1140 results about "Pressure switch" patented technology

The invention relates to the technical field of loader brake valves, and discloses a hydraulic brake valve and a hydraulic system thereof.The hydraulic brake valve comprises the hydraulic brake valve, the hydraulic brake valve is composed of a one-way valve, a brake valve set, a brake lamp pressure switch, a low-pressure alarm pressure switch, a shuttle valve, a high-low pressure unloading valve and a throttling hole, and the high-low pressure unloading valve and the throttling hole are integrated; a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch are arranged outside the hydraulic brake valve. A liquid filling valve is omitted, an oil source of the full-hydraulic power braking system is taken from an existing priority valve CF port of equipment, pressure feedback signals are selected through a shuttle valve on a hydraulic braking valve, the pressure feedback signals are transmitted to the priority valve, and liquid filling and energy supplementing of the full-hydraulic power braking system or steering work of a steering system is achieved. The brake has the remarkable advantages of being fast in brake response, low in noise, low in failure rate, high in safety coefficient, compact in structure, low in cost and low in energy consumption.

The invention provides a mobile water sample collection device, which belongs to the technical field of sampling equipment, and comprises a sampler, a thrower and a traction rope, the sampler is used for collecting a water sample; the thrower is used for throwing the sampler to a target position; one end of the pulling rope is connected with the sampler and used for pulling the sampler; wherein the sampler comprises a floating body, a depth rope, a sampling cylinder, a flexible valve, a negative pressure assembly and a negative pressure switch assembly, and the floating body is connected with a traction rope and used for floating on the water surface; one end of the depth rope is connected with the floating body; the sampling cylinder is connected with the other end of the depth rope so as to limit the water taking depth through the depth rope; a water inlet is formed in the sampling cylinder; the flexible valve is arranged on the water inlet and seals the water inlet in a natural state; the negative pressure assembly is arranged on the sampling cylinder and is used for providing negative pressure for the sampling cylinder, so that the sampling cylinder absorbs water from the flexible valve; the negative pressure switch assembly is connected with the negative pressure assembly so as to start the negative pressure assembly to form negative pressure. The device is flexible and convenient to use and high in maneuverability.

The invention discloses an unmanned mining dump truck hydraulic braking system and a control method. The unmanned mining dump truck hydraulic braking system comprises a service brake valve set and a parking brake valve set. The service brake valve group comprises a first hydraulic proportional pressure reducing valve, a second hydraulic proportional pressure reducing valve, a first shuttle valve and a first pressure sensor; the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are connected in parallel; oil outlets of the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are communicated with an oil inlet of a first shuttle valve; an oil outlet of the first shuttle valve is connected with a first pressure sensor; the parking brake valve group comprises an electromagnetic directional valve, a redundant electromagnetic directional valve and a pressure switch; the electromagnetic directional valve is a normally closed valve, and the redundant electromagnetic directional valve is a normally open valve; the electromagnetic directional valve and the redundant electromagnetic directional valve are connected in series, the electromagnetic directional valve is connected with an oil inlet pipeline, the redundant electromagnetic directional valve is connected with an oil outlet pipeline and a parking brake caliper, and a pressure switch is arranged on the oil outlet pipeline.

The utility model discloses a grease lubrication pump. The structure of the grease lubrication pump is simplified and more compact. The grease lubrication pump comprises a pump base, an oil tank, a driver, a plunger assembly, a driven piece and a pressure switch, the oil tank, the driver and the pressure switch are installed on the pump base, a pump oil flow channel, an oil outlet flow channel and a trigger flow channel are arranged in the pump base, the pump oil flow channel is communicated with the oil outlet flow channel, and the trigger flow channel is communicated with the oil outlet flow channel. The plunger assembly is arranged in the oil pumping flow channel and installed at the output end of the driver, the driver drives the plunger assembly to slide in the oil pumping flow channel in a reciprocating mode, so that oil in the oil tank is sucked into the oil pumping flow channel under the action of negative pressure, the sucked oil is pushed out to the oil outlet flow channel for oil pumping, and the driven piece is arranged in the triggering flow channel and aligned with the pressure switch. The driven piece is pushed by oil in the triggering flow channel to extend out of the pump base, and the driven piece is pushed by oil with certain pressure to press the triggering pressure switch.

