274 results about "Discharge pressure" patented technology

The invention provides an NMP (N-Methyl Pyrrolidone) purification process based on an NMP rectification system, the process is completed by matching a tail gas desorption tower, the space in the tower is divided into an adsorption bin and a desorption bin by arranging a middle box body, two groups of adsorption devices capable of alternately entering the two bins are mounted, and automatic switching of the adsorption devices is realized by utilizing a driving mechanism; when the adsorption efficiency of one group of adsorption devices is reduced, the adsorption devices are automatically transferred to the desorption bin for regeneration treatment, meanwhile, the other group of adsorption devices enter the adsorption bin to continue working, and in the desorption process, low-pressure saturated steam and hot nitrogen are adopted for purging, so that residual moisture is effectively removed, and the adsorption activity is recovered; compared with the prior art, the process has the advantages that gas exchange in the adsorption and desorption process is reduced, the sealing performance and the air pressure balance control capability of the system are improved, the process ensures continuous production, meanwhile, the energy consumption and the discharge pressure are remarkably reduced, and the NMP purification efficiency and the product quality are improved.

A compressor includes a housing, a first compression mechanism and a second compression mechanism disposed in the housing, and a housing cover fixed to the housing. Both the first compression mechanism and the second compression mechanism are configured to compress a working fluid from a suction pressure to a discharge pressure. The first compression mechanism includes a first cylinder housing having a first fluid storage plenum. The second compression mechanism includes a second cylinder housing having a second fluid storage plenum. The housing cover defines an intermediate-fluid port in fluid communication with the first fluid storage plenum via a first intermediate-fluid passage and the second fluid storage plenum via a second intermediate-fluid passage. Working fluid at an intermediate pressure enters the intermediate-fluid port. The intermediate pressure is greater than the suction pressure and less than the discharge pressure.

In a fuel supply system that supplies gaseous fuel to the engine of a vehicle, the fluid pressure of the discharged gaseous fuel can be adjusted by electronic control, and the fluid pressure of the gaseous fuel can be safely released in the event of a malfunction such as a power supply failure. [Solution] In a fuel supply system 100 that supplies gas fuel to an engine 6, the system includes an electronically controlled regulator 3 that reduces the introduced gas fuel to a set pressure and discharges it, a pressure sensor 7 that detects the fluid pressure of the gas fuel after reduction, and a normally open electromagnetic relief valve 8 provided downstream of the pressure regulating valve of the electronically controlled regulator 3. The electromagnetic relief valve 8 opens when the fluid pressure detected by the pressure sensor 7 reaches a pressure threshold or when the system is not energized, releasing the gas fuel outside the system.

The present invention relates to an automotive pendulum-slider pump (10, 10') for providing pressurized lubricant. The automotive pendulum-slider pump (10, 10') includes a non-rotatable rotor housing (12); a rotatable rotor ring (20, 20') that rotates within the rotor housing (12) and surrounds a pumping chamber (25) having an intake opening (18) and an exhaust opening (19); a rotatable rotor hub (35) that is rotatably connected to the rotor ring (20, 20'); and a plurality of pendulum blades (30) arranged at equal angles on the circumference of the rotor ring (20, 20') and each blade (30) is pivotally hinged by a separate pendulum hinge (32) at the rotor ring (20, 20'). The vanes (30) divide the fluid in the pumping chamber (25) into multiple pumping compartments (40), wherein the pumping chamber (25) is equipped with an automatically switching pressure matching valve (50, 50') for pre-opening the fluid connection between at least one pre-openable pumping compartment (40B) and the discharge opening (19) just before the pumping compartment (40B) has reached the discharge opening (19). The pre-opening fluid connection provides pressure matching between the pre-openable pumping compartment (40B) and the discharge pressure to reduce noise emissions caused by pressure pulsations resulting from sudden pressure equalization that occurs when the pumping compartment (40) reaches the discharge opening (19).

A method of controlling a pumping stage of a fracturing fleet at a wellsite with at least two electric frac pumps to increase the efficiency of the electric frac pumps comprises communicating an interim flowrate to the electric frac pumps and calculating an efficiency value from measured power from the VFD and measured flow rate, intake pressure, and discharge pressure. The method can increase a total efficiency of the fracturing fleet above a threshold efficiency value by iterating the interim setpoint from a first interim setpoint to a second interim setpoint for the electric frac pumps, wherein the second interim setpoint decreases the flowrate to the less efficient electric frac pumps and increases the flowrate an equal amount to the more efficient electric frac pumps.

