium is recycled through the gas-liquid separation mechanism, and therefore the system energy efficiency and the output gas purity are improved. Different from an existing mode of generating foam by depending on an additional power mechanism, the device can form foam by directly blowing the low-pressure compressed gas into the liquid without additional energy consumption, so that the efficiency and the economical efficiency of the compressed air energy storage system can be remarkably improved.

A slow expansion compressor (1) of the mechanical liquid piston type comprises a liquid cylinder (8) which pivots about a tilt axis (9) and in which a hydraulic piston (10) is translated, which hydraulic piston is firmly fixed to a connecting rod (11) of a crank (26) connected to a crankshaft (24), the axis of rotation of which is parallel to the tilt axis (9), and a piston guide member (23) maintaining the connecting rod (11) and the hydraulic piston (10) always parallel to the hydraulic cylinder (8), both forming a variable hydraulic volume (12) filled with the working liquid (13), communicating with a gas and liquid reservoir (14) in which the heat exchange and accumulation member (16) is housed, the reservoir (14) and the liquid (13) form a variable pneumatic volume (2) in which the working gas (5) is compressed or expanded.

According to the piston rotation duration measuring and calculating device for the liquid piston type pressure gauge, the piston to be measured is installed through the installation base on the inspection bench, the piston can rotate on the installation base, images are collected in real time through the high-speed camera assembly above the piston in the piston rotation process, and the piston rotation duration measuring and calculating device is used for measuring and calculating the piston rotation duration of the liquid piston type pressure gauge. The camera is used for collecting images of the piston to be measured and transmitting the collected images to the industrial control host assembly, and the industrial control host assembly is used for analyzing the obtained images, so that measurement and calculation of the rotation duration of the piston are completed, and data of the rotation duration of the piston to be measured are obtained. According to the utility model, image detection is used for measuring and calculating the rotation duration of the piston, and the obtained images are identified frame by frame, so that the measurement result of the rotation duration of the piston is obtained; the technical problems that in the prior art, the rotation duration of the piston of the liquid piston type pressure gauge is measured and calculated through a manual meter clamping mode or a photoelectric sensor and a coded disc mode, errors are large, and use is inconvenient are solved.

The utility model discloses an efficient waste liquid purification system for processing, which relates to the technical field of electrophoresis waste liquid purification treatment and comprises a pump liquid piston inserted into a driving seat. The mixing assembly can be driven by the driving motor to mix waste water and liquid medicine in the treatment barrel for use, meanwhile, the liquid pumping assembly can pump the agent in the liquid storage barrel into the treatment barrel in the stirring and mixing process, the agent can be pumped into different depths of the waste liquid in the treatment barrel in a layered mode, and the treatment efficiency is improved. The flocculation reaction device can be fully mixed, stirred and flocculated with waste liquids at different depths, is high in mixing efficiency and mixing uniformity, and solves the problems that when a flocculation reaction device used in the existing electrophoresis waste liquid purification treatment is used, a flocculation agent and to-be-treated waste water enter a treatment barrel in batches, so that the flocculation agent and the to-be-treated waste water are layered, and the flocculation effect is poor. The mixing efficiency is slow and the mixing uniformity is poor during subsequent stirring and mixing.

The invention discloses a two-stage push rod assembly based on a built-in spring and a foam pump distributor thereof. Comprising a push rod body, a connecting piece, an elastic reset piece and a transmission rod. The foam pump distributor further comprises a main body, a thread outer sleeve, a pump head, a gas pumping piston, a liquid pumping piston and the secondary push rod assembly. A pump head is pressed to drive an air pumping piston and a liquid pumping piston to be pushed downwards, the cooperative work of pumping and pushing is synchronously completed in the pressing stroke, and liquid and air are quantitatively conveyed to a mixing cavity through a flow divider to be foamed and sprayed out; meanwhile, the pump liquid piston abuts against and pushes the push rod body to press the push rod body downwards to a preset extending stroke position; on the premise that the overall size of the distributor is not increased, the foam pumping function and the push rod stretching-out function are highly integrated in single-time pressing operation, the structure is compact, the action is reliable, and the function integration degree and the user experience of a product are remarkably improved.

