CN114893386A - Water pump control system, method, storage medium and processor - Google Patents
Water pump control system, method, storage medium and processor Download PDFInfo
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- CN114893386A CN114893386A CN202210734180.0A CN202210734180A CN114893386A CN 114893386 A CN114893386 A CN 114893386A CN 202210734180 A CN202210734180 A CN 202210734180A CN 114893386 A CN114893386 A CN 114893386A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 claims description 24
- 230000009467 reduction Effects 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0209—Rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The application relates to a water pump control system, a method, a storage medium and a processor, relating to the technical field of water pump control and comprising a control module, a pressure module, a rotating speed module, a timing module, a recording module and a comparison module, wherein the pressure module detects the water pressure P at a water outlet and sends the water pressure P to the comparison module for comparison, when P is more than Pmin, the timing module counts down the time length T, when T returns to zero, if the fluctuation of P is less than Pu, the recording module records the pressure value P0 at the moment, the control module sends a deceleration signal to the rotating speed module to control the rotating speed of the motor to be reduced to N1, and sends a timing signal to the timing module 3 to count down the time length T1, when the countdown T1 returns to zero, the recording module records the pressure P1 at the current water outlet, the comparison module calculates the difference value delta P between P1 and P0, and if the delta P is smaller than Pn, the control module sends a stop signal to the rotating speed module to control the motor to stop. This application has the advantage of avoiding when the user does not use water, the problem that the water pump still can't be shut down takes place.
Description
Technical Field
The present disclosure relates to the field of water pump control technologies, and in particular, to a water pump control system, a water pump control method, a storage medium, and a processor.
Background
The automatic booster pump is a common device for household pipeline boosting, and has the basic functions that when a user uses water, the water pump starts boosting, and when the user does not use water, the water pump stops and sleeps.
For the existing mode of controlling the pump to automatically start and stop based on the pressure sensor, the condition that the pump cannot be stopped when the water pressure at the inlet of a user fluctuates and the total water pressure after the water pump is pressurized is smaller than a set value exists, even if the user stops using water at the moment, the water pump still continuously applies work to heat water in a pipeline, energy is wasted, and adverse phenomena such as noise are brought.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present application to provide a water pump control system, method, storage medium and processor that have the advantage of avoiding the problem that the water pump still cannot be shut down when the user is not using water.
The above object of the present application is achieved by the following technical solutions:
a water pump control system comprises a control module, a pressure module, a rotating speed module, a timing module, a recording module and a comparison module, wherein the pressure module is used for detecting water pressure P at a water outlet and sending the water pressure P to the comparison module for comparison, when P is larger than a minimum value Pmin, a timing signal is sent to the timing module, the timing module performs countdown with the duration of T after receiving the timing signal sent by the comparison module, when T returns to zero, if fluctuation of P is smaller than Pu, the recording module records the pressure value P0 at the moment and sends a control signal to the control module, the control module sends a deceleration signal to the rotating speed module after receiving the control signal, the rotating speed module controls the rotating speed of a motor to be reduced from the current rotating speed N0 to N1 after receiving the deceleration signal, sends the timing signal to the timing module 3, performs countdown with the duration of T1, and when the countdown T1 returns to zero, the recording module records the pressure P1 at the current water outlet, the comparison module calculates the difference value delta P between P1 and P0, if the delta P is smaller than the judgment threshold Pn, the control module sends a stop signal to the rotating speed module, and the rotating speed module controls the motor to stop after receiving the stop signal.
By adopting the technical scheme, when P is larger than the lowest value Pmin during the operation of the water pump, the user is in a water use stage, the fluctuation of P is smaller than Pu within T time, the user is in a stable water use stage, therefore, the pressure value of the matter is recorded as P0, after the motor is decelerated and T1 time, the difference value delta P between the water pressures P1 and P0 at the water outlet is calculated, and when the delta P is not larger than the judgment threshold Pn, the user is indicated to stop water use, so that the water pump is controlled to stop, and the situation that the water pump cannot stop when the total water pressure is smaller than the set value after the water pump is pressurized can be avoided.
