893 results about "Pressure switch" patented technology

The utility model discloses a filter element, an intelligent water purifier and a backwashing method of the intelligent water purifier, the filter element comprises a shell, a filter membrane assembly and a positioning terminal, and the positioning terminal abuts against and prevents the inlet end face of the filter membrane assembly from being extruded by reverse water flow to move, twist, deform and damage; the intelligent water purifier comprises a controller, a filter element, a purified water pressure tank, an electromagnetic valve and a water pump, the water pump presses raw water or seawater into the filter element for purification, and produced purified water is pressed into the purified water pressure tank; the filter element backwashing method further comprises a high-pressure switch, a pollution discharge throttle valve and a pollution discharge electromagnetic valve, the high-pressure switch triggers the controller to open the pollution discharge electromagnetic valve, and sewage is discharged through the pollution discharge throttle valve, so that purified water released by the purified water pressure tank is divided into two paths to appropriately flow back to the backwashing filter element. According to the intelligent water purifier, the filter element and the method for backwashing the filter element, the effects of saving water and reducing emission can be achieved, the purpose that the filter element can filter for a long time and does not need to be replaced is achieved, consumption of the multi-stage filter element is reduced, and the problem of peculiar smell caused by a traditional dirt hiding and containing filtering mode is solved.

A fall protection compliance system includes a connection structure configured for interfacing an anchor structure and a connection sensor associated with the connection structure. The connection sensor includes an accelerometer or a pressure switch, where the connection sensor is configured to monitor continued connection of the connection structure to the anchor structure over a period of time and to output a signal indicating said continued connection.

The invention discloses a pressure switch fatigue test system and method based on data analysis, and relates to the field of switch pressure test. The method comprises the following steps: S1, constructing an instantaneous pressure regulation factor based on a preset target pressure value and a current pressure deviation, and superposing external disturbance compensation to generate a real-time pressure signal; s2, based on the real-time pressure signal, an analog current signal is generated through nonlinear coupling, the dynamic proportion of the pressure to the current change rate is synchronously adjusted, and the corrected current change rate is output; s3, comparing the real-time pressure signal with a preset pressure threshold value, judging the on-off state of the switch, and performing cumulative statistics on the on-off times of the switch; s4, based on the real-time pressure and current signals, fatigue damage is dynamically evaluated through a stress-strain feedback model, and the switch fatigue degree is calculated in an accumulated mode to generate an accumulated fatigue damage strength index. Through fusion of dynamic regulation and control, current synchronization and a damage integration mechanism, working conditions are accurately simulated, nonlinear damage is quantified, and test authenticity and life reliability are improved.

The invention relates to the technical field of forklift control, and discloses a control system and a control method of a standing plate type pallet truck. A pressure state signal of a hydraulic oil way is obtained through a pressure switch, a load state is judged, and a power mode is selected through a mode selection switch; and the controller controls the forklift to run according to the set acceleration running curve or brake according to the braking running curve according to different vehicle running states. The pressure switch is used for recognizing the light-load and heavy-load working conditions of the vehicle, the maximum speed of the light load of the vehicle is increased according to different load conditions and different power modes, the braking distance of the vehicle under different loads and the running stability of the vehicle are ensured, and the service life of the vehicle is prolonged. Therefore, the working efficiency of the vehicle is improved, the purposes of smooth driving and safe and smooth braking of the vehicle are achieved, and various control requirements of a user on high efficiency, safety, comfort and the like of the vehicle under different working conditions are met.

The invention relates to the technical field of air pressure switches, in particular to an air pressure switch, a power distribution module, a battery pack and a thermal runaway alarm method of the battery pack. At least part of the diaphragm assembly is conductive, the diaphragm assembly divides an inner cavity of the shell into a first cavity and a second cavity which are separated from each other, and the shell is provided with a first vent hole communicating the first cavity with the outside of the shell; the number of the connecting terminals is at least one, and the connecting terminals are arranged in the second cavity; and the diaphragm assembly is configured to move along with the air pressure difference between the first chamber and the second chamber, so that the conductive part of the diaphragm assembly is in contact with or separated from the connecting terminal. According to the air pressure switch provided by the invention, the detection sensitivity of the air pressure switch is improved, and the accuracy of pressure detection alarm is further improved.

