145results about How to "Avoid going out" patented technology

The invention relates to a spring operating mechanism matched with a 126kV vacuum high-voltage circuit breaker, the invention designs the contour trajectory of a cam to achieve the best match of the output characteristics and the load characteristics; when in closing process, the speed at instant of touching is controlled in the reasonable range to effectively reduce the closing bounces, and the mechanism can also be ensured to overcome the reaction force of a contact spring at the end of the closing; the design of the size and the position of an oil drain hole on a wall of a buffer can allow the circuit breaker to ensure higher speed at instant of touching during the opening process to allow an arc-extinguishing chamber to rapidly enter the short arcing time, thus allowing the average speed to be maintained within a certain range, ensuring the long arcing time of the circuit breaker and further being conductive to the arc extinguishment; the spring operating mechanism can solve the problem of poor match of the output force of the mechanism in the past with the load characteristics of the vacuum circuit breaker, reasonably distribute energy to the overall motion process of the circuit breaker and reduce the opening and closing works of the mechanism.

The invention provides a method for reinforcing an in-situ combustion exploitation oil reservoir. The method comprises the steps that an injection-production pattern is deployed; a heating device is tripped in an injection segment of an injection well shaft, and started for heating; manganese dioxide is injected into the injection well shaft, the injection speed of the manganese dioxide is 0.01-50 tons per day, and the injection amount of the manganese dioxide is one ton to 50 tons; potassium chlorate is injected into the injection well shaft, the injection speed of the potassium chlorate is 0.01-50 tons per day, and the injection amount of the potassium chlorate is four tons to 50 tons; air is injected into the injection well shaft, and the injection speed of the air is 10,000-15,000 Nm3 per day; an oil layer is combusted and kept combusted; continuous oil extraction is carried out through a production oil; in the production process, the temperature of the oil layer and the temperature of fluid produced by the production well are monitored, and when it is monitored that the maximum temperature of the combustion area of the oil layer is lowered by more than 50 DEG C, the temperature of the fluid produced by the production well is lowered by more than 30 DEG C, and manganese dioxide, potassium chlorate and oxygen are injected to an injection end again.

The invention relates to an inner ring fire cover of a gas combustor. The inner ring fire cover of the gas combustor comprises a fire cover body with an opened upper part, and a cover body covering amouth part of the fire cover body; an inner ring gas mixing cavity is formed between an inner peripheral surface of the fire cover body and the cover body; fire outlet holes are distributed in the peripheral direction of the side wall of the fire cover body; all the fire outlet holes communicate with the inner ring gas mixing cavity; the peripheral edge of the cover body is outwards projected on the fire cover body in the horizontal direction; and the bottom of at least part of the peripheral edge downwards extends to form a waterproof edge. Compared with the prior art, when overflowing liquidflows to the peripheral edge of the cover body, the overflowing liquid can flow and drip along with the waterproof edge, so that the overflowing liquid is prevented from flowing into the fire outletholes, the flame extinction is prevented, the overflowing liquid is prevented from blocking the fire outlet holes, and stable, efficient and uniform combustion is guaranteed.

The invention discloses an underground fuel gasification method, a gasifying agent delivery pipe and an underground fuel gasification system. The underground fuel gasification method comprises the steps of respectively and continuously delivering water and combustion-supporting gas to an underground fuel gasification reaction zone, atomizing the water delivered to the underground fuel gasification reaction zone by using pressure potential energy of water from the ground to the underground, mixing water vapor produced after atomization with the combustion-supporting gas delivered to the underground fuel gasification reaction zone to form mist gasifying agent, and producing fuel gas through gasification reaction between the mist gasifying agent and the underground fuel in the underground fuel gasification reaction zone by combustion and heating. The gasifying agent delivery pipe comprises a water delivery pipe and a gas delivery pipe. The underground fuel gasification system comprises an underground gasification furnace, the gasifying agent delivery pipe and an atomizing and mixing nozzle. The water and combustion-supporting gas can be mixed in the underground fuel gasification reaction zone to form the mist gasifying agent without using heat, the normalization and stabilization of the underground gasification process are realized, and the production cost is greatly reduced.

A lighting control device for a vehicle lighting device is arranged so that loads applied to switching regulators are about equal when driving multiple semiconductor light sources (e.g., LEDs) as multifunctional lamps through the switching regulators. The LEDs are divided into two groups. The LEDs belonging to the first group are driven to be turned ON through a first switching regulator and the LEDs belonging to the second group are driven to be turned ON through a second switching regulator. Maximum values of power to be supplied to the LEDs are set to be about equal to each other, and loads to be applied to the switching regulators are about equal to each other.

