124 results about "Pressure switch" patented technology

The application discloses a process window determination method, a semiconductor processing method and equipment, and relates to the technical field of semiconductor manufacturing. In view of the problems of time loss and poor exhaust mode compatibility caused by the fact that the prior art relies on pressure gauge reading stability to determine the process window, the application determines the process window start time by recording the switching period of the measured pressure between two stable pressures and combining the flow switching instruction time; further, the pre-calibration stage and the process stage are distinguished, the switching period is obtained in the pre-calibration stage, and a database is established, and in the process stage, the parameters are directly reused for open-loop operation, and multiple exhaust modes such as fixed opening of the vacuum valve and feedback regulation are compatible. The application can start the process without waiting for the pressure gauge reading to be completely stable, effectively increases the process window time, significantly improves the equipment productivity and process adaptability, and is suitable for rapid pressure switching cyclic semiconductor processes such as atomic layer etching and atomic layer deposition.

This invention provides a control method and system for an on-board electric compressor, including: when the compressor starts for the first time, the compressor controller initiates a self-test process to check whether the internal voltage of the controller is normal; if the internal voltage is within a preset voltage range, subsequent control steps are executed; if the internal voltage exceeds the preset voltage range, it is determined that the internal voltage of the controller is faulty, and subsequent control steps are not executed; the opening signals of the AC switch and the blower switch are transmitted sequentially to the vehicle controller via the evaporator thermostat and the pressure switch; the vehicle controller sends a high-voltage enable signal through the multi-in-one integrated controller and sends a compressor start / stop signal to the compressor controller; after receiving the compressor start / stop signal, the compressor controller starts the compressor and operates with a multi-stage speed control strategy; this invention solves the problem of frequent compressor start / stop caused by triggering the evaporator over-temperature protection and over-pressure protection devices without affecting the cooling effect of the cab.

This invention relates to a graded trigger-type crash barrier and crash prevention method for dry dock boarding ramps, belonging to the technical field of dry dock boarding ramps. The crash barrier includes uprights and crossbeams. A crash prevention structure is installed on the crossbeams, comprising: a mounting plate with a locking part on the back for locking onto the crossbeam; an outer airbag connected to the front of the mounting plate, which is inflated under normal conditions to form a first-level crash buffer; an inner airbag connected to the front of the mounting plate and located inside the outer airbag, which is deflated under normal conditions; and a high-pressure gas cylinder installed at the locking part, which is connected to the inner airbag via a pipeline. A pressure switch is installed on the pipeline, and the pressure detection end of the pressure switch is located inside the outer airbag. When the outer airbag is impacted and the internal pressure rises to the trigger threshold of the pressure switch, the pressure switch opens the pipeline, and the high-pressure gas cylinder inflates the inner airbag, causing the inner airbag to expand and form a second-level crash buffer.

This invention relates to the field of vehicle air pressure braking system control technology, specifically to an air compressor control system, control method, and engineering machinery. The air compressor control system of this invention includes an air compressor, a dryer, an air pressure sensor, and a vehicle controller; the vehicle controller is communicatively connected to the air compressor, an air pressure switch, and two air pressure sensors (loop 1 and loop 2). This invention utilizes the loop 1 and loop 2 air pressure values ​​detected by the air pressure switch and the loop 1 and loop 2 air pressure sensors as two signal sources to construct two control strategies to optimize the start-stop state control of the air compressor, effectively improving the working efficiency and stability of the air compressor.

The utility model discloses a safety valve for coffee machine, including three -way casing, form water inlet portion, water outlet portion and pressure -relief portion with the intercommunication of outside respectively, the position of being close to water inlet portion, the casing is equipped with the first threaded connection portion and pump body connection, install the first elastic pressure switch in the water outlet portion, and the first elastic pressure switch at least includes the first piston of resettable, and the first piston is used for blocking the water outlet portion, install the second elastic pressure switch in the pressure -relief portion, and one end of pressure -relief portion is located the rear end of first piston, and can communicate with water outlet portion, provide a brand -new installation mode, when installing, adopt the mode of direct connection to make the first threaded connection portion and the water outlet end connection of pump body, and can realize the connection by rotating the casing, and the installation step is simple, and the parts used are few, in addition, by changing the position of pressure -relief portion, can make the water pressure of back priming can act on the second elastic pressure switch, when the pressure that valve body bears is exceeded, the second elastic pressure switch also can open and carry out pressure relief, avoid damaging valve body and coffee machine.

