1814 results about "Gas stoves" patented technology

The invention relates to the technical field of kitchen safety monitoring, and discloses a kitchen gas stove abnormity early warning system based on infrared thermal imaging multispectrum. The system comprises an infrared thermal imaging acquisition module, a dynamic feature extraction module and an abnormal behavior identification module. The infrared thermal imaging acquisition module synchronously captures the surface temperature field distribution of the gas cooking range through a multispectral infrared sensor array, obtains flame form data in combination with a visible light image, and generates a multi-channel fused infrared thermal imaging characteristic spectrum through processing. The dynamic feature extraction module adopts a three-dimensional convolution kernel to scan continuous time sequence frames, identifies flame morphological feature differences, calculates thermal radiation intensity energy distribution offset, and outputs dynamic feature vectors. The abnormal behavior recognition module extracts a correlation mode through a deep residual network, compares current features with a historical normal working condition feature library, and generates a preliminary early warning signal containing an abnormal type code and a risk level when the attenuation rate of flame spectral energy in a specific infrared band exceeds a first threshold value.

The invention belongs to the technical field of household gas stoves, and provides a household infrared stove with high heat intensity and a design method.The stove comprises a valve body and an infrared burner which are sequentially arranged in the airflow direction; according to the valve body, the two independent channels of the main fuel gas channel and the auxiliary fuel gas channel are matched with the main nozzle and the auxiliary nozzle to form a two-strand collision jet flow injection technology, an infrared injection pipe of the infrared burner and the main nozzle are coaxially arranged, and the infrared injection pipe and the auxiliary nozzle are of a non-coaxial structure, so that the injection capacity of the main nozzle is guaranteed, and the service life of the main nozzle is prolonged. The fuel gas injected by the auxiliary nozzle directly rushes to the inner wall of a shrinkage pipe in the infrared injection pipe, and the two jets are injected together; compared with a traditional single-nozzle ejection structure, the amount of ejected air is larger, gas and air are mixed more evenly, the ejection speed of the gas through fire holes of the infrared burner is higher, and the combustion stability is further enhanced in cooperation with the design of the infrared burner and the infrared radiation combustion plate.

The utility model discloses an energy-gathering plate pot rack and a gas cooker, and belongs to the technical field of kitchen appliances. The energy-gathering disc pot rack comprises an energy-gathering disc body, a center through hole used for avoiding a burner is formed in the energy-gathering disc body, the inner diameter of the center through hole is larger than the outer diameter of the burner, so that a secondary air supplementing inlet can be formed between the energy-gathering disc body and the burner in the assembled state, and a secondary air preheating cavity distributed around the center through hole is formed in the energy-gathering disc body; the secondary air preheating cavity is communicated with the secondary air supplementing inlet, a secondary air inlet communicated with the secondary air preheating cavity is formed in the energy gathering disc body, and the upper surface of the energy gathering disc body is made of glass with the melting point higher than the combustion temperature of the gas cooker. And the fully preheated secondary air participates in combustion, so that the temperature field of the high-temperature flue gas can be effectively enhanced, the heat exchange effect with the bottom of the boiler is enhanced, and the combustion heat efficiency is improved.

The invention discloses a gas cooker which comprises a combustor and an ejector, the combustor is provided with a premixing cavity, the premixing cavity is communicated with external gas supply through the ejector, a fire cover is arranged on the premixing cavity in a covering mode, the gas cooker is characterized by further comprising an energy gathering disc, a mounting opening is formed in the middle of the energy gathering disc, and the energy gathering disc is provided with a gas inlet and a gas outlet. The combustor is arranged at the position of the mounting opening in a penetrating mode, and a heat insulation cavity and a preheating cavity are sequentially defined by the energy gathering disc from top to bottom; the air outlet end of the air blower is communicated with the air inlet end of the preheating cavity; the nozzle seat is arranged on the ejector, a gas distribution channel is limited in the nozzle, one end of the gas distribution channel is communicated with the gas outlet end of the preheating cavity, and the other end of the gas distribution channel is communicated with the ejector. The energy-saving stove is simple in structure, heat emitted downwards can be fully utilized, and meanwhile the energy efficiency of the stove is effectively improved.