The invention relates to the technical field of automobile safety control, and discloses a brake detection method and system, a vehicle and a computer readable storage medium. The brake detection method comprises the steps that a brake switch signal and an air pressure switch signal are obtained; based on the brake switch signal and the air pressure switch signal, whether a brake request exists or not is judged; wherein if any one of the following conditions is met, it is judged that the brake request exists: the brake switch signal is in an effective state and a brake switch normally-closed fault is not triggered; the air pressure switch signal is in an effective state and does not trigger an air pressure switch normally-closed fault; the brake switch signal and the air pressure switch signal are both in an effective state. The brake intention recognition accuracy and the system reliability are effectively improved by obtaining the brake switch signal and the air pressure switch signal and judging whether the brake request exists or not based on the double-switch redundancy logic.

A device (7) for regulating the delivery volume of a positive displacement pump (1) comprises a control piston (8) displaceable in a recess (9) and a cam ring (4), via the position of which the delivery volume of the positive displacement pump (1) can be adjusted. A pressure switching valve (12) is arranged in a leakage line (11) connected to the recess (9). This pressure switching valve closes the leakage line (11) when a specific pressure acting on it is exceeded.

The invention relates to the technical field of intelligent control and predictive maintenance of heating water heaters, in particular to a wind pressure switch control system and method for a heating water heater. The method comprises the following steps of: extracting a starting pressure curve slope, a steady-state pressure fluctuation frequency spectrum entropy and a shutdown pressure decay time constant by collecting a time sequence pressure signal in a working period of a fan so as to generate a dynamic feature vector; comparing the vector with a preset reference health vector by the system, and resolving the health state confidence and the state deviation drift rate of the system in real time; when the health confidence coefficient is lower than a safety threshold value or the deviation drift rate is too high, the system executes forced safety locking; if the health degree is slightly reduced, the pre-purging time of the fan is actively prolonged as compensation; according to the method, conversion from fault response to predictive maintenance is achieved, early performance degradation symptoms such as fan abrasion and air duct dust deposition can be recognized in advance, post-maintenance is converted into beforehand intervention, and the fault rate and maintenance cost are effectively reduced.

The present invention relates to a safety device for a reversible heat pump device (10) with a refrigerant circuit coupled to a heat transfer circuit (20) via a first heat exchanger (13). The safety device comprises a first pressure switch for monitoring the pressure of a refrigerant in the refrigerant circuit of the heat pump device (10) and a temperature switch for monitoring the temperature of the refrigerant in the refrigerant circuit of the heat pump device (10). The first pressure switch comprises a first switch (S1) configured to open when the refrigerant pressure is less than a first predetermined pressure limit. The temperature switch comprises a second switch (S2) configured to open when the refrigerant temperature exceeds a predetermined temperature limit.The first switch (S1) is arranged in parallel to the second switch (S2), so that the power supply to the heat pump device (10) is interrupted if the first switch (S1) and the second switch (S2) are open.

The invention discloses an air distribution device for semiconductor processing and an air supply system thereof. The air distribution device comprises an air distribution block, a plurality of air distribution pipelines communicated with the air distribution block, and automatic pressure control valve assemblies arranged in the air distribution block, wherein the number of the automatic pressure control valve assemblies is the same as that of the air distribution pipelines; an air inlet channel and a plurality of air distribution channels communicated with the tail end of the air inlet channel are arranged in the air distribution block; an automatic pressure control valve assembly is arranged in each gas distribution channel, and the automatic pressure control valve assemblies automatically control the gas distribution opening degree of the gas distribution channels according to the current pressure of the gas distribution channels. The automatic pressure switch valve is arranged in the gas distribution block, the opening degree of each gas distribution channel can be kept consistent, so that the output gas flow is the same, meanwhile, as the automatic pressure switch can adjust the opening degree according to the gas pressure, when the pressure of the gas storage tank is reduced, the injection pressure of the gas outlet can still be kept, and finally the uniformity and high pressure of the gas quantity of each sub-chamber are realized. And the film deposition quality is improved.