The utility model discloses a horizontal line drying system, heating case is used for heating the air source that the air blower blows out, and heating case is equipped with the air pressure switch, the upper air knife, the lower air knife adopt hot -blast pipe connection between the air blower, heating case, and the air pressure gauge that detects the air pressure in the hot -blast pipe is equipped on the air pressure switch. The utility model discloses the air blower in drying system is connected with hot -blast pipe through heating case to groove body, prevents the air blower from damaging, and heating case or causes the fire and so on work safety accident of continuous heating because of breakdown. The embodiment adopts a new type and increases an air pressure switch between heating case and the upper air knife, the lower air knife, when the horizontal drying system starts, whether the air blower transports the stable air pressure to heating case inside is detected through the air pressure switch, to decide whether the drying device works, when the air pressure gauge detects no air pressure, heating case stops heating, avoids drying system to carry out dry burning under the state of no air current, reduces the accident that drying system appears breakdown and causes.

The utility model discloses a kind of hydraulic safety devices of lifting platform, it is related to lifting platform technical field, including lifting platform, lifting platform lower side is provided with pedestal, scissor fork frame is installed in pedestal interior, scissor fork frame lower part one side is rotatably connected with pedestal, the sliding seat of corresponding scissor fork frame is installed in the both sides of pedestal surface, safety hydraulic cylinder is set to the left and right sides of pedestal, safety hydraulic cylinder is located between pedestal and lifting platform.The utility model cooperates design by lifting hydraulic cylinder and safety hydraulic cylinder, constructs double protection system, main hydraulic cylinder drives conventional lifting, independent safety hydraulic cylinder is as emergency support, when system flow is abnormal, pressure switch triggers oil circuit locking, energy accumulator maintains pressure, effectively prevent scissor fork frame and lifting platform unexpected drop, two sides safety hydraulic cylinder can quickly adapt safety, from power output and mechanical constraint two dimensions, improve the overall safety of lifting platform.

This invention relates to the field of welding technology, and more particularly to a welding platform for motorcycle parts production, comprising a base; four clamping assemblies arranged in a rectangular pattern on the base, symmetrically arranged in pairs; and two limiting cylinders, each disposed on a corresponding clamping assembly, the two limiting cylinders fitting together to form a ring structure. In this invention, a third limiting plate is subjected to compressive force, causing it to slide upwards on the welding torch. Simultaneously, a sliding rod slides within a channel on the welding torch, approaching a pressure switch. When both pressure switches are triggered by the pressure of the sliding rod, an indicator light connected to the pressure switch illuminates. The operator uses the indicator light to determine if there is a deviation between the welding torch and the exhaust pipe on the welding assembly. If a deviation exists, corresponding adjustments are required to avoid incomplete welding due to positional errors.

This utility model discloses a positive and negative pressure switching fresh air system, comprising: an intake fan connected to an air distribution box via pipes, the air distribution box connected to the intake valves of each room via pipes and silencers; a return fan connected to a collection box via pipes, the collection box connected to the return air valves of each room via pipes; when the intake fan is turned on and all the intake and return air valves of all rooms are fully open, all rooms are in a positive pressure state; when the return fan is turned on and all the intake and return air valves of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are in a negative pressure state; when both the intake and return air fans are fully open, if room 1 opens its intake valve and closes its return air valve, room 1 is in a positive pressure state; if room 2 opens its return air valve and closes its intake valve, room 2 is in a negative pressure state; positive pressure rooms prevent virus intrusion, and negative pressure rooms prevent virus spillover; infected individuals live in negative pressure rooms, and uninfected individuals live in positive pressure rooms, which can prevent cross-infection among family members and is very suitable for the current virus transmission situation.