GROUPED MECHANO-LIQUID PISTON HEAT PUMP The grouped mechano-liquid piston heat pump (1) comprises a blind liquid cylinder of compressors (8) in which a double-acting hydraulic piston of compressors (10) moves to form a first and second hydraulic variable volume of compressor (12, 134), and a blind liquid cylinder of expansion valves (30) in which a double-acting hydraulic piston of expansion valves (39) moves to form a first and second hydraulic variable volume of expansion valve (44, 46), said hydraulic variable volumes (12, 134, 44, 46) communicating with compressor and expansion valve gas and liquid reservoirs (14, 29, 50, 55) in which are housed compressor and expansion valve heat exchange and accumulation means (16, 59, 139, 70), this to form a compressor (3) and a regulator (4). Figure for the abbreviation: Fig. 4

The application provides a kind of liquid piston compressor segmented speed trajectory optimization control method and system, it is related to liquid piston compressor control technical field, obtains initial gas state, target termination volume, target pressure ratio and total compression time, according to initial gas volume, target termination volume and liquid piston equivalent action area determine total stroke and reference average speed;Compression process is divided into multiple speed control sections, non-dimensional speed and time coefficient are used for segmented speed trajectory parameterization, to generate candidate trajectory;Candidate trajectory is subjected to termination displacement constraint check and normalization repair;With peak temperature and maximum pressure change rate as evaluation index, under the constraint of maximum speed, maximum acceleration and termination pressure ratio allowable deviation, fitness function is constructed and speed parameter is optimized;According to the optimization result, speed command or displacement command is generated;Under the premise of meeting the ability of actuator and termination pressure ratio deviation requirement, effectively reduce the peak temperature and pressure change rate of compression process.

The paper presents an invention regarding a SPM smart power module, intended for the creation of distributed, safe and efficient energy networks. An elementary module is composed of an innovative Carnot Battery, with high power density, consisting of a heat engine / heat pump whose working agent (gas or vapor) goes through a Carnot / Ericsson / Stirling cycle and which transfers thermal energy between two accumulators with different temperatures. In supply mode, the cycle is run in the direct direction and supplies mechanical / electrical energy, and in charging mode, the heat pump receives energy from the outside (from the network or from renewable sources), and the cycle is run in the opposite direction, transferring thermal energy from the cold reservoir to the hot reservoir. The maximum efficiency of the battery is ensured by at least two isothermalizers, similar to the one described in PCT / R02023 / 050009. Through a system of tanks, heat exchangers, circulation pumps, solenoid valves and pipes, the elementary module can receive a series of extensions, both on the thermal energy capture and distribution side. An intelligent processor collects signals from the SPM system, from a dispatcher, from the Internet, etc, processes them, then sends commands to the motors that actuate the solid pistons of the isothermalizers, the flow regulators of the liquid pistons and of the cooling systems, the solenoid valves, the circulation pumps, in such a way as to ensure the maximum exergetic and economic efficiency of the module, the flattening of load peaks, the maximum safety, the maximum utilization coefficient of all components. Any energy production unit and any consumer can be included in a smart module that ensures the storage, then the supply of the entire energy offers, ensuring consumers a safe, uninterrupted supply.

The application relates to a damping buffer device for connecting large floating bodies, which comprises a shell, even liquid dampers are arranged on both sides of the shell, the liquid dampers on the same side are symmetrically arranged in pairs with respect to the shell, piston shafts connected with the floating bodies are arranged on the liquid dampers, the liquid dampers comprise cylinder bodies, piston plates in sliding connection with the inner walls of the cylinder bodies are arranged in the cylinder bodies, the lower side regions of the piston plates are in communication with the interiors of the shells and are filled with buffer damping liquid, the upper side surfaces of the piston plates are fixedly connected with the piston shafts, the upper ends of the cylinder bodies are closed structures and form branch buffer cavities with the piston plates, the branch buffer cavities are filled with buffer damping liquid, the branch buffer cavities on the two liquid dampers symmetrically arranged with respect to the shell are communicated with each other through connecting pipes, the application has simple structure and low manufacturing cost, can realize flexible liquid buffering of different dimensions and different angles of the floating bodies connected on both sides, and can avoid the breakage or damage of the floating bodies caused by rigid contact.