The invention relates to a gas stove control device with a fault detection function and a gas stove. The gas stove control device comprises a double-coil electromagnetic valve, a driving circuit, a detection circuit, a controller and an alarm. A main coil of the double-coil electromagnetic valve is connected with a thermocouple, a secondary coil of the double-coil electromagnetic valve is connected with the driving circuit, and the driving circuit is used for outputting driving current to the secondary coil; the detection circuit is connected with two ends of the secondary coil and is used for detecting voltages at two ends of the secondary coil; the controller is connected with the drive circuit, the detection circuit and the alarm and used for controlling on-off of the drive circuit and controlling the alarm to give an alarm according to the voltage, fed back by the detection circuit, of the two ends of the secondary coil. According to the invention, various faults such as open circuit, short circuit and turn-to-turn short circuit of the secondary coil are accurately identified based on the voltages at the two ends of the secondary coil, the alarm gives an alarm to remind a user in time when the fault of the secondary coil is detected, the sensitivity and accuracy of fault detection of the secondary coil are high, and the safety performance is high.

The invention provides a multi-interlayer energy-saving hearth used on a gas stove. In the prior art, a single-layer gas control basin or a welded double-layer gas control basin is used for improving the detection thermal efficiency, but the thermal insulation performance is poor, more heat is lost, and the thermal efficiency is reduced. The multi-interlayer energy-saving hearth comprises an outer hearth and an inner hearth, the outer hearth is in a big-end-up round sleeve shape, the outer hearth is arranged outside a burner of the gas stove in a sleeving mode, the bottom face of the outer hearth is placed on the stove face of the gas stove to be in a closed state, an outer hearth boss is machined on the upper portion of the interior of the outer hearth, and a plurality of outer hearth air inlet holes are evenly distributed in the lower face of the outer hearth along the circumference; the appearance of the inner chamber is in a basin shape with an inner chamber hole in the center, the inner chamber is arranged in the outer chamber, the periphery of the inner chamber is placed on the outer chamber boss, the inner chamber hole is close to the burner and is flanged upwards, and a gap between the inner chamber hole and the burner is used as an outer air supplement port for secondary air; and the pot rack consists of a pot rack ring and a plurality of pot rack legs and is arranged on the upper edge of the outer chamber. Through multi-aspect improvement, the thermal insulation performance and heat recovery are improved, the thermal efficiency is higher than that of various existing gas stoves, and the gas stove is easy to detach and wash.

The utility model provides a gas nozzle and a gas stove, and relates to the technical field of stoves. The gas nozzle comprises a nozzle body, a nozzle inlet and a nozzle outlet are formed in the two ends of the nozzle body respectively, and an injection cavity is formed in the nozzle body. The gas nozzle further comprises a zero-time injection hole, the zero-time injection hole penetrates through the nozzle body, and the two ends of the zero-time injection hole communicate with the injection cavity and the outside correspondingly. The included angle between the zero-time injection hole and the extending direction of the nozzle body is not larger than 90 degrees, the situation that the zero-time injection direction is perpendicular to the primary injection direction is avoided, then the situation that an air curtain hinders primary injection is avoided, meanwhile, the rotation inclination angle is set for the zero-time injection hole in the radial direction of the nozzle body, and therefore the zero-time injection hole better conforms to the air flowing direction, and the injection efficiency is improved. The loss of momentum and flow is reduced, zero-time injection and primary injection are matched to form a synergistic effect and promote each other, and the injection capacity is improved.

The invention provides an intelligent gas control method and system, and the method comprises the steps: judging whether there is no person beside a stove or not based on an identification sensor when the stove is disposed on a cooking bench; the method comprises the following steps: acquiring stove state information, determining a cooking type according to the stove state information, generating a safety early warning time length based on the cooking type, acquiring gas concentration within the safety early warning time length, and judging whether gas supply needs to be immediately and automatically cut off according to the gas concentration and the stove state information; if the fuel gas supply does not need to be cut off immediately and automatically, whether the fuel gas supply is cut off manually or not is recognized within the safety early warning duration, and if the fuel gas supply is not cut off manually, the fuel gas supply is cut off automatically after the safety early warning duration is reached. Through an intelligent and automatic gas control strategy, the safety problem caused by forgetting to turn off the gas stove during cooking is solved.