The present application provides a capacity control valve with high control accuracy and excellent energy efficiency in normal control. The capacity control valve (V) has a valve housing (10) formed with a discharge port (12) through which a discharge fluid of a discharge pressure (Pd) passes, a suction port (13) through which a suction fluid of a suction pressure (Ps) passes, and a control port (13) through which a control fluid of a control pressure (Pc) passes; a rod (83) driven by a solenoid (80); and a main valve (50) composed of a main valve seat (10a) and a main valve core (51), the communication between the discharge port (12) and the control port (14) being opened and closed by the movement of the rod (83), the capacity control valve being provided with a CS valve (56) between the control port (13) and the suction port (14), the CS valve (56) being controlled by the dynamic pressure of the fluid flowing from the discharge port (12) to the control port (13) through the opening of the main valve (50).

To provide a scroll-type compressor capable of discharging a refrigerant from a back pressure chamber without depending on a position of a turning scroll during stop of an operation.SOLUTION: A scroll-type compressor 10 includes a housing 11, a support member 13 that supports a rotating shaft 15, a fixed scroll 25 and a turning scroll 26. The scroll-type compressor 10 includes a suction pressure region, a compression chamber 27, a discharge pressure region and a back pressure chamber 50. The back pressure chamber 50 communicates with the suction region by using an intermittent exhaust passage 60 and communicates with the discharge pressure region by using an exhaust passage 70. An exhaust valve enabling switching between an exhaust state and a non-exhaust state is disposed in the exhaust passage 70. The exhaust valve becomes the exhaust state when pressure of the back pressure chamber 50 is higher than that of the discharge pressure region. When stopped, the scroll-type compressor 10 can discharge the refrigerant in the back pressure chamber 50 by using the exhaust passage 70 even if the intermittent exhaust passage 60 and the suction pressure region are shut off by the turning scroll 26.SELECTED DRAWING: Figure 1

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains the discharge pressure and the return air pressure of the compressor; controls the operation of the flow regulating device according to the discharge pressure and the return air pressure, detects the discharge pressure and the return air pressure of the compressor in real time, then adjusts the flow regulating device according to the detected discharge pressure and return air pressure, adjusts the flow regulating device, and effectively avoids the situation that the compression ratio of the compressor is increased, further protects the compressor, and prolongs the service life of the compressor.

The application relates to an air conditioning unit which comprises a compressor, a heat exchanger assembly, a four-way valve and a controller, the controller being connected with the compressor, the four-way valve, a suction pressure sensor and a discharge pressure sensor, when the discharge pressure Pd and the suction pressure Ps satisfy Pd P1 and Pd-Ps

This invention provides a pump body assembly and a compressor. The pump body assembly includes a cylinder liner, a piston, and a muffler structure. The cylinder liner has an inlet and an outlet. The piston is slidably disposed within the cylinder liner to form a variable volume chamber, and the variable volume chamber is located in the sliding direction of the piston. The muffler structure is connected to the cylinder liner and has a muffler cavity. The cavity wall of the muffler cavity has a communication hole for communicating with the outlet, and the cavity wall also has a pressure relief port. When the piston is in the inlet position, the inlet communicates with the variable volume chamber; when the piston is in the outlet position, the outlet communicates with the variable volume chamber; and when the outlet pressure reaches a preset outlet pressure, the pressure relief port is opened. This invention solves the problems in the prior art where oil-containing refrigerant in the compressor severely affects the thermal efficiency of the refrigeration equipment, and where fluctuations in outlet pressure lead to an excessively high suction-to-discharge pressure ratio.

To provide a work vehicle capable of improving fuel economy by the control to switch modes between an economy mode and a standard mode at an appropriate timing, and capable of eliminating the troublesomeness of manually switching the modes between the standard mode and the economy mode.SOLUTION: A work vehicle 1 includes an engine 20, a first hydraulic pump 31, a second hydraulic pump 32, a travelling device 6, a work device 9, an operation device 5, an ECU 30, and a vehicle controller 7. The vehicle controller 7 transmits a control command in a standard mode to the ECU 30 when the travelling device 6 is stopped, discharge pressure from the second hydraulic pump 32 is a reference value U1 or more, and a first period T1 passes with an engine load factor of a predetermined upper limit E1 or more, transmits a control command in an economy mode to the ECU 30 when a second period T2 passes with the engine load factor of a predetermined lower limit or less, and transmits a control command in the standard mode to the ECU 30 when the travelling device 6 is actuated.SELECTED DRAWING: Figure 1