The utility model belongs to the technical field of spray covers, and mainly relates to a spray cover and an aerosol can, the spray cover comprises a pressing block movably assembled on a can body, the pressing block is provided with an insertion pipe and a nozzle which are communicated with each other, and the outer side of the insertion pipe is sleeved with a slow release assembly; the slow release assembly comprises a piston and a cavity with a sealed cavity, the piston and the cavity are connected to the outer side of the insertion pipe in a sleeving mode, and the piston is fixedly connected with the pressing block through a sleeve connected to the insertion pipe in a sleeving mode. The cavity is used for being filled with liquid with viscous resistance, the piston divides the cavity into a first cavity and a second cavity which are communicated with each other, and the pressing block is moved to drive the piston to slide in the cavity so that the liquid can flow between the first cavity and the second cavity; the insertion pipe is sleeved with a spring, and the two ends of the spring are connected with the pressing block and the cavity respectively. The reset speed of the pressing block is delayed through the synergistic effect of the viscous resistance of the slow release assembly and the elastic force of the spring, and therefore the valve rod can still be kept in the open state temporarily after pressing is stopped, and continuous release of spray is achieved.

This invention discloses a four-stage series double-acting liquid piston Stirling refrigeration and heating device, relating to the field of Stirling refrigeration technology. It includes an outdoor unit and an indoor unit. The indoor unit includes a first refrigeration unit and a second refrigeration unit, while the outdoor unit includes an engine first and an engine second. Engine first is connected to a first solar collector, and engine second is connected to a second solar collector. This invention employs the aforementioned four-stage series double-acting liquid piston Stirling refrigeration and heating device. By replacing the traditional mechanical piston with a liquid piston, it solves the inherent problems of traditional Stirling refrigeration machines, such as working fluid leakage and difficult maintenance. This improves the stability and reliability of the refrigeration system, significantly extending its service life. The four-stage series mechanism enables cascaded energy utilization, reducing energy consumption. It allows for switching between refrigeration and heating modes, has a simple structure, is economical and environmentally friendly, and can greatly meet the needs of daily life.

A pump dispenser includes an air cylinder, an air piston provided in the air cylinder to reciprocate, a liquid cylinder, a liquid piston provided in the liquid cylinder to reciprocate, a mixing chamber having a communication hole in an upper wall thereof and provided on the secondary side of the air piston and the liquid piston to mix a liquid material and air supplied by reciprocation of the air piston and the liquid piston, a porous body provided on the secondary side of the mixing chamber, and a nozzle including a flow path formed on the secondary side of the porous body and a discharge hole whose opening area is smaller than an opening area of the flow path to reciprocate thereby to cause the air piston and the liquid piston to reciprocate.

The mechanical liquid piston slow expansion compressor (1) comprises a liquid cylinder (8) which pivots about a tilt axis (9) and into which a hydraulic piston (10) translates, which is fixedly secured to a connecting rod (11) connected to a crank (26) of a crankshaft (24), the axis of rotation of which is parallel to the tilt axis (9), while piston guiding means (23) maintain the connecting rod (11) and the hydraulic piston (10) always parallel to the liquid cylinder (8), these two latter forming a variable hydraulic volume (12) filled with a working liquid (13) which communicates with a gas and liquid reservoir (14) in which heat exchange and accumulation means (16) are housed, said reservoir (14) and said liquid (13) forming a variable pneumatic volume (2) in which a working gas (5) is compressed or expanded.

The invention belongs to the technical field of energy storage, and discloses a high-pressure compressed air energy storage system and method based on a double-tank liquid piston system.The system comprises two pressure tanks, a water pump, a control valve set, a compressed air inlet system, a high-pressure air outlet system and a heat energy management system, a heat insulation air bag is arranged in at least one pressure tank, air which is pre-compressed to original energy storage pressure is guided into the heat insulation air bag through a compressed air inlet system, air which is compressed to the highest safety pressure of a salt cavern is transferred to the salt cavern to be stored through a high-pressure air outlet system, and heat generated in the compression process is recycled through a heat energy management system. According to the method, high-pressure compressed air energy storage is achieved through the system, and two compression processes are included. Compressed air can be further compressed to the highest safety pressure of the salt cavern from the conventional energy storage pressure, so that the capacity and efficiency of an energy storage system are improved, and the unit energy storage cost is reduced.

The application discloses a compressed air energy storage power generation system with high response speed and an operation method thereof. The outlet of a heat accumulator is connected with the inlet of a double-tank liquid piston, the outlet of the double-tank liquid piston is connected with a gas storage tank, and the outlet of the gas storage tank is connected with the inlet of an expansion generator set and the inlet of the double-tank liquid piston. A heat exchanger is arranged in the expansion generator set, the outlet of high-temperature concentrated ammonia water solution of a mixer in an ammonia compression-absorption composite heat pump unit is connected with the hot side inlet of the heat exchanger, and the hot side inlet of a solution heat exchanger in the ammonia compression-absorption composite heat pump unit is connected with the hot side outlet of the heat exchanger. The compressed ammonia steam outlet of the ammonia compression-absorption composite heat pump unit is connected with the cold side inlet of the heat accumulator, and the outlet of preheated dilute ammonia water solution of the ammonia compression-absorption composite heat pump unit and the cold side outlet of the heat accumulator are connected with the hot side inlet of the heat exchanger through the mixer. The system response speed is improved by using the fast response speed of the liquid piston to compensate for the slow start speed of the expander.

