60 results about "Charge pumping" patented technology

The invention relates to the technical field of integrated circuits, in particular to a charge pump phase-locked loop circuit, a radar and a charge pump phase-locked loop locking control method.The circuit comprises a charge pump, the charge pump comprises a first branch circuit, a second branch circuit, a third branch circuit and a fourth branch circuit, the frequency sweeping state refers to the state when the frequency of the signal output by the phase-locked loop is linearly changed; the at least one second branch is connected to the first branch under the condition that the hopping amplitude of the frequency of the signal output by the phase-locked loop is greater than or equal to a preset amplitude threshold value so as to increase the magnitude of the current output by the charge pump, and is disconnected with the first branch when the phase-locked loop enters a frequency sweeping state; the circuit can effectively shorten the locking time of the phase-locked loop when the phase-locked loop has relatively large frequency hopping, and is beneficial to improving the response speed and performance of a system.

A work machine includes: a hydraulic actuator; a closed-circuit pump that is connected to the hydraulic actuator in a closed circuit, and supplies and discharges a hydraulic working fluid to and from the hydraulic actuator; an open-circuit pump that is connected to the hydraulic actuator in an open circuit, and supplies the hydraulic working fluid to the hydraulic actuator; a charge pump; a charge flow path that introduces the hydraulic working fluid delivered from the charge pump to the closed circuit; an excess fluid discharging device that discharges an excess hydraulic working fluid of the closed circuit to the charge flow path; and a controller that controls a delivery capacity of the closed-circuit pump and a delivery capacity of the open-circuit pump. The controller increases the delivery capacity of the open-circuit pump, or reduces the delivery capacity of the closed-circuit pump when a state of a pressure of the charge flow path has transited to be lower than a predetermined pressure threshold from equal to or higher than the predetermined pressure threshold, or when a state of the work device has transited to a state of performing the excavation work from a state of not-performing the excavation work.

The invention provides an open-closed loop smooth switching system based on a charge pump phase-locked loop, and the system comprises a reference clock fault detection module which is connected with the charge pump phase-locked loop and is used for detecting whether a reference clock breaks down or not and carrying out the fault indication control of the reference clock; the PLL locking detection module is used for carrying out locking indication control on a phase-locked loop according to the phase difference between the frequency division signal of the reference clock and the frequency division signal of the charge pump output clock; the ADC / DAC control module is used for carrying out charge pump open-loop auxiliary holding and charge pump phase-locked loop open-loop to closed-loop auxiliary release; and the PLL control state machine module controls a state machine to perform clock selection, entry of a holding state and exit of the holding state. According to the invention, fault information can be identified as early as possible, open-closed loop conversion and retention state entry or exit of the charge pump phase-locked loop are realized, the deviation between the reference clock obtained again by the charge pump and the initial frequency value is less than 0.15 ppm, switching is smoothly completed, and a subsequent circuit is not affected.

The invention discloses an underwater connector oil charging device and method based on cock sealing, and the oil charging device comprises a socket end oil charging device for charging oil to a connector socket end and a plug end oil charging device for charging oil to a connector plug end. The socket end oil charging device can be connected with the connector socket end and enables the two first oil charging passages to be communicated with the sealed accommodating cavity of the connector socket end, so that the connector socket end can be charged with oil through the first oil charging passages, and oil charging can be realized only by installing the connector socket end oil charging device and the socket end in place and opening an oil charging pump; the plug end oil charging device can be connected with the connector plug end and enables the two second oil charging passages to be communicated with the sealed cavity of the connector plug end, so that the connector plug end can be charged with oil through the second oil charging passages, and oil charging can be performed only by installing the connector plug end oil charging device and the plug end in place and opening an oil charging pump. The oil filling operation is simple, the oil filling efficiency is improved, the oil filling amount can be ensured, and bubbles are avoided.

A transmission system for a drilling machine includes a drive pump, a motor driven by the drive pump, a first fluid line that fluidly couples the motor with the drive pump, and a second fluid line that fluidly couples the motor with the drive pump. The transmission system also includes a charge pump in fluid communication with the drive pump, a fluid charge line that fluidly couples the charge pump with the drive pump, and an accumulator disposed in the fluid charge line. In an event of a change in a load on the transmission system, the accumulator is adapted to supply additional fluid towards at least one of the first fluid line and the second fluid line to prevent a reduction in a pressure in at least one of the first fluid line and the second fluid line below a recommended operating level of at least one of the drive pump and the motor.