The invention belongs to the field of wall type tangential combustion, and discloses a wall type tangential combustion method and system for combusting inferior coal, which can automatically adjust the gas amount and the air door opening by monitoring the pressure, the oxygen content and the gas flow in a hearth in real time. The accurate adjustment can ensure the optimal mixing proportion of the gas and the air, gas waste is avoided, the combustion efficiency is improved, and therefore the heat efficiency of the boiler is improved. The flame state information is continuously collected, the gas amount is adjusted in combination with flame stability, it is guaranteed that the combustion process is always in the optimal state, unburnt fuel and excessive discharged waste gas are reduced, and therefore the overall heat efficiency is improved. The combustion process is monitored in real time through the air pressure switch, the gas flow sensor, the flame ionization electrode and the like, and the gas amount and the air door opening degree are dynamically adjusted according to feedback signals. The automatic adjusting function can ensure that combustion is always in a stable and efficient state, and excessive or insufficient gas supply is avoided.

Methods of filling a gap with a dielectric material including using an inhibition plasma during deposition. The inhibition plasma increases a nucleation barrier of the deposited film. The inhibition plasma selectively interacts near the top of the feature, inhibiting deposition at the top of the feature compared to the bottom of the feature, enhancing bottom-up fill. A process chamber may have multiple pressure switches to enable a process after deposition at a higher pressure than the pressure during deposition.

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 oil filter cleanliness detection device comprises an oil pan, an oil filter is fixedly installed on the left side of the oil pan, a main pressure cavity is formed in the left side of the oil pan and located on the right side of the oil filter, a steel plate is fixedly installed on the upper side of the oil pan, and a paper pad is arranged between the oil pan and the steel plate. An oil filter valve body is fixedly installed on the upper side of the steel plate, an oil filter valve element is slidably connected into the oil filter valve body, a pressure detection hole is formed in the upper side of the oil filter valve body, a pressure switch is fixedly installed on the upper side of the pressure detection hole, a spring is fixedly installed on the right side of the oil filter valve element, and an oil filter aluminum pad is fixedly installed on the right side of the oil filter valve body. The left side of the oil filter aluminum pad clings to one end of the spring away from the oil filter valve core. By means of the mode, the oil filter valve element can be pushed to move through the oil pressure difference, an oil way can be in the on-off state, the oil pressure is detected only through the pressure switch, an additional sensor is not needed, and the cleanliness of the automatic gearbox oil filter is judged.

The invention relates to the field of tire type walking equipment, and discloses a load-sensitive hydraulic brake valve and a load-sensitive hydraulic system thereof, and the load-sensitive hydraulic system comprises the load-sensitive hydraulic brake valve, a load-sensitive pump, a priority valve, a steering hydraulic system, a working hydraulic system, a shuttle valve and corresponding connecting pipelines; a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch are arranged outside the load-sensitive hydraulic brake valve. According to the system, full-hydraulic dynamic braking can be achieved on equipment without a prefill valve, the equipment efficiency is improved, the installation cost is reduced, the energy consumption is reduced, and the service life is prolonged. Wherein the load-sensitive hydraulic brake valve integrates a brake function, a pressure maintaining function, a high-low pressure switching function, a pressure signal selection function and a pressure alarm function; the invention has the advantages of fast braking response, low noise, low failure rate, high safety coefficient, compact structure, low cost, low energy consumption and long service life.

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 discloses an inflation pump starting and stopping control method and device, electronic equipment and a medium, and relates to the field of control. According to the scheme, a dryer pressure switch is additionally arranged in an original braking system of a new energy vehicle, and the pressure switch state of the dryer pressure switch is related to the braking pressure value of the air inlet end of an air cylinder; the brake pressure value in the air cylinder is related to whether the electric blast pump needs to be controlled to start and stop, so that whether the electric blast pump needs to be controlled to start or stop is judged according to the obtained brake pressure value in the air cylinder of the new energy vehicle and the pressure switch state of the dryer pressure switch of the new energy vehicle; and the electric inflating pump is controlled to be started or stopped according to the judgment result, so that the starting and stopping of the electric inflating pump are accurately controlled, and the safety of the scheme is improved.