A discharge lamp lighting circuit 1 includes a direct current-alternating current converting circuit 3 , a starting circuit 4 , controlling means 15 for controlling power, switching elements 5 H, 5 L driven by the controlling means 15 and a series LC resonance circuit ( 7 p , 8, 9 ). A frequency modulating circuit is provided for restraining acoustic resonance by modulating a frequency of driving the switching element. When a basic frequency related to the drive frequency is equal to or higher than 1 MHz, a modulation width is set to be equal to or higher than 20 kHz.

The invention relates to a moxa-moxibustion box comprising a cylindrical housing and a holder arranged in the housing; the housing is at least divided into an upper cavity positioned in the most top of the housing and a lower cavity positioned in the most bottom of the housing; the holder is provided with through holes, or is a netted structure, or a hollow structure; the upper and lower cavities are mutually connected. The moxa-moxibustion box is simple in structure, low in cost, better in moxibustion effect, and stronger in practical value.

The invention provides an intelligent building protection method based on a unmanned aerial vehicle and information sharing, and a system thereof. The intelligent building protection method based on aunmanned aerial vehicle and information sharing comprises the following steps that: the control center receives a protection start command and controls the wind power detector to acquire wind power information and controls the first camera to capture a first image ; the control center analyzes whether the current wind power level exceeds a preset wind power level, the control center controls theprotection unmanned aerial vehicle to start and controls the second camera to capture a second image if the current wind power level exceeds the preset wind power level; the control center controls the protection unmanned aerial vehicle to release the connection with the connection mechanism and controls the protection unmanned aerial vehicle to fly away from the unmanned aerial vehicles warehouse; the control center controls the protection unmanned aerial vehicle to travel to the protection area and controls a fixed telescopic pillar driven by and connected with a first fixing motor of the protection unmanned aerial vehicle to extend out to resist and fix with a first fixing groove; the control center controls a first splicing plate driven by and connected with a first splicing motor of the protection unmanned aerial vehicle to extend out to resist and fix with a first splicing groove and controls a first exhaust hole and a second exhaust hole to be opened; and the control center controls the exhaust passage to be opened.

The invention discloses a segmental fire power adjusting device. The segmental fire power adjusting device comprises a gas stove body and a turn button. The turn button can control opening and closing of the gas stove and adjusting fire power; a rotary rod of the turn button is located in the gas stove body; the operation mode of the segmental fire power adjusting device is identical to a conventional operation mode in an ignition state; and the segmental fire power adjusting device exerts adjusting effect after normal ignition and operation are confirmed. The segmental fire power adjusting device also comprises a control unit capable of adjusting the turn button to a designated area after normal working of igniting flames and allowing the rotation speed of the turn button to be in a segmented form. After normal working of the igniting flames, the turn button rotates segment by segment in virtue of the segmental control unit instead of conventional resistance-free smooth rotation; as the segmental control unit brings resistance to rotation of the turn button, rotation of the turn button is decelerated, so uniform temperature of flames in the inner and outer rings of the gas stove is guaranteed when fire power is turned down along a clockwise direction, flame extinction is prevented, and normal usage of the gas stove is ensured.

The invention relates to a gas stove. The gas stove comprises a switch valve, wherein the switch valve comprises a valve body and a valve element rotatably arranged inside the valve body; the valve element is internally provided with an air inlet passage communicated with an air source; an inner ring fire air outlet hole and an outer ring fire air outlet hole penetrating through the side wall are formed in the side wall of the valve element, wherein the valve body, corresponding to the inner ring fire air outlet hole, is provided with an inner ring main air outlet passage and an inner ring fine tuning passage, and the valve body, corresponding to the outer ring fire air outlet hole, is provided with an outer ring main air outlet passage and an outer ring fine tuning passage. During the process of adjusting heat power, after the outer ring main air outlet passage and the outer ring fire air outlet hole are staggered, the outer ring fine tuning passage supplies gas continuously in a certain angle rotation range; after the inner ring main air outlet passage and the inner ring fire air outlet hole are staggered, the inner ring fine tuning passage supplies gas continuously, so that the whole gas flow control curve becomes more gentle, and the heat power of the gas stove is convenient for a user to control accurately.