A rectifier comprises a main rectifying chain having sequentially coupled NMOS and PMOS rectifying elements, a first active bias ladder and a second active bias ladder. The first active bias ladder may be coupled to a first charge pump and include first and second bias voltage tracking circuits. The first and second bias voltage tracking circuits may bias the first and last NMOS rectifying elements of the main rectifying chain. The first active bias ladder may act as a voltage divider, providing a bias to intermediate NMOS rectifying elements. Similarly, the second active bias ladder may be coupled to a second charge pump and include third and fourth voltage tracking circuits that bias the first and last PMOS rectifying elements. The second active bias ladder may also act as a voltage divider and provide a bias to intermediate PMOS rectifying elements.

The invention relates to the technical field of image sensor design, in particular to a cross coupling charge pump circuit and module applied to a CIS and a CIS module. The circuit comprises a charge pump part, an anti-leakage switch part and a compensation circuit part. The charge pump part adopts a cross coupling design, an auxiliary switch tube MN7 is arranged on a boosting path, and an auxiliary switch tube MN8 is arranged on a lower boosting path; on one hand, MN7 and MN8 are controlled through the anti-leakage switch part, normal boosting of the charge pump part is guaranteed, and reverse backflow is avoided by keeping the MN7-MN8 disconnected in the charge recovery stage, so that output ripples are reduced; on the other hand, different compensation signals VF are provided for the charge pump part in different stages through the compensation circuit part, normal boosting of the charge pump part is guaranteed, and in the charge recovery stage, the VF larger than VDD is applied to the charge pump part to complete voltage compensation so as to improve transient response.

Problem to be solved: To provide a hydraulic circuit for a construction machine capable of supplying hydraulic oil to a closed circuit without a charge pump. Means for solving the problem: The open circuit of the hydraulic circuit includes a hydraulic pump, a hydraulic actuator operated by hydraulic oil discharged from the hydraulic pump, a directional switching valve for switching a flow direction of the hydraulic oil from the hydraulic pump to the hydraulic actuator, a return line connecting the directional switching valve and a hydraulic oil tank, and a return check valve provided in the return line. The closed circuit of the hydraulic circuit includes a bidirectional hydraulic pump having a first port and a second port, a hydraulic motor operated by hydraulic oil discharged from the bidirectional hydraulic pump, a first line connecting the first port of the bidirectional hydraulic pump and the hydraulic motor, and a second line connecting the second port of the bidirectional hydraulic pump and the hydraulic motor. Between the open circuit and the closed circuit, a charge line connecting the return line and the first line via a first check valve and connecting the return line and the second line via a second check valve is provided.

The utility model provides a double-upward-drawing large-output continuous delivery pump which comprises a stock bin, a charging pump, a delivery pump, a terminal warehouse, a delivery air source and an instrument air source. The stock bin is connected with the conveying pump through the charging pump, and the charging pump is provided with an exhaust pipeline and communicated with the conveying pump through an upward guiding pipeline. The conveying pump is connected to the terminal library through a conveying pipeline; the conveying air source provides power for the charging pump and the conveying pump through air pipes, and the instrument air source monitors the material levels of the charging pump and the conveying pump; a hydrophobic separator is mounted at the starting point of the air source conveying pipeline and aims at reducing the water content of the air source conveying pipeline and improving the air dryness; an air supply device is additionally arranged at the descending stage of the conveying pipeline, so that the material descending speed can be reduced, the pipe blockage problem is effectively prevented, the pipeline layout is more flexible, and the device is particularly suitable for complex geographical environments; meanwhile, the overall elevation of the conveying pipeline is also reduced by using the air supply device, and the construction cost is reduced; according to the utility model, the stability and applicability of the conveying system are improved by additionally arranging the hydrophobic separator and the air supply device.