The invention belongs to the technical field of isothermal air compression, and discloses a modular liquid piston isothermal air compression system and an operation method thereof.The modular liquid piston isothermal air compression system comprises a cooling water main pump, a heat exchanger, a compression liquid pump, a left compression tank set and a right compression tank set; a left compression tank group liquid outlet valve and a right compression tank group liquid outlet valve are connected and connected to a compression liquid pump, a left compression tank liquid inlet valve and a right compression tank liquid inlet valve are connected and connected to a heat exchanger, and a left compression tank low-pressure gas inlet valve and a right compression tank low-pressure gas inlet valve are connected and connected to a low-pressure gas inlet. The left compression tank high-pressure gas outlet valve and the right compression tank high-pressure gas outlet valve are connected and connected to the high-pressure air outlet, and the operation method adopts the system and comprises two stages which are carried out alternately. Through accurate staggered-phase operation of the multiple pairs of compression tanks, highly stable output of compressed air is achieved, and the output pulsation problem of a traditional liquid piston system is solved.

The paper presents an invention regarding a SPM smart power module, intended for the creation of distributed, safe and efficient energy networks. An elementary module is composed of an innovative Carnot Battery, with high power density, consisting of a heat engine / heat pump whose working agent (gas or vapor) goes through a Carnot / Ericsson / Stirling cycle and which transfers thermal energy between two accumulators with different temperatures. In supply mode, the cycle is run in the direct direction and supplies mechanical / electrical energy, and in charging mode, the heat pump receives energy from the outside (from the network or from renewable sources), and the cycle is run in the opposite direction, transferring thermal energy from the cold reservoir to the hot reservoir. The maximum efficiency of the battery is ensured by at least two isothermalizers, similar to the one described in PCT / R02023 / 050009. Through a system of tanks, heat exchangers, circulation pumps, solenoid valves and pipes, the elementary module can receive a series of extensions, both on the thermal energy capture and distribution side. An intelligent processor collects signals from the SPM system, from a dispatcher, from the Internet, etc, processes them, then sends commands to the motors that actuate the solid pistons of the isothermalizers, the flow regulators of the liquid pistons and of the cooling systems, the solenoid valves, the circulation pumps, in such a way as to ensure the maximum exergetic and economic efficiency of the module, the flattening of load peaks, the maximum safety, the maximum utilization coefficient of all components. Any energy production unit and any consumer can be included in a smart module that ensures the storage, then the supply of the entire energy offers, ensuring consumers a safe, uninterrupted supply.

The invention relates to novel renewable energy that is conceived with chains of liquid pistons. Another solution consists in arranging the reservoirs that contain these liquid pistons at the ends of the spokes of submerged wheels. There are preferably seven such spokes, which makes it possible to permanently have four active reservoirs, two in the descending phase and two in the ascending phase, at reasonable depths below the ten metres of depth of the level of the surface of the liquid pistons from which they are activated. A multi-injector array, referred to as "pan flute", is arranged in a stationary position under the wheels in order to fill the reservoirs when they pass through the lower portion and to ensure that they ascend. Rails are also provided in stationary positions in the upper portions, guiding additional shafts arranged in the upper portions of the reservoirs, making it possible to limit the volume of gas that they contain to what is required for them to descend. The technological difficulties in operating and servicing of the solution are limited to the well-solved difficulties of self-lubricated sealed bearings receiving the shafts of the wheel and the reservoirs. Since the energy required for injecting gas is much lower than the energy produced during the descending and ascending phases, the solution provides a highly favourable energy balance; electric power plants consisting of around fifteen of these wheels can achieve electric power that allows them to rival nuclear reactors.

A medical device for delivering a liquid to an electrosurgical instrument. A plunger is movably disposed and biased within a fluid reservoir. The plunger includes a first colored portion and a second colored portion. The first colored portion is viewable through the window with the fluid reservoir containing a first volume, and movement of the plunger is configured to expose the second colored portion as the fluid reservoir discharges liquid. A housing of the device may include a first shell including a female snap and a second shell including a male snap. The female snap includes a female annular projection, a female snap undercut, and a central locking feature. The central locking feature is received within a male annular projection to extend from the first shell to an axial position closer to a distal end of the female annular projection than the female snap undercut.