The invention relates to the technical field of gas stoves, and particularly provides a control method of a gas stove and the gas stove.The control method comprises the steps that in response to the fact that the gas stove is in a dry burning state, whether the gas stove is in a firepower adjusting state or not is determined based on firepower adjusting information of the gas stove; responding to the firepower adjusting state of the gas stove, and adjusting a dry burning judgment strategy of the gas stove; and controlling the gas stove to stop working in response to the situation that the gas stove is not in the firepower adjusting state. According to the control method provided by the invention, the judgment precision of the dry burning state can be improved.

The utility model relates to the technical field of gas stoves, and discloses a gas stove burner which comprises an upper component, a lower component is detachably mounted below the upper component, and the lower component is limited through a limiting component; the upper assembly comprises a furnace end body, a base is fixedly installed below the furnace end body, and a connecting cylinder is fixedly installed on the base. A pull ring is pulled backwards, at the moment, the pull ring drives a connecting disc to move backwards, a connecting steel rope pulls a square end plate outwards, two limiting clamping plates are far away from each other, a reset spring shrinks and becomes short, the two limiting clamping plates move out of the interior of an inserting groove, and therefore a connecting protrusion is not limited any more; therefore, the lower component can be simply and conveniently detached from the upper component.

The application relates to the technical field of gas stoves, in particular to a gas burner and an updraft combustion burner. The gas burner comprises a circumferentially arranged outer ring structure, which comprises an inner ring wall and an outer ring wall, the outer ring structure forms an outer ring flow channel and a mixing cavity which are communicated with each other; an outer ring ejection pipe arranged below the outer ring flow channel, the outlet of the outer ring ejection pipe is communicated with the mixing cavity; and a shunt plate buckled in the outer ring structure, the shunt plate is provided with a first shunt area and a second shunt area, the first shunt area is arranged above the outer ring flow channel in correspondence, and the second shunt area is arranged above the mixing cavity in correspondence. The updraft combustion burner comprises the gas burner. The technical problem that the gas and air of the updraft combustion burner are not mixed sufficiently and the performance of the combustion burner is affected is solved.

The invention discloses a household gas cooker pipe joint welding device, and relates to the technical field of laser welding equipment. The laser welding device comprises a base, a support is mounted at the top of the base, and a laser welding head is mounted at the top of the support; a rotating assembly is arranged at the top of the base and comprises a rotating column movably connected into the base and a first gear installed on the surface of the rotating column. According to the rotating assembly, a gear transmission structure is adopted to drive the supporting barrel and the machining table to rotate, multi-angle adjustment is achieved in cooperation with a driving motor and a speed reducer, a laser welding head can conduct surrounding welding on a pipe joint, and the problem of heat affected zone concentration of traditional fixed-angle welding is solved; the clamping assembly pushes a moving column to move upwards through mechanical linkage of a guide ring and a second pulley, three sets of clamping plates are pushed to move synchronously and horizontally, the guide ring and a spring reset structure which are obliquely designed are utilized, rapid centering clamping of a connector workpiece is achieved, and the problem of center deviation caused by stroke difference of an electric push rod is solved.

The utility model provides a safety gas valve which comprises a valve body, a gas inlet channel, a gas outlet channel, a lower installation cavity and an upper installation cavity are arranged in the valve body, a ball valve is arranged in the gas outlet channel, an electromagnetic valve assembly is arranged in the lower installation cavity, the electromagnetic valve assembly is connected with an induction device through an electric control device, and the induction device is connected with the ball valve. The upper mounting cavity is correspondingly arranged above the lower mounting cavity, a valve rod connected with the ball valve is in clearance sealing connection in the upper mounting cavity, a bouncing valve element assembly is arranged in the valve rod, and the lower end of the bouncing valve element assembly penetrates out of the ball valve and is arranged above the electromagnetic valve assembly; the gas stove is reasonable and compact in structure, circulation of the ball valve and the gas outlet channel is controlled by rotating the ball valve through the valve rod, circulation of the ball valve and the gas inlet channel is controlled through cooperation of the electromagnetic valve assembly, the induction device and the bouncing valve element assembly, gas leakage caused by misoperation under the condition that the gas stove is shut down accidentally and is unattended can be avoided, and the safety of the gas stove is improved. The use is safer.