The invention relates to the technical field of medical cleaning disinfectors, in particular to a disinfector capable of recovering heat energy and draining water at low temperature and a pipeline control system. Comprising a cabin body, a pure water tank and a waste water tank, the pure water tank is arranged at the upper end of the cabin body, the waste water tank is arranged at the lower end of the cabin body, one side of the cabin body is connected with two peristaltic pumps, the two peristaltic pumps are connected in parallel, the two peristaltic pumps are connected with two liquid level floating balls, and a pressure transmitter is arranged at the upper end of the cabin body and connected with a circulating pump. The circulating pump is connected with the lower end of the cabin body, an air heating box is arranged between the pressure transmitter and the circulating pump, the air heating box is connected with a high-efficiency filter, and a second wind pressure switch is arranged between the air heating box and the high-efficiency filter; according to the integrated design, heat energy of disinfected water is recycled, and meanwhile low-temperature drainage is achieved.

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 utility model discloses a wire harness isolation plate hole site detection clamp, and relates to the technical field of clamps. Comprising an air cylinder, an air pressure switch valve, a product hole site profiling plate, hollow pipes, a mounting plate and an air pipe, the air cylinder is connected with the air pressure switch valve through the air cylinder, a piston rod of the air cylinder is connected with the mounting plate, the air cylinder is arranged on the fixed supporting frame, and the hollow pipes are arranged on the mounting plate. And the upper end of the hollow pipe is connected into a hole of the product hole site profiling plate. The device is reasonable in structural design, can accurately detect the hole site of the wire harness isolation plate, effectively meets the processing precision requirement, does not generate deviation, and is high in reliability.

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.

The invention discloses a wafer vacuum chuck calibration method and device, wafer detection equipment and a storage medium. The wafer vacuum chuck calibration method comprises the steps that in the vacuum breaking process of a wafer vacuum chuck, a negative pressure switch is controlled to be in an off state, a positive pressure switch is controlled to be in an on state, and a first time point when the positive pressure switch is in the on state and a second time point when the air pressure of the chuck reaches a first air pressure value are obtained, according to the first time point and the second time point, determining the time duration of positive pressure conduction; and obtaining a third time point when the air pressure of the suction cup reaches a second air pressure value after the air pressure of the suction cup passes through the zero point, and obtaining a third air pressure value after the vacuum breaking of the wafer vacuum suction cup after the third time point, so as to determine that the vacuum breaking of the wafer vacuum suction cup reaches a safe air pressure threshold value based on the third air pressure value. The vacuum breaking speed of the wafer vacuum chuck is increased, and the material safety is improved.

The present invention discloses a bogie axle box for high-speed trains with an overload self-adjusting structure, comprising a bogie housing, an axle box housing, a gauge changing mechanism, and further comprising: an air spring, the air spring being located at the gap between the bogie housing and the axle box housing; a support member for reducing the friction between the axle box housing and the axle box support rail, the support member being arranged at one end of the axle box housing in contact with the axle box support rail; a first groove, the first groove being arranged on the outside of the axle box housing; a detection member acting on the first groove and the sunken track of the track changing device, and being able to inform the driver of the gauge changing state. In the present invention, when the gauge change is completed and the wheel pair distance is adjusted, the second connecting rod is separated from the pressure switch under the elastic action of the first spring and the second spring, thereby disconnecting the circuit, reminding the operator in the control room that the limit pin has been re-locked, and the real-time state of the gauge changing operation can be effectively informed to the operator in the control room.

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 provides a laser aging detection method and device, and the method comprises the steps: receiving a pressure signal of a to-be-detected laser group for triggering a pressure switch in response to a received aging command, and opening an electromagnetic valve in response to the pressure signal, so as to enable cooling water in a light receiving cylinder to circulate; switching on the laser group to be detected, and determining a first aging state according to the flow of the cooling water; determining a second aging state of the to-be-detected laser group through an external interface of the to-be-detected laser group; calling state data in the laser group to be detected, and determining a third aging state according to the state data; and after a preset time period, aging detection is stopped, and a detection result is uploaded. Safe aging and automatic testing of the laser are achieved, the laser testing efficiency is improved, laser data are inquired in real time in the aging process, aging is automatically stopped when the data are abnormal, and the accident occurrence probability is reduced.