The present application relates to the technical field of carbon dioxide heat pump system, and provides a charging amount calculation method and system for a carbon dioxide heat pump system for vehicles, comprising: based on the architecture of a carbon dioxide cycle heat pump system, a carbon dioxide cycle heat pump system model is constructed; for each heat pump system operation mode, based on the environmental parameter boundary and the heat pump system operation parameter boundary, different refrigerant charging amounts are given, the carbon dioxide cycle heat pump system model is used to calculate the evaporator inlet refrigerant temperature, the evaporator outlet refrigerant temperature and the compressor discharge pressure, and the charging amount interval is determined; the intersection area of the charging amount intervals under all heat pump system operation modes is taken as the charging amount interval range suitable for the carbon dioxide cycle heat pump system. The best charging amount of the CO2 cycle heat pump system is obtained by means of simulation calculation, which replaces the experimental research mode and saves the project development cycle and cost.

Nozzle (10) for countercurrent injection of a liquid material for mixing with other components, comprising: - a nozzle housing (20) having at least one inlet opening (26) for supplying a liquid material and a nozzle outlet (22) for discharging the material, - wherein the nozzle housing (20) has a piston chamber (23) extending along a longitudinal axis (L) of the nozzle housing (20); - a nozzle piston (60) which is axially displaceable in the piston chamber (23) along the longitudinal axis (L) and separates a material chamber (24) and a pressure fluid chamber (25) from each other, - wherein a material surface (61) of the nozzle piston (60) can be subjected to a material pressure (PM) of the material and a pressure fluid surface (62) of the nozzle piston (60) can be subjected to a control pressure (PC) of a pressure fluid; - a nozzle needle (40) which is connected to the nozzle piston (60) and forms a variable nozzle opening (42) with the nozzle outlet (22); - a sealing device (70) that seals a circumferential gap (83) between the nozzle housing (20) and the nozzle piston (60), - wherein the control pressure (PC) in the pressure fluid chamber (25) is adjustable to control a discharge pressure (PA) of the material at the exit from the nozzle opening (42), wherein - the sealing device (70) comprises first and second sealing elements (71a, 71b), characterized by the fact that - the nozzle piston (60) forms a receptacle (68) for the sealing device (70), - the sealing device (70) has a sealing retaining ring (63) with circumferential recesses (67a, 67b) for receiving sealing elements (71a, 71b), - from the material surface (61) at least one connecting channel (66a) between the material chamber (24) and a circumferential recess (67a) and - at least one connecting channel (66b) is formed between the pressure fluid surface (62) and a circumferential recess (67b), - the first and second sealing elements (71a, 71b) are each designed as a sealing ring with a C-profile and a lateral circumferential groove (72a, 72b), - wherein the circumferential groove (72a) of the first sealing element (71a) is oriented towards the material surface (61) and the circumferential groove (72b) of the second sealing element (71b) is oriented towards the pressure fluid surface (62), - wherein the sealing element (71a, 71b) expands in a radial direction when the circumferential groove (72a, 72b) is filled with a pressurized liquid, for example the material or the pressurizing fluid.

The utility model discloses an outdoor high -voltage cabinet's burning arc pressure -relief device, and pressure -relief device includes: base subassembly, passageway subassembly and apron subassembly, wherein, base subassembly is used for installing high -voltage cabinet, and the bottom of base subassembly and high -voltage cabinet forms the channel of linking up, passageway subassembly includes pressure -relief channel, and pressure -relief channel includes air intake and gas outlet, and air intake is communicated with the channel of linking up, and gas outlet is located high -voltage cabinet top surface and is communicated with the outside, apron subassembly is located gas outlet, and apron subassembly is used for controlling the opening and closing of gas outlet, and the utility model discloses a channel of linking up and pressure -relief channel are set up, and the pressure -relief airflow is led out the cabinet from high -voltage cabinet inside, and the direction of gas outlet controls the pressure -relief direction from below to top, makes the pressure -relief airflow discharge from high -voltage cabinet top, avoids the harm to the surrounding personnel and things. The utility model is applicable to the field of distribution cabinet pressure relief.