The invention relates to the technical field of kitchen utensils, in particular to a burner and a gas stove. The burner comprises a gas distribution seat, a gas distribution pipe and a gas distribution pipe, the inner ring fire cover is mounted on the gas distribution seat, the inner ring fire cover is provided with an inner ring cavity communicated with the central gas inlet channel, the side wall of the inner ring fire cover is provided with an ignition hole and a fire retaining hole which are respectively communicated with the inner ring cavity, and the ignition hole and the fire retaining hole are distributed along the circumferential direction of the inner ring fire cover; wherein a brim is arranged on the side wall of the inner ring fire cover, the fire retaining hole is located below the brim, a flow blocking part is arranged below the fire retaining hole, the brim and the flow blocking part protrude out of the side wall of the inner ring fire cover, and the flow blocking part is configured to be arranged opposite to the thermocouple. Under the combined action of the cap brim and the flow blocking part, flames at the positions of the fire keeping holes between the cap brim and the flow blocking part can be stably combusted, it is ensured that a thermocouple detects enough thermoelectric force, gas supply is maintained, stable combustion is achieved, and the safety and reliability of the combustor are ensured.

The utility model discloses a gas stove ignition structure and a gas stove, belongs to the technical field of stoves, and is designed for solving the problems that a fixed ignition needle is easy to break by collision or is burnt by flame for a long time and the like. The utility model discloses an ignition structure of a gas stove. The ignition structure comprises an ignition needle; a driving member; the cam is connected to the output end of the driving part through a connecting rod, the output end of the driving part can drive the cam to synchronously rotate when rotating, and the cam directly or indirectly abuts against the bottom end of the ignition needle; when ignition operation needs to be carried out, the driving piece enables the cam to rotate to a far repose angle position through the connecting rod, and ignition operation is achieved. After ignition operation is completed, the driving piece enables the cam to rotate to the near repose angle position through the connecting rod, and the ignition needle automatically falls back. According to the gas stove ignition structure and the gas stove disclosed by the utility model, the ignition needle is normally ignited when extending out, and falls down until being separated from the flame range after ignition, so that the problem that the ignition needle is grilled by flame for a long time is solved, and the ignition needle can be prevented from being broken by collision by reducing the height.

The invention relates to the technical field of energy-saving gas stoves, in particular to an energy-saving gas stove burner and outer ring fire cover combined structure which comprises a burner body, an outer fire ring is arranged at the top of the burner body, a cylindrical sliding groove is formed in the burner body, and a gas inlet channel and a gas outlet channel are formed in the top of the cylindrical sliding groove. The gas inlet channel extends upwards and is communicated with an outer fire ring of the furnace end main body, the gas outlet channel extends upwards and is communicated with the outer circular surface of the furnace end main body, two symmetrical electric push rods are fixedly mounted at the two ends of the furnace end main body, and a lifting ring is fixedly mounted between the telescopic ends of the tops of the two electric push rods; an outer ring fire cover is rotationally connected to the outer circle face of the lifting ring, a plurality of air outlet holes are circumferentially formed in the outer circle face of the lifting ring at equal intervals, a plurality of fire outlet holes in one-to-one correspondence with the air outlet holes are circumferentially formed in the outer circle face of the outer ring fire cover at equal intervals, and the device can clean the fire outlet holes in different blocking states.

The utility model belongs to the technical field of the range, specifically provides a gas -cooker and combustion module. The utility model aims at solving the problem of higher cost when replacing the existing gas -cooker. The combustion module of the utility model includes bottom shell, burner, air inlet pipe and pot rack cover. The side of the bottom shell horizontal direction is provided with the insertion boss, to make the bottom shell with the base of gas -cooker insertion together with the help of insertion boss. The burner is set up in the bottom shell and is connected with the fixed connection of bottom shell. The air inlet end of air inlet pipe is connected with insertion boss fixedly, to make the air inlet of air inlet pipe form on insertion boss, the air outlet end of air inlet pipe is connected with the burner, to introduce the gas into the burner through air inlet pipe. The pot rack cover is installed on the bottom shell, to shield the internal space of bottom shell, and the cover hole for avoiding the burner is set up on the pot rack cover, to make the top end of burner protrude the pot rack cover. The combustion module with the above structure of the utility model overcomes the above technical problem.