The utility model discloses a concentrated water zero-discharge reverse osmosis (RO) water purifier which comprises a main pipeline, a domestic water pipe, a first connecting pipe, a second connecting pipe and a third connecting pipe, and a water outlet of the main pipeline is sequentially connected with a front filtering device, a first electromagnetic valve, a pressure stabilizing valve, an activated carbon filter, an RO filter and a first check valve; a first high-pressure switch and a pure water faucet; the other water outlet of the main pipeline is connected with a domestic water pipe; the RO reverse osmosis filter is sequentially connected with a concentrated water electromagnetic valve, a second high-pressure switch, a second check valve and the domestic water pipe; a concentrated water temporary storage box is connected between the second high-pressure switch and the second check valve through a first connecting pipe, a second connecting pipe is connected between the concentrated water electromagnetic valve and the second high-pressure switch, and the second connecting pipe is sequentially connected with a second electromagnetic valve and a third connecting pipe. Concentrated water generated by filtration of the RO reverse osmosis filter is temporarily stored in the concentrated water temporary storage tank, and the concentrated water in the concentrated water temporary storage tank can flow to a domestic water pipe to be used as domestic water.

The invention relates to the technical field of power distribution cabinets, and provides a self-cleaning thermal power distribution cabinet heat dissipation dustproof filter screen device which comprises a power distribution cabinet main body, the power distribution cabinet main body comprises a cabinet body, two filter screen main bodies are arranged on the outer surface of the cabinet body, and the self-cleaning thermal power distribution cabinet heat dissipation dustproof filter screen device further comprises a control part, a heat dissipation part, a transmission part and a cleaning part. The heat dissipation piece and the cleaning piece can be switched between a first state and a second state. When the temperature in the cabinet body reaches a threshold value, a temperature control air bag is completely unfolded and extrudes a pressure switch, so that a driving motor drives fan blades to rotate, a driving gear drives a driven gear to rotate through teeth, and a connecting rod, a base plate and a cleaning brush are driven by a connecting plate to continuously move up and down; the cleaning brush periodically rubs the outer surface of the filter screen main body, so that holes formed in the filter screen main body are kept unblocked, shutdown disassembly and cleaning are not needed, and shutdown loss is avoided.

The utility model provides a pulse type oxygen supply device which comprises a controller, an oxygen supply pressure sensor, a passenger cabin pressure sensor and a plurality of mask assemblies. Each mask assembly comprises a mask, a pressure switch and an electromagnetic valve; a breathing pipeline of the mask is connected with an air source of the aircraft, an electromagnetic valve for controlling on-off is arranged on the breathing pipeline, and a pressure switch is further arranged on the breathing pipeline; the electromagnetic valve and the pressure switch are both connected with the controller; the controller is further connected with the passenger cabin pressure sensor and the oxygen supply pressure sensor. The pressure switch is used for detecting pressure in the mask pipeline, and when the pressure is lower than preset pressure, an oxygen supply demand instruction is sent to the controller; the controller is used for generating an opening instruction of the electromagnetic valve corresponding to the pressure switch according to detection values of the passenger cabin pressure sensor and the oxygen supply pressure sensor when an oxygen supply demand instruction sent by any pressure switch is detected, and the opening instruction comprises the opening duration of the electromagnetic valve. Respiration demand feedback is added into oxygen supply time regulation, and oxygen supply demand changes are met by controlling the opening and closing time of the electromagnetic valve according to different height requirements.