An air gun assembly includes a gun tube and a pressure tube assembly. The gun tube defines a first aperture. The pressure tube assembly includes a fill block and a cylinder coupled to each other. The fill block defines a second aperture and the cylinder defines a chamber configured to contain compressed gas. The air gun assembly includes a pin disposed through the first aperture and the second aperture to couple together the fill block and the gun tube. The pin defines a channel. The air gun assembly also includes a valve assembly attached to the pin and at least partially disposed inside of the channel. The valve assembly is configured to selectively allow fluid communication into the chamber via the channel.

This invention provides a vane pump that can reduce the sliding resistance of the rotor by ensuring a gap between the side plate and the rotor. [Solution] The vane pump 100 according to the present invention comprises a rotor 102 rotatable around an axis 110, a plurality of vane grooves 108 formed radially on the outer circumferential surface of the rotor, a plurality of vanes 106 fitted into the plurality of vane grooves and slidably protruding from the rotating rotor, two side plates 114, 116 arranged on both sides of the rotor and facing the side surface of the rotor, and back pressure grooves 132, 134, 142, 144 formed on the side plates, which are able to communicate with the axis side of the vane grooves of the rotor and through which discharge pressure is guided, and the two side plates have continuous annular protrusions 152, 154 formed on the sliding surfaces 122, 146 facing the rotor and located axis side of the back pressure grooves.

The utility model discloses a low-inlet and high-outlet type depressurization regulating valve which is of a low-inlet and high-outlet structure, that is, an inlet of a fluid inlet channel is lower than an outlet of a fluid pressure relief channel, and the fluid inlet channel can guide fluid to the bottom of a liquid inlet channel; the fluid is discharged out of the pressure relief cavity in the circumferential direction of the valve element after being subjected to pressure relief through at least one bent part of the flow slowing channel, the pressure relief cavity guides the fluid to the fluid pressure relief channel to be discharged, the low-inlet and high-outlet structure counteracts fluid kinetic energy through gravitational potential energy, the flow speed of the fluid entering the valve element is reduced, and erosion to the adjusting valve is reduced.

The refrigeration device using an R454C refrigerant has, as compared with the refrigeration device using an R32 refrigerant, a higher ratio of a discharge pressure to a suction pressure of a compressor, and a larger impact load applied to a bearing portion of a crankshaft, so that the bearing portion is easily damaged. An air conditioning device (1) comprises a refrigerant circuit (10) and an outdoor unit control unit (71). The refrigerant circuit (10) has a compressor (11). The refrigerant circuit (10) circulates a refrigerant by the compressor (11) to perform a refrigeration cycle. The outdoor unit control unit (71) performs control relating to the refrigeration cycle. The compressor (11) has a compression chamber (Sc) in which the refrigerant is compressed, and an injection pipe (53) that communicates with the compression chamber (Sc). A ratio of a discharge pressure to a suction pressure of the compressor (11) is 4.5 times or more and 6.25 times or less a compression ratio of the compression chamber (Sc). The outdoor unit control unit (71) performs control such that a first ratio, which is a ratio of the flow rate of the refrigerant flowing through the injection pipe (53) to the flow rate of the refrigerant circulating through the refrigerant circuit (10), is 79% or more.

The application discloses a fly ash sampling device of a coal ash conveying system of a thermal power plant, relates to the technical field of coal ash sampling and detection of power plants, and aims to solve the problems of dust pollution and direct spraying of high-temperature ash samples. Coal ash enters and impacts the filter through the connecting part. The pressure of the coal ash main conveying pipe is greater than the pressure inside the fixed ring. The filter collects coal ash until the filter is blocked. At this time, the air pressure is greater than the elastic force of the reset assembly, thereby driving the filter to move downward, so that the inner container filter screen is exposed. At this time, the gas preferentially passes through the inner container filter screen and is discharged from the exhaust cavity, avoiding the problem of fly ash. The air impact ring groove heat dissipation barrel is buffered and enters from the inlet, passes through the heat dissipation channel, is buffered and heat-dissipated, and is discharged from the outlet. Then, the heat is dissipated through the heat dissipation disc and is discharged from the support plate to be heat-dissipated and buffered by the ground. The gas is not only subjected to cooling treatment, but also can be buffered. Finally, the gas discharge pressure and temperature are reduced, and the safety is high.

A pipeline shaft pump for extracting fluid from a geothermal production well is proposed, wherein the geothermal production well includes an inner well surface, and wherein the pipeline shaft pump includes a drive unit and a hydraulic unit having a rotor, wherein the hydraulic unit includes: an inlet section for receiving fluid under suction pressure; an outlet section including a discharge head for discharging fluid under discharge pressure; and a riser pipe. The invention also proposes a method for installing the pipeline shaft pump.