The present invention relates to a method for operating a hydraulic system (100) of a mobile working machine, wherein the hydraulic system (100) is provided with a hydraulic pump (2) which is connected to a hydraulic motor (4) via a first line (10) and a second line (11), wherein a bypass valve (99) is also provided which is positioned between the first line (10) and the second line (11) and is designed to prevent and permit hydraulic connection between the first and the second line (10, 11); wherein the hydraulic system (100) also comprises a charge pump (13) which is designed to supply pressurised fluid to the first and / or the second line (11) in order to compensate for fluid losses occurring during operation of the hydraulic system (100); characterised in that the method comprises the following steps: a) establishing a hydraulic connection between the charge pump (12) and the bypass valve (99) such that the bypass valve (99) can be controlled taking into account a charge pressure provided by the charge pump (12).

To provide a work machine capable of reducing costs and improving fuel efficiency.SOLUTION: A work machine 1 includes a hydraulic steering device 61, a refill oil passage 62, a charge pump 63, a discharge oil passage 64, a bypass oil passage 69, a variable relief valve 70, and a controller 51. The refill oil passage 62 refills oil to the hydraulic steering device 61. The charge pump 63 is disposed in the refill oil passage 62 and supplies oil to the hydraulic steering device 61. The discharge oil passage 64 discharges oil from the hydraulic steering device 61. The bypass oil passage 69 connects between a portion of the refill oil passage 62 downstream of the charge pump 63 and the discharge oil passage 64, and bypasses the hydraulic steering device 61. The variable relief valve 70 is disposed in the bypass oil passage 69. The controller 51 determines whether or not the vehicle is not turning, and when it determines that the vehicle is not turning, controls the variable relief valve 70 so that oil discharged from the charge pump 63 can pass through the bypass oil passage 69 at a pressure value lower than that during turning.SELECTED DRAWING: Figure 4

A work machine includes: a hydraulic actuator; a closed-circuit pump that is connected to the hydraulic actuator in a closed circuit, and supplies and discharges a hydraulic working fluid to and from the hydraulic actuator; an open-circuit pump that is connected to the hydraulic actuator in an open circuit, and supplies the hydraulic working fluid to the hydraulic actuator; a charge pump; a charge flow path that introduces the hydraulic working fluid delivered from the charge pump to the closed circuit; an excess fluid discharging device that discharges an excess hydraulic working fluid of the closed circuit to the charge flow path; and a controller that controls a delivery capacity of the closed-circuit pump and a delivery capacity of the open-circuit pump. The controller increases the delivery capacity of the open-circuit pump, or reduces the delivery capacity of the closed-circuit pump when a state of a pressure of the charge flow path has transited to be lower than a predetermined pressure threshold from equal to or higher than the predetermined pressure threshold, or when a state of the work device has transited to a state of performing the excavation work from a state of not-performing the excavation work.

1. The name of the product of this design: lithium battery air pump. 2. Purpose of the product of this design: used for inflating vehicle tires. 3. The design key point of this appearance design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The present invention discloses a viscous damper and method for preventing leakage of a long-span bridge under complex coupling loads. The damper comprises a fixing unit for connecting the damper; a damper unit arranged between the fixing units, comprising a main cylinder (6) and a sub-cylinder (10) which are nested and sealed and connected, and high-viscosity silicone oil (8) filled in the main cylinder (6); an exhaust energy storage unit, comprising an exhaust port (5) arranged on a side wall of the main cylinder (6), and an external hydraulic accumulator (20) connected to the exhaust port (5) through a thimble-type joint (22), which is used to exhaust the air in the main cylinder (6) and store energy; and an oil replenishment and pressure stabilization unit, comprising an oil replenishment port (9) arranged on the other side wall of the main cylinder (6), which is connected to an external oil replenishment pump (21) through a pipe joint (23). The damper of the present invention can quickly replenish the internal silicone oil after the damper leaks, so as to maintain the stable performance of the damper.

To provide a hydraulic circuit for a construction machine which can supply work fluid to a close circuit without a charge pump.SOLUTION: An open circuit 2a of a hydraulic circuit 2 includes: a hydraulic pump 4; a hydraulic actuator 6; a directional switch valve 8; and a return check valve 12 provided on a return line 10 for connecting the directional switch valve 8 and a work fluid tank 14. A close circuit 2b of the hydraulic circuit 2 includes: a hydraulic motor 30 operated by the work fluid ejected by a bidirectional hydraulic pump 28; a first line 32 for connecting a first port 28a of the bidirectional hydraulic pump 28 and the hydraulic motor 30; and a second line 34 for connecting a second port 28b of the bidirectional hydraulic pump 28 and the hydraulic motor 30. A charge line 44 is provided between the open circuit 2a and the close circuit 2b which connects the return line 10 and the first line 32 via a first check valve 46, and connects the return line 10 and the second line 34 via a second check valve 48.SELECTED DRAWING: Figure 1