The invention discloses a dust explosion experimenting device, and relates to the technical field of manufacturing of experiment teaching aids. The dust explosion experimenting device comprises a tank body with a cover body at a tank opening, and a dust container arranged inside the tank body and communicated with an air pump, wherein a partition board is arranged at the inner bottom of the tank body and at a position close to the tank wall; the partition board and the inner wall of the tank body surround the dust container; a combustion vessel is arranged on one side, with the dust container, of the tank body. Compared with the prior art, the dust explosion experimenting device has the advantage that the explosion experimenting device can solve the problem that the existing dust explosion experiment is low in success rate.

The present invention relates to a circuit arrangement for operation of a discharge lamp, comprising: an input having a first input connection (E1) and a second input connection (E2) for connection of a supply voltage; a first electronic switch (Q1), which has a control electrode, a working electrode and a reference electrode, wherein the working electrode is coupled to the first input connection (E1); a first diode (D1), the anode of which is coupled to the second input (E2) and the cathode of which is coupled to the reference electrode of the first electronic switch (Q1) to form a first junction point (N); a control apparatus (12), which is coupled to the control electrode of the first electronic switch (Q1) in order to drive said first electronic switch (Q1); an output with a first output connection (A1) and a second output connection (A2) for providing an output voltage (UA) to the discharge lamp (La); an inductance (Lz), which is arranged in series with one of the output connections (A1; A2); a lamp inductor (L1), which is coupled between the first junction point (N) and the first output connection (A1); and a first capacitor (C1), which is coupled between the first output connection (A1) and the anode of the first diode (D1); wherein the control apparatus (12) is designed to switch the first electronic switch (Q1) on continuously for a switched-on time and to switch it off continuously for a switched-off time; wherein the circuit arrangement furthermore comprises a voltage measurement apparatus (10) for measuring the output voltage (UA), wherein the voltage measurement apparatus (10) is designed to produce at its output a signal which is correlated with the measured output voltage (UA) wherein the voltage measurement apparatus (10) is coupled to the control apparatus (12) in order to transmit this signal to the control apparatus (12), and wherein the control apparatus (12) is designed to vary the switched-off time (Toff) as a function of the measured output.

The invention discloses a deep sea net cage fish crossing prevention device. The device comprises an annular floating plate, wherein a net cage is arranged at the lower end of the annular floating plate, a plurality of fixing rods are fixed to the upper end of the annular floating plate, a protective net is arranged on the outer sides of the fixing rods, a pair of cross plates is fixed to the upper inner wall and the lower inner wall of the annular floating plate, a rotating shaft is rotatably connected between the inner walls of the middles of the cross plates, four pull rods hidden between the cross plates are fixed to the outer wall of the rotating shaft, a blocking net is arranged between the pull rods and the inner walls of the cross plates, one side of the blocking net is fixed to the side walls of the pull rods, the other side of the blocking net is fixed to the inner walls of the cross plates, four arc-shaped cavities are arranged in the annular floating plate, first pistons are arranged in the arc-shaped cavities, and magnetic blocks are fixed to the side walls of the first pistons. The device is reasonable in structure, a cage opening of the deep sea net cage can be automatically shielded through the blocking net in strong wind and strong wave weather, meanwhile, the height of the protective net is increased, and therefore the situation that cultured fishes cross thenet is avoided.

The invention discloses a cleaning device for attachments outside a deep sea net cage. The cleaning device comprises an annular floating plate and a box body, wherein an annular ventilation duct is fixed at the upper end of the annular floating plate; a plurality of ventilation pipes are arranged on the side wall of the annular ventilation duct at equal intervals in the circumferential direction;the ventilation pipes are obliquely arranged; wind shields are arranged at pipe openings of the ventilation pipes; a rotating ring is arranged in the annular ventilation duct; a plurality of fan blades are fixed on the outer wall of the rotating ring at equal intervals in the circumferential direction; an annular opening is formed in the bottom in the annular ventilation duct; a plurality of device plates penetrating through the annular opening are fixed at the bottom of the rotating ring; sliding grooves are formed in the side walls of the upper ends of the device plates; elastic mechanisms are arranged in the sliding grooves; the side walls of the device plates are connected with cleaning brushes connected with the elastic mechanisms in a sliding mode; and a plurality of strong magneticblocks are fixed at the bottom of the annular ventilation duct at equal intervals in the circumferential direction. The cleaning device is reasonable in structure, can automatically drive the cleaningbrushes to brush the surface of the box body in strong wind weather, and is good in cleaning effect.