A stable discharge pressure of compressed hydrogen gas generated from the electrolysis of water is achieved and maintained at the outlet of a "hybrid" multistage compression system comprising at least a first section comprising at least one centrifugal 5 compressor powered at least in part by electricity generated from at least one renewable energy source and a further section downstream of the first section, wherein the further section comprises at least one reciprocating compressor. 10 15 20 25 20 24 21 96 83 13 S ep 2 02 4 A B S T R A C T 2 0 2 4 2 1 9 6 8 3 1 3 S e p 2 0 2 4 5 1 0 1 5 2 0

The invention provides a heat pump unit and an anomaly detection method thereof, a computer readable storage medium and a control device. The anomaly detection method comprises the steps that if any one of the difference value delta T of the water supply temperature and the water return temperature of a user side of the heat pump unit and the difference value delta P of the exhaust pressure and the suction pressure of a compressor of the heat pump unit is in an abnormal state, sound signals in the operation process of the heat pump unit are obtained; if the abnormal signals are recognized from the sound signals, executing at least one main valve element driving step; and according to whether the difference value delta T and the difference value delta P are in a normal state or not and whether abnormal signals are recognized from the sound signals or not in the executing process and / or after the main valve element driving step is executed, whether the heat pump unit operates normally or not and the possible abnormal types are judged. The computer readable storage medium and the control device are configured to implement the anomaly detection method. The heat pump unit comprises the control device. According to the invention, the accuracy of four-way valve fault diagnosis can be improved.

The present application relates to a compressor and an air conditioner capable of reducing noise generated by a rotating shaft bending vibration. The compressor of the embodiment is provided with a cylinder, a rotating shaft, a bearing, a discharge valve mechanism, and a muffler. The discharge valve mechanism, which is arranged at a flange portion of the bearing, has a discharge valve that is longer in a prescribed direction and that is deformed to open when refrigerant compressed in the cylinder reaches a prescribed discharge pressure, and a valve pressing member that suppresses further deformation of the discharge valve when the discharge valve is opened. The muffler covers the bearing in a manner surrounding between the flange portion and a boss portion, forms a muffler chamber for discharging the refrigerant compressed in the cylinder, and defines an outer profile of the muffler chamber by a face portion on one end side in an axial direction of the rotating shaft, a flange portion on the other end side in the axial direction of the rotating shaft, and a side face portion that connects the face portion and the flange portion in a cylindrical shape over the entire circumference of the rotating shaft, and has recesses in which the face portion and the side face portion are respectively recessed inward of the muffler chamber.

This invention provides a compressor, an air conditioning system, and a heat pump system. The compressor includes a housing; a crankshaft; a roller assembly; and an adjustment structure. The adjustment structure is disposed on the housing and can adjust the volume of the compression chamber and the size of the roller assembly in the direction of the crankshaft's rotation axis. The compressor, air conditioning system, and heat pump system provided by this invention utilize the adjustment mechanism to adjust the volume of the compression chamber, thereby achieving the purpose of adjusting the compressor's discharge capacity and compression ratio. This overcomes the problem in the prior art that requires a frequency converter to adjust the compressor's speed, reduces the compressor's energy consumption, improves the adjustment accuracy of the compressor's discharge pressure, and the adjustment mechanism can also simultaneously adjust the roller assembly, enabling the roller assembly to adapt to the volume of the compression chamber, ensuring the compressor's reliable operation, and improving the energy efficiency and reliability of the air conditioning system and heat pump system.

The air conditioning system comprises a water chilling unit, a compressor, a condenser, an expansion valve and an evaporator, the compressor, the condenser, the expansion valve and the evaporator are connected in series through a pipeline, and the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser; monitoring the shell vibration speed of the shell through a vibration speed acquisition module; the exhaust pressure of the compressor is monitored through a pressure sensor; the controller is electrically connected with the compressor, the vibration speed acquisition module, the pressure sensor and the rotating speed sensor; the controller is configured to determine the vibration speed and the exhaust pressure fluctuation value of the compressor according to the first logic based on the shell vibration speed and the exhaust pressure, conduct logic judgment based on the preset condition, and conduct active intervention when the compressor meets the surge prevention condition or the surge avoidance condition, so that frequent protection shutdown is avoided, and the service life of the compressor is prolonged. The service life of the compressor is prolonged.