The invention relates to an electric switching arrangement having a charge pump (NCP) which has at least two connection contacts (a1, a2), of which a first connection contact (a1) is connected to a first voltage potential (V1) and a second connection contact (a2) is connected via a series circuit, which has at least one first capacitor (C1), a second capacitor (C2) and a first diode (D1) arranged between the two capacitors, to a second voltage potential (V1) which is higher than the first voltage potential (V1) and which is also connected, via a switching element, to the first capacitor (C1), wherein the charge pump (NCP) has a third connection contact (a3), which is connected to an output (AK1) of a first comparator (K1) which has a first and a second comparator input (K1-, K1+), of which the first comparator input (K1-) is connected to an anode potential (refP) of a second diode (D2) at which the second voltage potential (V2) is applied and which is connected in series to the first diode (D1) and in parallel to the second capacitor (C2), and of which the second comparator input (K1+) is connected to a cathode potential (refN) of a third diode (D3) at the allocated anode of which the second voltage potential (V2) is applied.

The invention provides an axial force balancing device and a chemical volume charging pump, the axial force balancing device comprises a balancing disc, a balancing sleeve, a thrust bearing and a bearing seat, the balancing disc and the balancing sleeve are arranged on the outer side of a rotating shaft in a sleeving mode and installed on the medium side, and a first gap is formed between the balancing disc and the balancing sleeve in the axial direction of the rotating shaft; the thrust bearing is installed in the bearing seat, the rotating shaft is further sleeved with a non-driving-end bearing body and a non-driving-end bearing gland, one end of the bearing seat abuts against the non-driving-end bearing gland, and a second gap is formed between the other end of the bearing seat and the non-driving-end bearing body; at least one elastic piece is arranged in the second gap, the elastic piece is in a compressed state, and the two ends of the elastic piece abut against the bearing seat and the non-driving end bearing body respectively. According to the balancing device, the elastic piece is arranged in the second gap, the axial force is completely borne by the balancing disc, the thrust bearing does not bear the axial force of the pump and only bears the elastic force of the elastic piece, and therefore automatic adjustment of the first gap is achieved, and the axial force is dynamically balanced all the time.

The utility model discloses an oxidation purification system of a nuclear power unit, which comprises a system interface, a first pressure regulating valve, a capacity control box, a charging pump, a low-pressure discharge pipeline, a purification pipeline, a charging pipeline and a bypass pipeline, the two ends of the purification pipeline are connected to the first pressure regulating valve and the capacity control box respectively, and the two ends of the charging pipeline are connected to the capacity control box and the charging pump respectively. According to the nuclear power unit oxidation purification system, the system structure is optimized through redundancy design, the safety and reliability of system operation and the maintainability of the system are guaranteed, part of equipment can adapt to the hydraulic characteristics and operation requirements of the improved system after being redesigned, the purification flow can be improved, the overhaul period can be shortened after optimization, and the maintenance cost is reduced. The economic benefit is obvious.

The invention belongs to the technical field of energy collection, and particularly relates to a mechanical energy collection device based on a bionic structure and a preparation method thereof. The mechanical energy collecting device comprises a polytetrafluoroethylene planar film, a water film, a first electrode, a second electrode, a carbon black film and a porous polytetrafluoroethylene film, the carbon black film is arranged on the porous polytetrafluoroethylene film, the first electrode and the second electrode are arranged on the carbon black film, the water film is arranged on the carbon black film, and the polytetrafluoroethylene planar film is arranged on the water film. According to the invention, the porous membrane is loaded with carbon black to form an electric bilayer with a random porous microstructure, and an ion transport mechanism of a natural plant is simulated. Along with the increase of the pressure, the contact area of the micro-structure electric double-layer coupling capacitor in the solid-liquid channel is increased, and the stored charge quantity is correspondingly increased, which is similar to a liquid charge pump mechanism, so that the energy conversion efficiency of the device is improved.