A pressure switch includes a pressure-resistant container made of metal, a conductive terminal disposed through the pressure-resistant container and fixed in airtight and insulating relation to the pressure-resistant container, a contact mechanism electrically connected to the conductive terminal and disposed inside the pressure-resistant container, a diaphragm covering an opening of the pressure-resistant container, mounted in airtight relation to the pressure-resistant container, capable of acting at a prescribed action pressure or more and returning at a return pressure lower than the action pressure, and a pressing member that opens and closes the contact mechanism by transmitting displacement of the diaphragm caused by action and return. The pressing member includes a first pressing member fixed to the contact mechanism and a second pressing member in contact with the diaphragm, and the first pressing member and the second pressing member are in contact in a manner that allows movement in a skew direction. The pressing member receives displacement of the diaphragm by the second pressing member, and transmits it to the contact mechanism and presses the contact mechanism via the first pressing member, thereby opening and closing the contact mechanism.

This application provides a defrosting control method, apparatus, heat pump water heater, and computer-readable storage medium for a heat pump water heater, relating to the field of heat pump water heater technology. The method includes: during the i-th defrosting operation of the heat pump water heater, if a high-pressure switch protection shutdown mechanism is triggered, obtaining a first defrosting duration of the heat pump water heater; during the (i+1)-th defrosting operation of the heat pump water heater, obtaining a second defrosting duration and a first heat exchange temperature, where the first heat exchange temperature is the inlet temperature of the outdoor heat exchanger during the (i+1)-th defrosting operation; before the second defrosting duration reaches the first defrosting duration, determining whether the outdoor fan speed adjustment timing has been reached based on the first defrosting duration, the second defrosting duration, and the first heat exchange temperature; and adjusting the outdoor fan speed when the speed adjustment timing is reached to reduce the high-pressure side pressure of the heat pump water heater. This application can reduce the probability of defrosting operation interruption, ensure the complete execution of the defrosting process, and improve the reliability of defrosting.

The present invention relates to a pressure switch (1) comprising: - a first electrical conductor (3a) and a second electrical conductor (3b) located at a distance from the first electrical conductor (3a), - a plunger (5) comprising a third electrical conductor (3c), the plunger (5) being movable in translation relative to the first and second electrical conductors (3a, 3b) between: - a first position in which the third electrical conductor (3c) is not electrically connected to the first electrical conductor (3a) and the second electrical conductor (3b), - a second position in which the third electrical conductor (3c) is electrically connected to the first electrical conductor (3a) and the second electrical conductor (3b), - a deformable diaphragm (6) configured to move the plunger (5) between the first and second positions under the effect of a pressure variation exerted by a fluid. Figure for the abstract: Fig. 1

This utility model relates to the field of hot-press welding equipment technology, and in particular to a hot-press welding device, including a device body. A human-machine interface is fixedly installed on the upper front end of the device body, a pressure switch is fixedly installed on the left front end of the device body, and a length measuring counter is fixedly installed in the middle section of the front end of the device body. It efficiently solves the problem of heating and cooling control, eliminates high-temperature adhesion issues, and adopts the low-voltage, high-current heating technology of a pulse welding machine. Compared with traditional heating tubes, it has significant advantages in terms of rapid heating speed and stable temperature control: the pulse current acts directly on the welding head to achieve rapid heating, avoiding the inefficiency caused by slow heat conduction in traditional heating tubes; by utilizing the instantaneous nature of pulse heating and the high efficiency of forced airflow cooling, it fundamentally reduces the risk of adhesion between the welding head and the frame due to prolonged high-temperature contact, improving the purity and structural stability of the weld interface.

The application discloses a novel overspeed protection device, which comprises a device body, wherein the device body comprises a base, a support device, an assembling table, a terminal mounting table, a terminal box and a protection device; the support device is provided in one group, and the support device is fixed on the top of the base through welding; the assembling table is fixed on the top of the support device through welding; the terminal mounting table is fixed on the front end of the assembling table through screws; the terminal box is fixed on the terminal mounting table through screws; and the protection device is installed on the top of the assembling table; the protection device comprises an integrated block, a first electromagnetic valve, a second electromagnetic valve, a hydraulic control reversing valve, a safety oil pipe, a pressure oil pipe, an oil return pipe, a pressure switch and a pressure gauge. The device can more accurately control the flow direction and pressure of oil, can quickly and accurately perform protection actions such as safety oil unloading when abnormal conditions such as overspeed occur, and can guarantee the safe operation of equipment and improve safety.