The invention discloses a comprehensive environmentally-friendly multifunctional sewage treatment system. A water volume and water quality adjusting pool D can conduct primary filtering conveniently on sludge and large impurity particles, is good in filtering treatment effect, and can conduct circulating filtering treatment on sewage. A hydrolytic acidification reacting pool E can improve the mixed contact effect of microorganisms and wastewater, and the reaction effect can be stabilized; sludge discharging and feeding can be conducted conveniently; wastewater can be input quantitatively. A waste gas treatment device B can clear off hydrogen sulfide, carbon monoxide and methane without manual feeding. A / O biochemistry pool G is arranged, so that the area occupied by a device is reduced, and the sludge is convenient to recycle and utilize. An aerating device C can realize single driving and multiple purposes, reduce energy losses, and conduct sufficient aeration on sewage. A chlorine dioxide generator A can liquefy, conveniently store and transport chlorine dioxide, operation and control are convenient, and manufacturing costs are low.

The invention discloses a control method and a control device of deep peak shaving boiler and a thermal power generation system. The control method and the control device are applied to a boiler witha 600 MW thermal power generation system, and specifically comprises the following steps that when the boiler enters a low-load operation state, the lignite is put into a furnace to serve as a main raw material of the furnace; a primary air flow of the inlet furnace is strictly controlled, and the primary air flow is controlled to be 100t / h or below. Through the above measures, the fuel put in thefurnace can be supplied stably, continuous combustion can be guaranteed, sufficient heat can be continuously released to maintain the temperature in the furnace, and unnecessary heat loss can be further reduced, the temperature in the furnace cannot be reduced, so that the boiler can be stably combusted during the low-load operation period, and the combustion in the furnace can be prevented frombeing extinguished due to instability.

PURPOSE: An exhaust gas reducing apparatus is provided to stably maintain the temperature of exhaust gas as the flame in a second combustion chamber is rapidly ignited even in the case the flame in a first combustion chamber is extinguished. CONSTITUTION: An exhaust gas reducing apparatus comprises an exhaust pipe(100), first and second combustion units, an injection nozzle(300), first and second igniters, and an air feeder(600). The exhaust pipe delivers exhaust gas to an exhaust gas filter(F). The first combustion unit is installed inside the exhaust pipe, and placed between an engine and the exhaust gas filter. The first combustion chamber comprises a first combustion chamber(211). The injection nozzle is mounted into the first combustion unit, and injects a mixture mixed with air and fuels to the first combustion chamber. One end of the first igniter is placed inside the first combustion chamber, and ignites the mixture injected from the injection nozzle. The second combustion unit comprises a second combustion chamber(521) connected to the first combustion chamber. The air feeder supplies the air to the second combustion chamber. One end of the second igniter is placed inside the second combustion chamber.

The invention discloses an LED backlight which comprises a boost circuit, N shunt-wound LED strings, a backlight driving integrated circuit, and N control circuits, wherein the boost circuit is used for boosting input DC voltage and outputting the boosted DC voltage; each LED string comprises a plurality of LEDs connected in series and is used for receiving the boosted DC voltage from the boost circuit; the backlight driving integrated circuit is used for controlling the make-and-break of the boost circuit and judging whether other LED strings are closed or not according to that whether the voltage of the negative terminal of any one LED string is zero; and each control circuit controls the voltage of the negative terminal of the LED string corresponding to the control circuit not to be zero so as to enable the backlight driving integrated circuit not to close other LED strings except the LED string. According to the LED backlight provided by the invention, when any one LED string is an open circuit, the backlight driving integrated circuit can not close any other LED strings except the LED string, that the N LED strings are extinguished completely is avoided, and the LED backlight can continue to provide a display light source. The invention further provides a liquid crystal display device provided with the LED backlight.