1. The name of the product of this design: lithium battery air pump. 2. Purpose of the product of this design: used to inflate tires, balloons, etc. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

The utility model discloses a shell structure of a charge pump, which relates to the technical field of charge pumps and comprises a lower shell, an upper shell and pins, the upper shell is mounted on the lower shell, the pins are mounted on two sides of the upper shell, and side combined heat dissipation structures are arranged on four side surfaces of the lower shell. Through mutual cooperation of the side combined heat dissipation structure, the upper combined heat dissipation structure, the side heat conduction columns, the upper heat conduction columns, the lower shell heat conduction layer and the upper shell heat conduction layer, heat inside and outside the charge pump shell can be rapidly transferred, and heat generated in the charge pump can be rapidly conducted out in the operation process of the charge pump. In order to avoid influence on normal operation of the charge pump and shortening of the service life of the charge pump due to overhigh temperature of the charge pump, the bottom heat dissipation fin plate is arranged and can support the lower shell, so that a certain heat dissipation channel is reserved at the bottom of the lower shell, the bottom surface of the charge pump can effectively dissipate heat, and the service life of the charge pump is prolonged. And the heat dissipation efficiency of the charge pump is improved.

The invention provides a chemical volume charging pump driving system which comprises a driving motor and a water turbine, the driving motor is provided with a driving shaft, and one end of the driving shaft is connected with a chemical volume charging pump; the water turbine is provided with a rotating shaft and a water bucket mounted on the rotating shaft; the rotating shaft is coaxially connected with the other end of the driving shaft; wherein the water turbine is provided with a nozzle, the nozzle is connected with a small-flow circulating pipeline of the chemical volume charging pump, and the nozzle is used for spraying the received high-energy liquid to the water bucket to drive the rotating shaft to rotate, so that the output of the driving motor is reduced. According to the chemical-volume charging pump driving system, the water turbine is arranged on one side of the driving motor, and the water turbine and the chemical-volume charging pump rotate in the same direction, so that a small-flow circulating high-energy medium originally wasted by the chemical-volume charging pump does work on the water turbine, shaft power output by the water turbine is fed back to the chemical-volume charging pump, and the shaft power consumed by the driving motor is reduced; the efficiency of the pump unit is improved.

[Problem] To provide a hydraulic circuit of a construction machine that can supply hydraulic oil to a closed circuit even without a charge pump. [Solution] An opening circuit of a hydraulic circuit includes a hydraulic pump, a hydraulic actuator operated by hydraulic oil discharged from the hydraulic pump, a direction switching valve switching a flow direction of the hydraulic oil from the hydraulic pump to the hydraulic actuator, a return line connecting the direction switching valve and a hydraulic oil tank, and a return check valve provided on the return line. A closed circuit of the hydraulic circuit includes a bidirectional hydraulic pump having a first port and a second port, a hydraulic motor operated by hydraulic oil discharged from the bidirectional hydraulic pump, a first line connecting the first port of the bidirectional hydraulic pump and the hydraulic motor, and a second line connecting the second port of the bidirectional hydraulic pump and the hydraulic motor. A charge line connecting the return line and the first line via a first check valve and connecting the return line and the second line via a second check valve is provided between the open circuit and the closed circuit.

The utility model discloses a series hydraulic pump, which relates to the technical field of hydraulic elements and comprises a plurality of hydraulic pumps, each hydraulic pump comprises a branch pump and a shell, the branch pumps are arranged in the shells, the shells of the hydraulic pumps are sequentially connected, the branch pumps on the hydraulic pumps are sequentially connected in series, one hydraulic pump is provided with an oil supplementing pump, and the other hydraulic pump is provided with an oil supplementing pump. The hydraulic pump with the oil supplementing pump is a rear pump, a shell of the rear pump comprises a shell body and a shell cover, a maintenance opening is formed in one side of the shell body, the shell cover is detachably connected to the shell body and can seal the maintenance opening, each branch pump is provided with two oil openings, and an oil outlet of the oil supplementing pump can be communicated with at least one oil opening in each branch pump. An oil inlet of the oil supplementing pump is used for introducing hydraulic oil. The series hydraulic pump is lower in maintenance cost and longer in service life.