The application belongs to the technical field of fire fighting, and particularly relates to an adjustable rain valve pressure switch, which comprises a shell one and a shell two. A moving block for accommodating a pressing piece is arranged in the shell two. A rotating piece is rotatably connected to the shell one. An arc-shaped groove is arranged on the outer ring of the rotating piece. A pushing piece is arranged on the shell two and is opposite to the shell two. A cylinder is fixedly arranged on the support and is used for pushing the pushing piece downward. A protruding block is arranged on the pushing piece and is embedded in the arc-shaped groove and is used for pushing the rotating piece to rotate. After the device is used, the valve at the total gate of the fire water pipe is opened, water is continuously output, the rain valve and other valves are used at the same time, but the rain valve or special valve has insufficient pressure bearing capacity, or the pressure bearing forces of the valves are different. Therefore, when the water pressure needs to be increased for use of the individual valve, the valve with small pressure bearing capacity is automatically closed through the pressure switch, so that manual adjustment and closing are avoided.

The application discloses a kind of electric car power running system and method based on electrical control, it is related to electric car technical field, including electric control hydraulic subsystem, trailer hook device and control unit.In the application, when the traction hook is stressed, it will pull the poking component, the round boss in poking component pokes travel switch, travel switch converts mechanical signal into electrical signal and transmits to control unit, and control unit controls electric control hydraulic subsystem operation according to the electrical signal received, to realize the intelligent release and recovery of axle brake, this way avoids the complex pipeline arrangement in hydraulic control, can realize trailer function in minimum space, it is convenient to access whole vehicle electrical system to realize real-time display alarm, less fault is convenient to overhaul, accumulator cooperates with pressure switch to make system energy saving and pressure stable, it can also be perfectly combined with original vehicle braking system, and do not affect each other.

This utility model discloses a tank-type stacked pressure-free variable frequency secondary water supply device, relating to the technical field of water supply equipment. It includes a flow stabilizing tank, a pump assembly, a pressure stabilizing tank, and a detection assembly. The flow stabilizing tank is connected to the equipment's inlet pipe. The pump assembly is connected to the outlet pipe of the flow stabilizing tank and includes multiple pump units, each independently frequency-controlled, pumping water to the outlet pipe. The pressure stabilizing tank is connected to the outlet pipe and used to balance water pressure fluctuations. The pressure stabilizing tank includes a shell and multiple air chambers, each with a different internal pressure. The detection assembly, located on the outlet pipe, includes a pressure sensor and a pressure switch. The pressure sensor detects water pressure changes on the outlet pipe, and the pressure switch controls the start and stop of the pump units. The technical solution provided by this utility model aims to solve the problem of insufficient capacity of traditional large-capacity single-chamber tanks to cope with high-frequency pressure fluctuations, ensuring a stable water supply.

This invention relates to a radioactive contamination protection airflow distribution device and self-testing method with a self-testing alarm. An air inlet is used to introduce incoming airflow; a filter is connected to the air inlet to filter the incoming airflow; a self-testing alarm is installed downstream of the filter to detect the airflow pressure and activate the alarm when the airflow pressure exceeds a threshold range; the self-testing alarm includes a pressure switch, an electrical contact pressure gauge, a normally open relay, and an alarm. The parallel connection of the relay contacts and the pressure switch, along with the relay coil, forms a self-testing circuit, while the relay contacts, the electrical contact pressure gauge, and the alarm form an alarm circuit; a diverter is installed downstream of the self-testing alarm to divide the incoming airflow into multiple outgoing airflows; and an air outlet is used to output multiple outgoing airflows. This device achieves the goal of setting up an alarm and multiple contact switches in series and parallel to form a self-testing mechanism, thereby improving the safety of workers.