The present invention discloses a small-displacement flexible piston compressor, comprising a compressor cavity, a swash plate disposed within the compressor cavity, a multi-stage compressor connected to the slanted end of the swash plate, and a main shaft connected to the flat end of the swash plate. In the multi-stage compressor, each stage includes a cylinder, an intake valve, an exhaust valve, a gas piston, a liquid piston, a piston rod, a ball joint connecting rod, a refill valve assembly, a relief valve assembly, a waste liquid one-way valve, and a liquid inlet control valve. The gas piston, liquid piston, and piston rod within the cylinder are sequentially connected from top to bottom, and the piston rod is connected to the swash plate via a ball joint connecting rod. The present invention overcomes the problems of complex structure, large volume and weight caused by the separate hydraulic and gas compression structures in conventional ionic liquid compressors. The hydraulic and gas compression devices are placed within a single cylinder, and the swash plate mechanism drives the device to reciprocate, significantly simplifying the structural complexity and control difficulty, while also facilitating multi-stage compression.

The application discloses a kind of heat pump energy storage systems and methods coupled liquid piston, including sequentially connected energy storage compressor, hot storage tank, first heat exchanger, first double-tank liquid piston, second heat exchanger, energy storage expander, cold storage tank and third heat exchanger;Third heat exchanger connects energy storage compressor;It further includes sequentially connected cold storage tank, energy release compressor, first buffer heat exchanger, hot storage tank, energy release expander, second buffer heat exchanger, second double-tank liquid piston and fourth heat exchanger, and the outlet of fourth heat exchanger is connected to cold storage tank;First double-tank liquid piston and second double-tank liquid piston are the same structure;Further compression is carried out to hot storage tank outlet normal temperature high pressure gas using liquid piston, the expansion ratio of energy storage expander is improved, the outlet temperature of energy storage expander is reduced, not only the quality of cold storage tank storage cold energy is improved, but also the round trip efficiency of system is improved, by compressing the gas at the outlet of energy release expander, the expansion ratio of energy release expander can be improved.

The application discloses a double-shell near-isothermal compressed air energy storage system coupled with solar energy and an operation method thereof. The system combines the advantages of compressed air energy storage, an ejector, a double-tank liquid piston, a heat accumulator and solar light heat, uses the exhaust heat after energy release, the solar light heat stored in the gap between energy storage and energy release and the heat accumulator heat after energy release to heat air as insulation gas to insulate air in the double-shell air storage tank, reasonably uses the exhaust heat after energy release, realizes step-by-step utilization of energy, reasonably uses the heat stored in the gap between energy storage and energy release and the heat accumulator, reduces heat loss of the heat accumulator during the period, improves the output stability of the system in the later energy release stage and the insufficient light period, reduces the cost of the air storage chamber, solves the problems of the exhaust heat in the existing compressed air energy storage system, the economy of the air storage chamber, the heat loss in the air storage process in the air storage chamber, the energy storage density and the low density of the compressed air energy storage system.

The invention belongs to the technical field of pressure detection, and discloses a liquid piston type pressure gauge and an operation method thereof. Wherein the liquid piston type pressure gauge comprises a pressure pipeline, a connecting joint, a pressure regulating pump, a piston weight assembly and an oil cup; wherein one end of the pressure pipeline is provided with a vacuum valve, and the other end is provided with a connector; the connecting joint comprises an inner interface and an outer interface; when the inner connector and the outer connector relatively rotate to a first preset position, the first inner connector fixing and mounting hole is aligned with the first outer connector fixing and mounting hole, so that the inner connector and the outer connector are detachably and fixedly mounted through an external fixing and mounting part, and the inner connector vent hole is aligned with the outer connector vent hole, so that exhaust is achieved; the connector is further provided with a sealing device. According to the technical scheme disclosed by the invention, the measurement precision can be remarkably improved; furthermore, flexible expansion of the measuring range can be realized, and wide-measuring-range coverage is achieved.