The invention provides a plasma processing method. The plasma processing method comprises that a first frequency is obtained in advance, and the first frequency is the output frequency of a frequency-variable power source when the frequency-variable power source matches the impedance of a reaction chamber in the first plasma processing process; a second frequency is obtained in advance, and the second frequency is the output frequency of the frequency-variable power source when the frequency-variable power source matches the impedance of the reaction chamber in the second plasma processing process; first plasma processing is carried out on a substrate to be processed, and at the same time, an external control unit sets the output frequency of the frequency-variable power source as the first frequency so that the frequency-variable power source matches the impedance of the reaction chamber; and second plasma processing is carried out on the substrate to be processed, and at the same time, the external control unit sets the output frequency of the frequency-variable power source as the second frequency so that the frequency-variable power source matches the impedance of the reaction chamber. The plasma processing method can keep plasma stable and avoid plasma from quenching.

The invention belongs to the technical field of efficient biomass energy utilization, and particularly relates to a special high-temperature biomass gas combustor. The special high-temperature biomass gas combustor comprises a first pipeline. The first pipeline comprises two layers, the outer layer is a first combustion improver pipeline, the inner layer is a gas pipeline, and an interval for a first combustion improver to pass is arranged between the outer layer and the inner layer. An ignition device is arranged in the gas pipeline. The first pipeline is sleeved with a second pipeline. An interval is formed between the side wall of the first pipeline and the side wall of the second pipeline. The length of the first pipeline is smaller than that of the second pipeline. An air inlet is formed in the right end of the first pipeline, and an air outlet is formed in the left end of the first pipeline. One end of the second pipeline is of a sealed structure and is fixedly connected with the air inlet of the first pipeline. The side wall of the second pipeline communicates with a gasification furnace through a pipeline. The second pipeline is further sleeved with a closed first cavity. The exterior of the first cavity is connected with a second combustion improver pipeline, and the second pipeline is provided with a plurality of through holes communicating with the first cavity. By means of the special high-temperature biomass gas combustor, the length and the temperature of flames can be adjusted, running is stable and reliable, and few pollutants are discharged.

The invention relates to the field of processing of tea leaves, in particular to green tea fixation equipment. The green tea fixation equipment comprises a machine frame, a supporting mechanism arranged on the machine frame, a fixation pot which is hinged to the supporting mechanism and can horizontally swing, a fixation oven arranged under the fixation pot, a fuel gas tank for supplying gas to the fixation oven, and a driving mechanism which is connected with the fuel gas tank and can drive the fixation pot to horizontally swing, wherein the driving mechanism is arranged on the machine frame;the fuel gas tank can drive the driving mechanism, and fuel gas is transported into the fixation oven by the driving mechanism; the top shape of the fixation oven cooperates with the bottom shape ofthe fixation pot; and elastic blocks which can bounce the fixation pot are arranged at the top of the fixation oven. The ignition of the fixation oven and the sloshing of the fixation pot are completed through the fuel gas, and then the up-and-down motion of the fixation pot is completed through cooperation of the dead weight of the tea leaves with springs and the elastic blocks. The green tea fixation equipment disclosed by the invention is good in linkage and simple in structure, tea leaves cannot produce physical collision, under the situation that the tea leaves are not damaged, uniform fixation is performed on the tea leaves, and the quality of the tea leaves is guaranteed.

The invention discloses a portable double-layer parking device. The portable double-layer parking device comprises a supporting mechanism, a lower-layer parking plate, an upper-layer parking plate andconnecting mechanisms, wherein the lower-layer parking plate is arranged on the inner side of the lower end of the supporting mechanism; the upper-layer parking plate is installed above the lower-layer parking plate in parallel; the connecting mechanisms are welded to the edges of the left side and the right side of the right end of the upper-layer parking plate; a deceleration strip is tightly attached to the upper surface of the lower-layer parking plate; and a first hydraulic cylinder is arranged on the edge of the upper surface of the lower-layer parking plate. According to the portable double-layer parking device, the deceleration strip is positioned on the rear half section of the lower-layer parking plate, so that when rear wheels of a vehicle press over the deceleration strip, a driver can be reminded that the vehicle needs to be parked in time through the arrangement of the deceleration strip, the rear wheels of the vehicle are prevented from exceeding the lower-layer parkingplate, a slope surface is used for preventing the rear wheels of the vehicle from sliding out of the upper-layer parking plate, and secondly, when the slope surface and an anti-skid rubber pad intercept the rear wheels of the vehicle, the rear paint surface of the vehicle cannot be scratched and damaged.