This utility model discloses a multifunctional pressure switch, comprising: a valve body, an intermediate body, and a valve cover. The valve body is provided with an inlet and multiple outlets; the intermediate body is provided with a valve core, and sealing elements are installed at the top and bottom of the valve core; the valve cover is provided with an air inlet. In this utility model, the end of the metal valve core is threadedly connected to the sealing elements by screws. The sealing elements can correspondingly control the sealing cavity formed between the intermediate body, the valve body, and the valve cover, thereby controlling the flow channel opening and closing and adjusting the opening degree. It is suitable for long-term high-frequency pressure fluctuation environments and effectively improves service life. The area difference between the valve core and the sealing diaphragm can form a high sealing specific pressure, so that even a small gas pressure can drive the valve core to move. It is suitable for small flow and high-precision control scenarios. When compressed air is injected, the valve opening degree can be linearly adjusted, thereby adapting to the dynamic pressure requirements of frequency conversion systems.

An assembly (100, 100') for a circuit (KL) with a gaseous or liquid medium, preferably for use in a heat pump, wherein the assembly (100, 100') is configured to include several adjacent components, comprises a housing (110) with at least one outlet (180) and at least one inlet (190). The housing (110) includes at least one connection (150, 160, 170) arranged on the housing (110). The assembly (100, 100') is connectable to a high-pressure sensor (152) and / or a high-pressure switch (162) and / or a filling valve (172) via a connection (150, 160, 170) each.

This invention discloses a switching control method for air compressor operating modes, specifically relating to the field of industrial air compressor unit control technology. The method involves acquiring pressure signals and analyzing their frequency and time domain characteristics to output fluctuation level parameters, thereby dynamically adjusting the pressure switching dead zone threshold and delay time. It also involves detecting the frequency of the variable frequency drive (VFD), calculating the compensation amount using a piecewise compensation function, and superimposing it onto the PID output to correct the pressure. Furthermore, it monitors slave unit unloading and pressure rebound, generating a virtual locking signal to prohibit all second slave units from unloading within a specified window. The method continuously calculates the absolute and net integrals of the error value, and when the absolute integral exceeds the threshold, it forcibly triggers a re-optimization of the scheduling strategy. This invention avoids frequent start-stop of slave units by dynamically adjusting the dead zone through fluctuation identification, corrects nonlinear distortion of the VFD through piecewise compensation, and locks the second slave unit to cut off the interlocking unloading during pressure rebound. Combined with error integral re-optimization parameters, this improves the air supply stability and equipment lifespan under high-frequency fluctuation conditions.

The application provides a full-automatic concrete injection reinforcing device, and relates to the technical field of tunnel concrete injection, which comprises a main injection part, a feeding protection part is installed on the main injection part; the main injection part is used for full-automatic injection of concrete; a gun head part is installed on the main injection part; a sleeve connection prompting part is installed on the gun head part; the sleeve connection prompting part is used for prompting the injection recoil force; low-pressure switches are used to conveniently prompt workers that the actual concrete injection pressure is too small, which can easily cause poor adhesion; the structure can directly detect and prompt the recoil force of concrete injection, and is more direct and standard; and the problems that the current concrete injection reinforcing device is difficult to control the injection distance and is inconvenient for automatic injection pressure quality prompting are solved.

The utility model discloses a cavity structure of positive and negative pressure switching, including cavity main part, vacuum ball valve module, first pipe line, second pipe line and the confluence seat, this cavity structure still includes the vacuum metering subassembly, the electric control pressure control subassembly, the positive pressure ball valve subassembly and the pressure relief valve subassembly all with the connection of confluence seat, vacuum ball valve module and the first mounting hole's junction is provided with the first sealing ring, the confluence seat is connected between first pipe line and second pipe line and is fixed to the cavity main part outside through the connecting plate side, and the internal chamber of confluence seat is communicated with the cavity main part, and vacuum metering subassembly is used for measuring the vacuum size of confluence seat inside, and the electric control pressure control subassembly is used for controlling the air pressure size of confluence seat inside. The utility model can realize big pressure difference and low vacuum work, accurate control pressure, quick response pressure switch, satisfy VR product display pasting to positive and negative pressure switching high efficiency, accurate demand, improve product quality and production efficiency.