The invention provides a hydrogen-doped natural gas pipeline leakage monitoring system and method, a medium and a product, and relates to the technical field of natural gas pipelines, the system comprises a gas supply assembly, a processor, an electric control valve, a pipeline and a switch valve arranged on the pipeline, the processor is connected with the gas supply assembly and the pipeline, and the electric control valve is connected with the gas supply assembly and the pipeline; the gas supply assembly is used for providing mixed gas containing hydrogen and methane in different proportions; the electric regulating valve is used for regulating the mass flow rate and the pressure of the mixed gas; the switch valve is used for adjusting the hole diameter of the mixed gas leaked in the pipeline transmission process; and the processor is used for monitoring and collecting leakage parameters of the mixed gas in the pipeline transmission process under different working conditions. Experimental data and theoretical support are provided for pipeline leakage monitoring and safety evaluation, the detection sensitivity of hydrogen-doped natural gas leakage is improved, and possible losses are reduced.

The invention discloses a mechanical sensing deflagration risk early warning device and method for an oil-immersed distribution transformer, the device comprises a control unit and a signal acquisition device, the signal acquisition device comprises a temperature sensing device, a liquid level sensing device and a pressure sensing device, the temperature sensing device comprises a temperature switch, and the liquid level sensing device comprises a pressure sensor. The liquid level sensing device comprises a liquid level switch, the pressure sensing device comprises a pressure switch, the control unit comprises a logic module, a power supply module, a sound module and a light emitting module, the logic module is connected with the temperature switch, the liquid level switch and the pressure switch through signal cables, and the logic module judges collected temperature, liquid level and pressure signals firstly and then sends the judged signals to the control unit; after an early warning condition is met, the sound module and the light-emitting module are controlled to give an alarm; the method comprises the following steps: S1, starting a system; s2, monitoring a signal; and S3, performing judgment and early warning. The device is good in performance, long in service life, high in efficiency and capable of achieving early fault early warning of the distribution transformer and eradicating deflagration accidents.

The utility model provides a water purifying device and a water purifying system. The water purifying system comprises a filtering device, a water inlet pipeline, a water outlet pipeline and a flushing pipeline, the water inlet pipeline is provided with a water inlet valve and a water pump; the flushing pipeline is provided with a pure water storage device and a flushing one-way valve; a water outlet check valve, a high-pressure switch and a water outlet valve are arranged on the water outlet pipeline; the water inlet valve and the water pump are controlled by the high-pressure switch; when the water outlet valve is opened, the high-pressure switch is closed, the water inlet valve and the water pump work, and pure water is discharged through the water outlet valve; when the water outlet valve is closed and the high-pressure switch is switched on, the water inlet valve and the water pump work, pure water enters the pure water storage device, when the high-pressure switch is switched off, the water inlet valve and the water pump stop working, and water in the pure water storage device flushes the filtering device. Water outlet or flushing of the water purifying device can be controlled through the water outlet valve, water outlet and flushing states can be controlled by operating the water outlet valve, electric appliance accessories are few, cost is saved, and the failure rate and the maintenance rate caused by the electric appliance accessories are reduced.

The present invention belongs to the technical field of rail trains, and relates to a rail train hydraulic brake system slow-release device. The present invention also relates to a control method for a rail train hydraulic brake system slow-release device. A reversing valve module (A) includes a shuttle valve (1), a first pressure switch (2), and a second pressure switch (3). A manual pump module (B) includes a manual pump (4), an oil tank (5), and a pressure relief valve (6). The shuttle valve (1) is connected to the oil tank (5) through a first pipeline (7). A manual pump (4) is provided on the first pipeline (7). The shuttle valve (1) is connected to an auxiliary relief unit (9) through a second pipeline (8). The shuttle valve (1) is connected to a clamp (11) through a third pipeline (10). The first pipeline (7) is connected to the pressure relief valve (6). The rail train hydraulic brake system slow-release device of the present invention is easy to operate, can reliably complete relief and braking, effectively prevents the risks caused by misoperation and forgetting to restore the gear position, and reduces the probability of misactivation.