The invention discloses an intelligent voice broadcasting system for an elevator. The intelligent voice broadcasting system comprises a motion detection module used for detecting the running state ofthe elevator, a controller module used for judging the ascent or descent of the elevator and the current floor number and improving the accuracy of judging the floor number and a voice broadcasting module used for voice-broadcasting the ascent or descent of the elevator and the number of the floor at which the elevator arrives. The motion detection module and the voice broadcasting module are correspondingly connected to input / output interfaces of the controller module, and the controller module controls the voice broadcasting module to realize voice broadcasting after receiving and processingdata information sent from the motion detection module. According to the intelligent voice broadcasting system for the elevator, the intelligent voice broadcasting system for the elevator is designedwithout changing an original control circuit of the elevator, the whole system is placed in a personalized box body and installed on the inner wall of an elevator car by using a vacuum sucker, the elevator ascent or descent and the number of the floor at which the elevator arrives can be judged, and voice broadcasting can be carried out.

The invention discloses an earphone which employs a bone conduction technology and has an alarm function. The earphone comprises an earphone connection arm, wherein a time delay circuit, an MCU controller and a drive circuit are arranged in the earphone connection arm. The earphone also comprises an LED display module and a light sensor. The LED display module comprises at least one LED lamp. The LED lamp and the light sensor are arranged at the outer side of the earphone connection arm. After a key switch controls the whole system to be started, the MCU controller starts working, the circuit is switched on, when a user wears the bone conduction earphone to run, the light sensor automatically senses light and transmits light information to the time delay circuit, the MCU controller and the drive circuit in sequence, and the LED lamp in the LED display module is lightened, thereby alarming a vehicle behind the user. Through application of the mode, the problem that a safety accident occurs due to the fact that the light is relatively dark and a car driver is difficult to discover the user when the user runs or walks at night is solved.

The invention discloses a combustible special mosquito-repellent incense box which is characterized in that a box body has two opposite side surfaces, namely, a box body left side surface and a box body right side surface, the box left side surface extends toward the inside of the box body to form an upward left opening shape, the bottom of the left opening shape is hollowed, the right end surface of the left opening shape is a vertical surface, a plurality of small bulges are arranged on the inner side of the vertical surface, the box right side surface extends toward the inside of the box body and penetrates through the opening of the lower part of the right end surface of the left opening shape to form an upward right opening shape, the bottom of the right opening shape is hollowed, the left end surface of the right opening shape is a vertical surface, a plurality of small bulges are arranged on the inner side of the vertical surface. The combustible special mosquito-repellent incense box has the advantages that the mosquito-repellent incense can be utilized to the maximum extent by the aid of the mosquito-repellent incense box design, remaining mosquito-repellent incenses with different shapes can burn sufficiently, at the same time, the use process is very simple, the user experience is excellent, cleaning is easy, the structure is simple, and the cost is low.

The invention discloses a particle combustion furnace, and belongs to the field of combustion equipment. The problems that in the prior art, the situation of backfire possibly happens to a combustor from a feed port in a big fire state, and the situation that primers are hard to maintain and are extinguished is prone to happening in a small fire state are solved. According to the main technical scheme for solving the problems, a combustor is arranged in a furnace body, the top end of the combustor is open, a feeding port is formed in the side wall of the combustor, a through port used for air inlet and ash falling is formed in the bottom face of the combustor, a fire grate used for supporting particle fuel is arranged above the through port, an auxiliary supporting body used for maintaining primers is arranged below the fire grate, the auxiliary supporting body is higher than the through port, the auxiliary supporting body is located on one side below the feeding port, and the set range does not exceed 1 / 2 of the area covered by the fire grate. The particle combustion furnace is mainly used for achieving the aims that backfire is not prone to happening to the feeding port in a big fire state, and extinguishing can be avoided in a small fire state.

The invention relates to a free piston device and to a method for operating same, comprising a piston (42) which is arranged such that it can move back and forth along an axis (26). The piston receptacle (24) comprises or forms a combustion chamber (50) which is delimited by a wall (32) and which has at least one inlet opening (34, 80, 86, 88, 90) for supplying fresh gas and, at an axial distancetherefrom, at least one outlet opening (36) for discharging exhaust gas. The free piston device (10) comprises an inflow device (78) for fresh gas, said inflow device having the at least one inlet opening (34, 80, 86, 88, 90) and being designed such that fresh gas flowing into the combustion chamber (50) is directed towards an inflow region (84), which is axially offset relative to the at least one inlet opening (34, 80, 86, 88, 90) in the direction of the at least one outlet opening (36), in the combustion chamber (50), said inflow region being arranged off-center relative to the axis (26).