This application relates to the field of gas stove technology, and discloses a burner cap for a burner and a gas stove. The burner includes a gas distribution cap, with the burner cap positioned above the gas distribution cap. The burner cap includes: a top wall, which is annular; an inner side wall, located below the top wall; and an outer side wall, located outside the inner side wall and below the top wall. The top wall, inner side wall, and outer side wall together define a mixing chamber. The burner cap also has a flame transfer groove that sequentially penetrates the inner side wall, top wall, and outer side wall, and is connected to the mixing chamber. A gas distribution section is located on the inner wall surface of the top wall, and is adapted to cooperate with the gas distribution mating part of the gas distribution cap to divide the mixing chamber into an inner mixing chamber and an outer mixing chamber. The flame transfer groove penetrates part of the gas distribution section. A sealing protrusion is located at the gas distribution section corresponding to the flame transfer groove and extends downward. The sealing protrusion can fit against the gas distribution mating part of the gas distribution cap to achieve a radial seal between the burner cap and the gas distribution cap at the flame transfer groove. This prevents air from mixing between the inner and outer mixing chambers.

The application relates to a control method and an AI self-closing valve, and relates to the technical field of self-closing valves, which comprises the following steps: collecting a surrounding image of a gas stove; collecting a gas stove image when the surrounding image contains a preset human feature; recognizing an actual gas flow through the gas stove image; obtaining electromagnetic operation parameters in response to the actual gas flow; taking a valve flap of a gas outlet of a self-closing valve as a detection valve flap; controlling the electromagnetic device to operate at the electromagnetic operation parameters, and collecting a detection position of the detection valve flap and sound detection information; obtaining a foreign matter type and a foreign matter position based on the sound detection information; updating the electromagnetic operation parameters in combination with the foreign matter type, the foreign matter position and the detection position; and controlling preset electromagnetic devices to drive the detection valve flap to slide at the electromagnetic operation parameters. The application has the effect of improving the safety of gas use.

The burner assembly comprises a first burner and a second burner, the first burner and the second burner are in a hollow cylinder shape, and a plurality of first grooves and second grooves connected with the upper end face and the lower end face are evenly formed in the outer side walls of the first burner and the second burner correspondingly. The first combustor is coaxially arranged in the second combustor, and the outer diameter of the first combustor is matched with the inner diameter of the second combustor, so that a circle of first flame path is formed between the first grooves and the inner wall of the second combustor; the second combustor is coaxially arranged in the gas stove burner, and the outer diameter of the second combustor is matched with the inner diameter of the gas stove burner, so that a circle of second flame path is formed between the second grooves and the inner wall of the gas stove burner. The gas stove is convenient to process, can be conveniently detached for cleaning when being blocked, and can also be conveniently mounted in the gas stove after being cleaned.

The application relates to a fire cover for a gas stove, which comprises a fire cover body, a ring-shaped top wall of the fire cover body, an inner ring wall and an outer ring wall vertically or obliquely downward extending from inner and outer side edges of the ring-shaped top wall and forming a gas mixing cavity, characterized in that the outer ring wall is connected with the ring-shaped top wall through interval arranged partition blocks in the circumferential direction, the partition blocks are provided with communicating holes communicating with the gas mixing cavity, and the outer ring wall and the outer side edge of the ring-shaped top wall are formed with annular gaps communicating with the gas mixing cavity through the partition blocks, and each partition block is arranged below the annular gap. Compared with the prior art, the application has the advantages that the annular gap can make the fire cover body have better flame stabilizing effect, and at least two partition blocks are arranged below the annular gap, and the partition blocks are provided with communicating holes communicating with the annular gap and the gas mixing cavity, so that the communicating holes can play the role of flame transmission between the annular gaps, and flame transmission and flame stabilizing are more efficient and stable.

The burner comprises a gas mixing chamber and a fire cover, the gas mixing chamber and the fire cover jointly define a gas mixing cavity of the burner, a fire transferring structure is arranged on the fire cover, the burner further comprises a shielding structure, the shielding structure is arranged in the gas mixing cavity, and the shielding structure is located between an inlet of the gas mixing cavity and the fire transferring structure; and in the radial direction of the combustor, the shielding structures are continuously arranged between the outer side wall and the inner side wall of the gas mixing cavity. According to the burner, the shielding structure is arranged in the gas mixing cavity, the shielding structure is located between the inlet of the gas mixing cavity and the fire transferring structure and is continuously arranged between the two walls of the gas mixing cavity in the radial direction, and gas is prevented from flowing to the fire transferring structure from the inlet of the gas mixing cavity along a straight line through the shielding structure; under the condition that the height of the gas mixing cavity is not increased, the path of fuel gas flowing from the inlet to the fire transferring structure is prolonged, the flow speed of the fuel gas flowing to the fire transferring structure is reduced, and flattening of the combustor is achieved.