The utility model relates to the field of industrial automation control, in particular to a speed regulator control system with an interlocking function, which comprises a shutdown interlocking valve, the shutdown interlocking valve is communicated with an emergency shutdown valve through an oil way pipeline, and an oil way between the shutdown interlocking valve and the emergency shutdown valve is communicated with a second pressure switch. A fourth pressure switch used for controlling the shutdown interlocking valve to be opened or closed is arranged on the shutdown interlocking valve, the shutdown interlocking valve is communicated with a control pressure oil way, the control pressure oil way is communicated with a related digital valve through an oil way pipeline, and the emergency shutdown valve is communicated with a hydraulic control reversing valve through an oil way pipeline. By introducing automatic components such as the interlocking valve, the pressure switch and the pressure transmitter, linkage and interlocking functions of the water turbine multistage system assembly and the speed regulating system can be achieved, and the safety level and the risk resistance of a water turbine control system are improved.

The utility model discloses a dispensing controller adaptive to various closed-loop servo motor drive and screw valves. The dispensing controller comprises a main board, a gas input port, a positive pressure regulating valve, a negative pressure regulating valve, a positive and negative pressure switching electromagnetic valve, a negative pressure interface, an output port, a motor drive board, a touch display screen and a power supply module, the gas input port is communicated with the positive pressure regulating valve through a pipeline, and the negative pressure port is communicated with the negative pressure regulating valve through a pipeline; the positive and negative pressure switching electromagnetic valve is communicated with the positive pressure regulating valve, the negative pressure regulating valve and the output port through pipelines; the main board is electrically connected with the control end of the positive and negative pressure switching electromagnetic valve, the motor driving board, the touch display screen and the power module. According to the utility model, the touch display screen interaction mode is adopted, so that the operation becomes visual and simple, and an operator can quickly operate without complicated training. The parameter setting process is easily completed through touch operation, the equipment debugging time is greatly shortened, and the production efficiency is improved.

The invention relates to an oxygen supply device for a deep-sea manned vehicle and an operation method, and belongs to the technical field of deep-sea manned equipment. The pneumatic booster pump is driven by the air compressor to pressurize low-pressure oxygen, high-temperature and high-pressure oxygen is cooled by waste gas of the booster pump, flow regulation, pressure monitoring and safety control are realized by integrating the mobile console, and the mechanical pressure switch, the safety valve and the manual unloading valve are configured to guarantee operation safety. The customized metal hose is adopted to connect the external oxygen source and the to-be-supplemented device, additional refrigeration equipment is not needed, and the oxygen supply system has the advantages of efficient cooling and energy reuse and is suitable for long-distance and high-safety oxygen supply operation in the deep sea complex environment.

The utility model discloses a breathing machine pipeline condensate water monitoring drainage device which comprises a storage assembly, a plugging drainage assembly, a water level monitoring assembly and a liquid level sensor, the plugging drainage assembly is arranged at the bottom of the storage assembly, the water level monitoring assembly is arranged in an inner cavity of the storage assembly, and the liquid level sensor is arranged in the inner cavity of the storage assembly. The plugging and liquid discharging assembly comprises a plugging block, a limiting clamping groove, a sealing block, a first spring, a motor and a water discharging pipe, and the water level monitoring assembly comprises a mounting cylinder base, a pressure switch, a sliding groove, a connecting rod, a second spring, a buoyancy float and a sliding block. The breathing machine pipeline condensate water monitoring and draining device has the advantages of being good in monitoring effect and having an automatic draining function, and solves the problems that when medical workers are busy, condensate water cannot be poured out in time, if the condensate water is not poured out in time, the bacterial concentration is increased, the condensate water flows back to cause VAP, and the working efficiency of the medical workers is improved. Excessive condensate water can influence ventilation of a patient and pollute a pipeline.