This application discloses an air conditioner control method, an air conditioner control device, and a readable storage medium. The method is applied to an air conditioner equipped with a liquid pump. The method includes: when the air conditioner is operating in cooling mode, acquiring the opening degree of the air conditioner's electronic expansion valve and the air conditioner's suction superheat; starting the liquid pump based on the opening degree of the electronic expansion valve and the air conditioner's suction superheat; acquiring the air conditioner's compressor discharge pressure and the liquid pump's head; determining the air conditioner's target composite pressure based on the discharge pressure and the head; determining the target speed of the air conditioner's outdoor fan based on the target composite pressure to perform a first pressurization of the refrigerant; and adjusting the operating frequency of the liquid pump based on the air conditioner's suction superheat to perform a second pressurization of the refrigerant. By pressurizing the refrigerant through the liquid pump and the outdoor fan, the energy consumption of the air conditioner is reduced.

A liquid discharge head is provided that can quickly discharge a variety of liquids without increasing the size. The liquid discharge head includes a plurality of inlet portions corresponding to the variety of liquids, a plurality of pressure chambers in which discharge pressure is applied to the liquids, a plurality of individual outlet portions through which the liquids are supplied to the pressure chambers, and a manifold that communicates with the plurality of inlet portions and through which the liquids from the plurality of inlet portions are supplied to the plurality of individual outlet portions. The manifold includes a plurality of upstream side portions in each of which a passage corresponding to one of the plurality of inlet portions is defined, and a downstream side portion that communicates with the plurality of upstream side portions and in which a passage that communicates with the plurality of individual outlet portions is defined.

The application relates to a tire vulcanization control method for a tire vulcanization system, wherein for each side of a flexible mold and a capsule, the vulcanization system comprises a shaping nitrogen inlet pipe connected to a capsule steam inlet end and a shaping nitrogen outlet pipe connected to a capsule discharge end, and the method comprises: primary shaping: controlling the shaping nitrogen to enter the capsule through the shaping nitrogen inlet pipe until a preset first initial shaping pressure is reached; controlling the flexible mold to close, and determining a shaping discharge pressure P in real time during the closing process 泄 ; controlling a part of the shaping nitrogen to be discharged from the shaping nitrogen outlet pipe during the closing process, and the discharge amount is based on the real-time shaping discharge pressure P 泄 . In the primary shaping stage, the shaping pressure in the mold cavity is automatically adjusted according to the change of the mold cavity volume during the closing process, so that the problem of excessively high shaping pressure during the closing process is prevented.

A kind of hydraulic oil supplement system and supplement method of diaphragm compressor, control module judges that oil discharge pressure signal is less than the preset low alarm threshold of oil discharge pressure, and exhaust pressure signal is less than the preset low alarm threshold of exhaust pressure, and exhaust flow signal is greater than the preset high alarm threshold of exhaust flow, then control module will action instruction be given to actuating mechanism, actuating mechanism automatically rotates the adjusting screw cover on oil supplement plunger pump, it moves towards the direction of eccentric sleeve, to increase the movement stroke of plunger, to increase the oil supplement amount of oil supplement plunger pump.The present application can adjust the oil supplement amount of oil supplement plunger pump on line without stopping diaphragm compressor and disassembling cylinder head component, to supplement the hydraulic oil that leakage increases due to piston sealing element failure or sealing performance weakening of diaphragm compressor, reduce the great workload brought by shutdown replacement sealing element, and avoid the economic loss caused by shutdown.

An airbag device is provided for a saddle seat vehicle, which can restrict the separation of an airbag until the airbag is deployed, so that the airbag can be separated in a deployed state. The airbag device for a saddle seat vehicle comprises a gas generator (43) and an airbag (42), wherein the airbag device has a first restriction section (90) that restricts the separation between the gas generator (43) and the airbag (42). The first restriction section (90) has an elastic element (71) positioned inside the gas generator (43). When the gas generator (43) releases a gas at a first gas discharge pressure (P1), the diameter of the elastic element (71) increases due to the gas pressure, and the gas generator (43) and the elastic element (71) enter a locked state, thus restricting the separation of the airbag (42). When the gas generator (43) releases a gas at a second gas discharge pressure (P2), the elastic element (71) decreases to a diameter smaller than the diameter in the locked state, and the locked state is released.The separation of the airbag (42) is not restricted.