The utility model discloses a gas stove safety protection device and relates to the technical field of kitchen ware equipment, the device comprises a gas stove body, an outer protection frame and a windproof assembly used for preventing the gas stove body from wind, the outer protection frame is installed on the outer wall of the gas stove body, and the windproof assembly comprises a moving groove. The movable grooves are formed in the two sides of the top of the outer protection frame, the interiors of the movable grooves are slidably connected with wind shields, the interiors of the wind shields are slidably connected with telescopic covers, the telescopic covers are slidably connected to the top of the outer protection frame, and lifting assemblies used for lifting the wind shields are arranged at the bottoms of the wind shields. The windproof cover in a retracted state can be taken out from the moving groove by synchronously pressing the windproof cover, and when the guide column moves to the bottom of the heart-shaped groove, the windproof cover can be quickly locked, it is ensured that the windproof cover cannot move accidentally in the using process, and the using safety is improved.

The application provides a burner with an injection mixing system and a gas stove, and relates to the technical field of gas stoves. The burner with the injection mixing system comprises a burner head and an outer ring fire cover. The burner head comprises at least an outer ring and a middle ring, and a burner head surrounding partition is arranged between the outer ring and the middle ring. The burner head surrounding partition is provided with a partition first outer ring gas outlet and a partition second outer ring gas outlet. A middle ring injection pipe is provided with a first middle ring gas outlet. The outer ring fire cover comprises an outer ring mixing cavity and a middle ring mixing cavity, and the outer ring fire cover is buckled on the burner head, so that the outer ring mixing cavity is communicated with the outer ring premixing cavity and the middle ring mixing cavity is communicated with the middle ring premixing cavity. The gas stove comprises the burner with the injection mixing system. The technical problem that the gas pressure of the outer ring and the middle ring fire hole of the existing technology is not uniform, which easily leads to flame separation and backfire is solved, the gas flow pressure field in the distribution gas channel is consistent, the gas flow of each fire hole of the outer ring fire cover is uniform, and the technical effect of avoiding flame separation and backfire is achieved.

This application relates to the field of kitchen appliance technology, and more particularly to an inner ring burner cap and a gas stove. The inner ring burner cap has an inner ring cavity; ignition holes and flame-preserving holes, respectively communicating with the inner ring cavity, are formed on the side walls of the inner ring burner cap. The ignition holes are configured opposite to the ignition needle, and the flame-preserving holes are configured opposite to the thermocouple; a main burner hole, communicating with the inner ring cavity, is provided at the top of the inner ring burner cap; an ignition groove, communicating with the inner ring cavity, is formed on the outer side wall of the inner ring burner cap, arranged around the axis of the inner ring burner cap, and located between the outlet of the flame-preserving hole and the outlet of the main burner hole. The ignition groove on the inner ring burner cap facilitates the upward propagation of the flame at the flame-preserving hole to form a flame at the main burner hole, enabling the inner ring burner cap to achieve rapid and stable flame propagation, thus improving the user experience.

The present application provides a kind of energy-gathering disc pot rack and gas stove, it relates to the technical field of kitchen utensils, the energy-gathering disc pot rack includes energy-gathering disc body and support foot piece;Energy-gathering disc body is equipped with central through hole;Energy-gathering disc body is equipped with annular convex structure, the area between annular convex structure and the inner hole edge of central through hole forms secondary air preheating area.The gas stove includes energy-gathering disc pot rack.It relieves the technical problem that the existing gas stove exists in the combustion process, when the secondary air of lower temperature enters the central through hole of energy-gathering disc, there is diffusion to the gathering area of combustion heat energy air mass and heat exchange, reduces the temperature field of the gathering area of combustion heat energy air mass, so that the temperature of combustion flame is not high, causes heat energy loss, produces the technical problem of low combustion thermal efficiency, achieves the best effect of overall combustion condition, thereby improves the combustion thermal efficiency, and reduces the technical effect of CO exhaust emission.