1. The name of this design product: pressure switch. 2. Purpose of this design product: used to control pressure. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides a gas filtering and pressure stabilizing dual module which realizes dual functions of gas purification and pressure stabilization and ensures the accuracy of a result obtained by an analysis instrument. The gas filtering and drying device comprises an inlet, a filtering and drying part and an outlet; the pressure stabilizing module comprises an input port, a pressure stabilizing cavity, a pressure stabilizing valve and an output port; the integrated module comprises a feeding port, a pressure switch and a discharging port, and the pressure switch is externally connected with the control module; an inlet of the gas filtering and drying device is in butt joint with a gas output port of a gas cylinder through a first pipeline, the gas filtering and drying device removes particles and moisture in gas, and an outlet of the gas filtering and drying device is connected with an input port of the pressure stabilizing module through a second pipeline. The pressure stabilizing module is used for stabilizing the pressure of the gas output through the second pipeline, and the gas subjected to pressure stabilizing operation is output through an output port of the pressure stabilizing module and is connected to a feeding port of the integrated module through a third pipeline.

A buffering air cylinder with a stroke limiting detection function is characterized by comprising a cylinder barrel, a front end cover is arranged at the front end of the cylinder barrel, a rear end cover is arranged at the rear end of the cylinder barrel, buffering sealing rings are arranged on the front end cover and the rear end cover, and the buffering sealing rings, a buffering plunger on a piston and the piston form a front buffering air chamber and a rear buffering air chamber. A rod cavity air inlet communicated with the front buffer air chamber is formed in the side wall of the front end cover, and a front end air pressure detection port communicated with the interior of the cylinder barrel is formed between the side wall of the front end cover and the front buffer air chamber; a rodless cavity air inlet communicated with the rear buffer air chamber is formed in the side wall of the rear end cover, and a rear end air pressure detection port communicated with the interior of the cylinder barrel is formed between the side wall of the rear end cover and the rear buffer air chamber; a piston rod is arranged at the front end of the piston and penetrates through the front end cover; and an air pressure sensor or an air pressure switch is arranged in the front-end air pressure detection port or the rear-end air pressure detection port.

The utility model discloses a portable tool set for bus maintenance, which comprises a box body formed by splicing a front box cover and a rear box cover, single edges of the front box cover and the rear box cover are hinged with each other, and a rechargeable battery box, a lithium battery, a processor, a storage unit, a Bluetooth module and a plurality of appliance grooves for placing detection instruments or tools are arranged in the box covers. A touch pressure switch which can be in contact with the surface of the placed detection instrument and is extruded is arranged in the instrument groove for placing the detection instrument, the rechargeable battery box, the lithium battery, the Bluetooth module, the touch pressure switch and the storage unit are all electrically connected with the processor, and the detection instrument is provided with the Bluetooth module. And the touch switch feeds back a switch signal to the processor through contact or extrusion. And if the detection instrument is taken out for use, the processor knows that the detection instrument is taken out for use, further instructs to drive the Bluetooth module arranged in the box cover to actively search the Bluetooth module corresponding to the detection instrument, is connected with the Bluetooth module, returns detection data acquired by the detection instrument, and places the detection data into the storage unit, so that automatic data reading and storage are realized.

The present invention provides a pressure switch that can prevent the detachment of a working plate and improve the pressure resistance even when an excessive pressure is applied to a pressure follower portion, thereby suppressing the breakage of the pressure follower portion and preventing the leakage of a pressure medium. The pressure switch (1) includes: a limit shaft (7) provided in a direction parallel to the axial direction of a fulcrum (2a) near a working plate (4) inside a main body (2); and an anti-offset stopper (9) provided at a position on the working plate (4) closer to the end side of a lateral side portion (4b) than the limit shaft (7), and restricts the movement of the working plate (4) by the anti-offset stopper (9) abutting against the limit shaft (7) even when an excessive pressure is applied to the bellows (3).