This invention discloses a fractional phase-locked loop (PLL) based on multi-path quantization noise compensation. It introduces a data synchronization circuit based on the falling edge of the reference clock, ensuring that the divider signals of all paths have reached steady state before the phase detector is triggered by the next rising edge of the PFD, thus completely eliminating dynamic timing interference in the mixed-signal path. By introducing a multi-path retimer with a sign bit, the compensable quantization noise range is expanded. The current-DAC type charge pump proposed in this invention adopts a charge pump architecture based on a source switch array and a static discharge current. The source switch array utilizes the low impedance characteristics of the source nodes of the current source transistors, significantly improving the switching speed and reducing the settling time. The static discharge current forces the loop to maintain a fixed non-zero phase offset in the locked state, permanently shifting the charge pump operating point out of the nonlinear region and deeply suppressing fractional spurious emissions.

A reverse osmosis system and method of operating the same includes a membrane housing comprising a reverse osmosis membrane therein. The membrane housing has a feed fluid input, a brine outlet and a permeate outlet; The system further includes a charge pump, a plurality of valves and a tank having a volume comprising a movable partition dividing the volume into a first volume and a second volume. The plurality of valves selectively couples the charge pump to the first volume or the second volume and the brine outlet to the second volume or the first volume respectively.

An intelligent test system for a stepless speed regulation hydraulic drive chassis, wherein a closed drive test circuit includes an engine, a transfer case, a variable pump, a closed drive test branch, and electromagnetic reversing valves 1, 3, and 4; a closed oil replenishment circuit includes an oil replenishment pump, an oil replenishment pressure regulating valve, and balance branches 1 and 2; an open drive test circuit includes a proportional overflow valve 1, an open drive motor 1, an open drive motor 2, a magnetic powder brake 2, a tension controller 2, a magnetic powder brake 3, a tension controller 3, and electromagnetic reversing valves 5, 6, 7, 8, and 10; and a cooling circuit includes a cooling pump, an electric clutch, a drive motor, a check valve 3, a cooling overflow valve, a back pressure valve, a cooler, a temperature sensor, an accumulator, and electromagnetic reversing valves 9 and 11. The system can provide a test platform for both a hydraulic open drive circuit and a hydraulic closed drive circuit, and at the same time, it can realize a dynamic load loading process, and can provide reliable technical support for the design of a stepless speed regulation hydraulic drive chassis.

The invention provides a charge pump control method and a charge pump. The charge pump comprises an input end, at least two stages of cascaded pump circuits, an output circuit and an output end which are connected in sequence, controlling the charge pump to operate in a single-stage and multi-stage pump switching mode; detecting the input voltage of the input end; and judging whether the input voltage exceeds a preset reference value, if so, controlling the charge pump to operate in a single-stage pump mode, and if not, controlling the charge pump to operate in a multi-stage pump mode. In the single-stage pump mode, only one-stage pump circuit works, and in the multi-stage pump mode, the multi-stage pump circuit works; in the operation process of the charge pump, a working pump circuit is controlled, so that the pump circuit is switched between a charging state and a discharging state; in the multi-stage pump mode, the charging state and the discharging state of the last-stage pump circuit and the charging state and the discharging state of the other at least one-stage pump circuit are mutually opposite. According to the technical scheme, switching between the single-stage pump mode and the multi-stage pump mode can be achieved according to the magnitude of the input voltage, and the balance between the loading capacity and the efficiency is achieved.

The embodiment of the application provides a drum washing machine and a control method thereof, relates to the related technical field of washing equipment, and is used for realizing customization of a door closing sound. The drum washing machine provided by the embodiment of the application comprises an outer drum, a door seal, an energy absorption cavity, an air charging pump, a pressure relief valve, a pressure sensor and a controller. The energy absorption cavity is connected with the door seal. The air charging pump is connected with the energy absorption cavity through a hose and an air charging hole reserved in the door seal, is used for increasing a pressure value in the energy absorption cavity, and the pressure relief valve is used for reducing the pressure value in the energy absorption cavity. The controller is configured to: in response to receiving a trigger instruction selected by a user, determining a pressure preset value according to a sound type corresponding to the trigger instruction; and controlling the air charging pump or the pressure relief valve to operate, so that the pressure value in the energy absorption cavity reaches the pressure preset value. The drum washing machine provided by the embodiment of the application can determine the pressure value in the energy absorption cavity according to the sound type selected by the user, and then make the door closing sound when the door is closed reach the sound effect customized by the user.

1. The name of the design product: switch (on the switch of the charge pump). 2. The use of the design product: the design product is used for the switch on the charge pump. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.