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 utility model belongs to the technical field of engineering machinery auxiliary equipment, and particularly relates to a grease lubricating system based on PLC control, which comprises a PLC, a lubricating device, an oil pressure switch and a low oil level switch, a signal input terminal of the PLC is respectively connected with the oil pressure switch and the low oil level switch, and a signal output terminal of the PLC is connected with the lubricating device; the oil pressure switch is installed at the tail end of the lubricating pipeline and used for collecting oil pressure signals of the tail end of the lubricating pipeline. The low-oil-level switch is installed on the outer side of the oil tank and used for collecting low-oil-level signals in the oil tank. According to the utility model, the intermediate relay for controlling the oil pump is connected to the output module of the PLC, and the oil pressure switch and the low oil level switch are connected to the input module of the PLC, so that the start or stop of the lubricating motor is automatically controlled, and the low oil level switch is used for detecting an oil level signal; when the oil level is low, an alarm is automatically given, and the oil pump does not work under the condition that the chain oil inlet pump is started to prevent faults.

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 invention relates to the field of sensors, and provides an intelligent water device with cleaning, dust suppression and fire protection functions for a railway grinding wagon, the intelligent water device comprises a water tank and a water pump, the output end of the water pump is communicated with a pressure regulating valve, a high-pressure flushing pipe and a low-pressure spraying pipe, and when the water pump conveys water in the water tank into a pipeline, the water pressure of the water in the pipeline is detected through a preset pressure gauge; the pressure regulating valve is regulated according to the detected water pressure value, and when the water pressure is regulated to a washing and cleaning preset value by the pressure regulating valve, the pipeline is connected with the high-pressure washing pipe, so that the ground rail surface of the railway is washed and cleaned; when the water pressure is adjusted to a dust falling preset value by the pressure adjusting valve, the pipeline is connected with the low-pressure spraying pipe, so that dust falling is performed on the ground rail surface of the railway; high-pressure and low-pressure switching is achieved through multiple sets of pressure regulating valves, and the device is used for low-pressure dust suppression and high-pressure cleaning. Compared with a traditional method, high and low pressure switching under different operation requirements is met, the limitation of functions in the prior art is broken through, the low-temperature adaptability is high, and the water pipe is prevented from frost cracking due to expansion of frozen water.

The invention belongs to the technical field of heating and ventilation equipment, and particularly relates to an outdoor unit assembly, a heating and ventilation equipment outdoor unit and heating and ventilation equipment. The outdoor unit assembly is used for the heating and ventilation equipment and comprises a refrigerant system, a heat exchange system and a heat exchange system, the tank body is communicated with the compressor exhaust port or the compressor air return port through a refrigerant pipeline; and the at least one functional part is mounted on the tank body and comprises at least one of a pressure sensor, a temperature sensor, a pressure switch and a valve body. According to the technical scheme, the at least one functional component is integrally arranged on the tank body, and one or more functions are achieved, so that the size of the outdoor unit assembly can be reduced, the use amount of pipelines of the outdoor unit assembly can be reduced, and therefore the cost can be reduced.

The multifunctional water purifier comprises an outer shell, a microcomputer controller is installed in the outer shell, a waterway control assembly comprises a first low-voltage switch installed at a water inlet of the outer shell, the first low-voltage switch is electrically connected with a water inlet electromagnetic valve, and the water outlet end of the water inlet electromagnetic valve is connected with a filtering mechanism; the filtering mechanism comprises a PE filter element and a multi-medium filter element, the water outlet end of the high-pressure water pump is connected with an RO membrane filter, the water outlet end of the RO membrane filter is connected with a three-water-outlet combined water nozzle through a first high-pressure switch, the water outlet end of the RO membrane filter is connected with a waste water flushing electromagnetic valve, and the three-water-outlet combined water nozzle is connected with the electrolytic bath, so that purified water can be provided, and the water quality of the electrolytic bath is improved. The water purifier is simple in structure, convenient to operate and capable of preparing electrolyzed reduced water and oxygen-enriched disinfectant fluid, the requirements of users for various functional water are met, different types of water can be prepared through convenient switching in the same equipment, and the problems that an existing water purifier is single in function and cannot meet diversified water requirements are effectively solved.

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.