The present application provides a method, device and vehicle for detecting filter faults in a CVT transmission. When executing this method, the pressure value of the filter is first obtained, and then when the pressure value is greater than the pressure switch threshold and the pressure value is less than the blocking pressure switch threshold, the oil filling time of the hydraulic pump and the pressure building time of the hydraulic pump are obtained; then, according to the current engine parameters, the corresponding standard oil filling time and standard pressure building time are determined from the preset standard comparison table; finally, when the difference between the oil filling time and the standard oil filling time is less than or equal to the preset oil filling time difference range and the difference between the pressure building time and the standard pressure building time is less than or equal to the preset pressure building time difference range, it is determined that the filter has not failed. In this way, the present application further determines whether the filter is actually blocked by the oil filling time and the pressure building time of the hydraulic pump, thereby improving the accuracy of detecting filter faults.

A pneumatic clutch control device of a railway vehicle comprises an air supply pipeline and a two-position three-way electromagnetic valve. The air supply pipeline is communicated between a main air reservoir of the railway vehicle air compression system and an air inlet of the pneumatic clutch; two ports of the two-position three-way electromagnetic valve are communicated with the air supply pipeline, and the other port of the two-position three-way electromagnetic valve is introduced into external atmosphere; a pressure switch I is arranged on the air supply pipeline between the two-position three-way electromagnetic valve and the pneumatic clutch; the set value of the pressure switch I is greater than the minimum value of the normal working pressure of the pneumatic clutch; a non-backpressure one-way valve and a pressure stabilizing air cylinder are sequentially arranged on the air supply pipeline between the main air cylinder and the two-position three-way electromagnetic valve; the pressure stabilizing air cylinder is provided with a second pressure switch, and the set value of the second pressure switch is larger than the maximum value of normal working pressure of the pneumatic clutch. And the controller can receive signals of the first pressure switch and the second pressure switch so as to control the two-position three-way electromagnetic valve. The boosting time of the clutch air cavity is shortened, friction plate loss in the boosting process is reduced, and the pressure is more stable when the pneumatic clutch works.

This application relates to a drinking water device and its operating method. The drinking water device includes: a water purifier having a first inlet and a first outlet; a water dispenser having a second inlet, with the first outlet connected to the second inlet; and a water ejector having a second outlet, a third inlet, and an ejector end connected to each other. The second outlet is connected to the first inlet, the third inlet is connected to an inlet pipe, and the ejector end is connected to the second inlet end via a one-way valve. A negative pressure is generated at the ejector end to drive the one-way valve to open, thereby allowing purified water from the first outlet end to flow back to the first inlet end. This application diverts a portion of the purified water flow from the rear end of the water purifier back to the front end, solving the problem of frequent pressure changes at the rear end of the water purifier triggering a pressure switch and causing frequent starts of the water purifier due to the flow rate difference between the water dispenser and the water purifier.

The utility model discloses an unmanned aerial vehicle tower climbing anti-falling quick self-locking mechanism, which belongs to the technical field of power transmission line iron towers, and comprises a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged in an inverted U shape, a connecting block is fixed at the top between the first clamping piece and the second clamping piece, and a supporting column is fixed at the top of the connecting block. A hanging ring is fixed to the top of the supporting column, a pressure switch is installed at the top end in the hanging ring and connected with a driving motor sequentially through a relay and a contactor, the driving motor is arranged on the outer side face of the second clamping piece, an output shaft of the driving motor is connected with a locking device, and the power phase sequence of the driving motor is controlled through the pressure switch. The locking and unlocking of the locking device are further controlled; through the combination of the pressure switch, the motor and the lock hook, when the unmanned aerial vehicle is hung on the hanging ring, the lock hook can be opened and closed through forward rotation and reverse rotation of the pressure switch and the trigger motor, and when the lock hook is closed, rapid self-locking can be directly carried out.