This invention relates to the field of road construction machinery technology, specifically to a hydraulic control system and method for a screed used in a paver. The invention achieves multiple working modes by adjusting the control logic combinations of control valve blocks, pilot valves, lifting valves, speed control valves, synchronization valves, loop valves, load reduction pressure switch valves, left floating valves, right floating valves, right locking valves, and left locking valves to adapt to the performance requirements of various working stages during the paving process. This invention can automatically identify the stage and working condition of the paving operation, controlling each control valve to execute the corresponding control logic, enabling the hydraulic system to adaptively switch between multiple working modes, including pre-adjustment and synchronization mode, paving floating mode, active locking mode, and adaptive pressure adjustment mode. This invention achieves high-precision synchronization of screed pre-leveling, effectively solving construction problems such as difficulty in leveling ultra-wide screeds, asymmetrical paving indentations, and low-temperature start-up bulges, significantly improving paving quality and intelligence.

A rear-view device 100 for use with a vehicle, comprising a pivot system with at least two elements or arms, 110, 120, 130, being movable with respect to each other by at least one hinge H1, H2; wherein the pivot system comprises: at least one sensor 150 to detect movement of the pivot system; and a control unit in operative connection with the sensor 150. The sensor 150 is configured to provide three or more different and / or non-binary output values, the control unit is adapted to determine if there is damage or potential damage to the rear-view device 100 based on the sensor output values. Also disclosed is a vehicle with at least one external rear view device 100. The sensor 150 may comprise a pressure switch 152, 154 for detecting pressure in at least one of the elements 110, 120, 130.

This utility model discloses a pressure control system and a semiconductor processing device, relating to the field of semiconductor technology. The pressure control system includes a cavity with an inlet unit and an exhaust unit. The exhaust unit includes a vacuum pump and a connecting portion between the vacuum pump and the cavity. The connecting portion has a first valve body and a second valve body axially spaced apart. The first valve body includes a first valve plate for opening or closing the connecting portion. The second valve body includes an opening / closing element for adjusting the opening degree of the connecting portion. The first and second valve bodies are axially spaced apart, and the volume of the opening / closing element is smaller than that of the first valve plate, so that the moment of inertia of the opening / closing element is smaller than that of the first valve plate, allowing for rapid switching between at least two preset opening degrees. This utility model achieves rapid pressure switching through a small inertia structure, eliminating the need for a vacuum pump array, reducing equipment costs, and improving control reliability. It is applicable to semiconductor processes requiring pressure cyclic switching, such as atomic layer etching.

This invention provides an intelligent water distribution system adapted for water purifiers, relating to the field of water purification equipment technology. The system includes a composite filter element, an intelligent water distribution module, a low-flow water distribution module, and a high-flow water distribution module. The intelligent water distribution module includes a liquid flow component, a first one-way valve, a reverse osmosis filter element, and a high-pressure switch. The liquid flow component includes a pressure-reducing chamber, a first pure water chamber, and a second pure water chamber. The first pure water chamber is connected to both the pressure-reducing chamber and the second pure water chamber. The first one-way valve allows liquid to flow exclusively from the first pure water chamber to the pressure-reducing chamber. The inlet end of the reverse osmosis filter element is connected to the outlet end of the pressure-reducing chamber. The high-pressure switch is located at the purified water outlet end of the reverse osmosis filter element. The inlet end of the first pure water chamber and the high-flow water distribution module are both connected to the high-pressure switch. The composite filter element includes a pre-filter element located at the inlet end of the pressure-reducing chamber. The low-flow water distribution module is connected to the outlet end of the second pure water chamber. This invention enables multi-scenario water use of the water system and avoids frequent startup.

The utility model relates to a kind of high-pressure-resistant pressure switch in the technical field of pressure switch, including the metal shell of hollow, switch head, switch joint respectively being set in the both ends of metal shell, and switch assembly being set in the metal shell, switch assembly includes plastic shell, sealed switch body, pin, connector, pressure bag, diaphragm, cover plate, baffle, ejector rod and wire.The high-pressure-resistant pressure switch is matched by each element, can guarantee the sealing property, tightness and stability of each element connecting place, greatly improve the high-pressure-resistant capacity, anti-vibration capacity and anti-falling capacity of the pressure switch, ensure its monitoring accuracy and service life.

1. Name of the product in this design: Pressure Switch (EWPC-5). 2. Application of this design: Used for pressure control of water pumps such as QB series water pumps, booster pumps, and deep well pumps. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.