The invention discloses a combined hydrogen production and fused salt heat storage coupled afterburning type isothermal compressed air energy storage system and a variable working condition operation method thereof, and the system consists of a single-stage compression module, a liquid piston isothermal compression unit, a gas storage chamber, a multi-stage expansion unit, a fused salt heat storage system, a hydrogen afterburning module and a water electrolysis hydrogen production subsystem, dynamic air supply control, frequency modulation response prediction and multi-path energy release operation strategies are fused. A plurality of gas supply points are arranged on the first expansion machine, the fourth expansion machine and the fifth expansion machine, the gas supply position and flow are dynamically adjusted through the central controller, hydrogen afterburning and fused salt heat release are matched, millisecond-level frequency response and large-amplitude power adjustment are achieved, and the system has the advantages of zero carbon emission, high heat efficiency, scheduling flexibility and the like. The method is suitable for high-proportion new energy power grid frequency regulation and energy storage application scenes.

To provide a foam dispenser that can be set to dispense multiple types of discharge amounts of a content liquid.SOLUTION: A foam dispenser 1 includes: a base cap 10; a stem 20; a nozzle head 30; an air cylinder member 40; an air piston 50 that partitions an air cylinder chamber 47 inside the air cylinder member 40; a liquid cylinder member 60; and a liquid piston 70 that partitions a liquid cylinder chamber 73 inside the liquid cylinder member 60. The liquid cylinder member 60 is formed separately from the air cylinder member 40 and mounted on the air cylinder member 40, and by using one of several types of liquid cylinder members 60 having different inner diameters dc, and using the liquid piston 70 corresponding to a liquid cylinder wall 61 of the mounted liquid cylinder member 60, the dispenser is configured to set multiple types of discharge amounts of a content liquid.SELECTED DRAWING: Figure 1

This application discloses an anti-backflow atomizing nozzle and a diffuser device, relating to the field of aromatherapy equipment. The anti-backflow atomizing nozzle includes a nozzle body and a piston. The nozzle body has a gas channel and a liquid channel. The gas channel includes an air inlet and a first air outlet, and the liquid channel includes a liquid inlet and a liquid outlet. The first air outlet outputs flowing gas to create a negative pressure at the liquid outlet and atomize the liquid output from the liquid outlet. The piston is slidably and sealingly installed in a piston chamber. When the anti-backflow atomizing nozzle is in a first state, the piston disconnects the connection between the first air outlet and the liquid outlet. When the anti-backflow atomizing nozzle is in a second state, the piston moves under the action of flowing gas output from the second air outlet, connecting the first air outlet and the liquid outlet. The anti-backflow atomizing nozzle provided by this application can prevent volatile essential oils from entering the air pump when not in operation.

The invention relates to a method for compressing and / or expanding a gas by means of a liquid piston device comprising: at least two cylinders (10, 10 '); a liquid line (21) interconnecting the cylinders (10, 10 '); a liquid drive unit (20) by means of which a fluid (14) can be conveyed from one cylinder (10, 10 ') to the other cylinder (10, 10'); a low-pressure gas reservoir (40) connected to each cylinder (10, 10 ') via a low-pressure line (41); low-pressure valves (11, 11 ') for the respective cylinders (10, 10'), by means of which low-pressure lines (41) leading to the cylinders (10, 10 ') can be opened and closed; a high-pressure gas reservoir (50) connected to each cylinder (10, 10 ') via a high-pressure line (51); and high-pressure valves (12, 12 ') for the respective cylinders (10, 10'), by means of which high-pressure lines (51) leading to the cylinders (10, 10 ') can be opened and closed.

The grouped mechanical liquid piston heat pump (1) comprises a blind liquid cylinder (8) of compressors in which a double-acting hydraulic piston (10) of compressors translates to form a first and a second compressor hydraulic variable volume (12, 134), and a blind liquid cylinder (30) of expanders in which a double-acting hydraulic piston (39) of expanders translates to form a first and a second expander hydraulic variable volume (44, 46), said hydraulic variable volumes (12, 134, 44, 46) communicating with compressor and expander gas and liquid reservoirs (14, 29, 50, 55) in which compressor and expander heat exchange and accumulation means (16, 59, 139, 70) are housed, this to form a compressor (3) and an expander (4).

A method and system for generating vapor or steam are provided where steam is generated using thermal energy largely from the liquid's own thermal energy. The system being a thermo- and hydrodynamic oscillator where steam is formed by intentionally having an unstable column of water drop, generating low-pressure steam in its wake, having the column overshoot and in its return motion using the column as a liquid piston or column that compresses, heats and finally ejects the newly formed steam. The system includes an actuation system that is configured to modulate, assist, initiate or sustain oscillatory motion of the liquid piston or column. The system may include an initiation valve for interrupting a flowing liquid and forming a liquid piston or column therefrom.