The present application may be further configured in a preferred example to: if the delta P is larger than the judgment threshold Pn, the control module sends a recovery signal to the rotating speed module, and the rotating speed module controls the motor to recover to the highest rotating speed after receiving the recovery signal.
By adopting the technical scheme, when the user uses water, the motor reduces the rotating speed, the pressure provided by the water pump is reduced, the total pressure can be obviously reduced due to the pressure relief effect of the water outlet part, so that the water outlet part (user water) can be judged, when the delta P is larger than the judgment threshold Pn, the user water is indicated, the motor is recovered to the highest rotating speed, and the user water use experience is better.
The present application may be further configured in a preferred example to: the motor speed reduction control device is characterized by further comprising a period module, wherein the period module is used for recording the number M of times that the speed reduction module receives the speed reduction signals, when the M is not less than 1, the current rotating speed of the motor is greater than the lowest rotating speed Nmin, the Delta P is less than a judgment threshold Pn, the control module sends the speed reduction signals to the speed rotation module, and when the current rotating speed of the motor is less than the lowest rotating speed Nmin, the Delta P is less than the judgment threshold Pn, the control module sends a stop signal to the speed rotation module.
By adopting the technical scheme, namely in the using process, the influence of the reduction of the motor rotating speed on a user can be effectively reduced in the process of continuously using water by comparing the current motor rotating speed with the minimum rotating speed Nmin and enabling the Delta P to be smaller than the judgment threshold Pn.
The present application may be further configured in a preferred example to: the water pressure control device comprises a sampling module, when the delta P is not greater than a judgment threshold Pn, the sampling module sends a timing signal to a timing module, the timing module performs countdown with the time length of T2 after receiving the timing signal sent by the sampling module, the sampling module obtains the current water pressure P1 detected by a pressure module for many times and transmits the current water pressure P1 to a comparison module in the process of resetting T2 to zero, the comparison module calculates the difference delta P between P1 and P0 after receiving the P1 transmitted by the sampling module, and if the delta P is not greater than the judgment threshold Pn, the control module sends a stop signal to a rotating speed module.
By adopting the technical scheme, in the using process, in order to reduce errors, after the time delta P is not greater than the judgment threshold Pn, the water pressure at the water outlet is sampled for multiple times within the time T2, the difference value delta P between the water pressure and the time P0 is calculated, when the time delta P is not greater than the time Pn, the user stops using water, and the errors are smaller through sampling within a period of time, so that the probability of error halt caused by the errors is reduced.
A water pump control method includes the steps of obtaining water pressure P at a water outlet, comparing the water pressure P with a lowest value Pmin, counting down for a time length T if the water pressure P is not smaller than the lowest value Pmin, recording a pressure value P0 at the time if fluctuation of P is smaller than Pu when T returns to zero, controlling the rotating speed of a motor to be reduced from a current rotating speed N0 to N1, then counting down for a time length T1, recording a current pressure P1 at the water outlet when T1 returns to zero, calculating a difference delta P between P1 and P0, and controlling the motor to stop if the delta P is smaller than a judgment threshold Pn.
The present application may be further configured in a preferred example to: and if the delta P is larger than the judgment threshold Pn, controlling the motor to recover to the highest rotating speed.
The present application may be further configured in a preferred example to: recording the number M of times of reduction of the rotating speed of the motor, controlling the motor to reduce the speed n on the basis of the current rotating speed when the M is not less than 1 and the current rotating speed of the motor is greater than the minimum rotating speed Nmin and the Delta P is less than a judgment threshold Pn, and controlling the motor to stop when the current rotating speed of the motor is less than the minimum rotating speed Nmin and the Delta P is less than the judgment threshold Pn.
The present application may be further configured in a preferred example to: and when the delta P is not greater than the judgment threshold Pn, performing countdown with the time length of T2, acquiring the current water pressure P1 for many times and calculating the difference delta P between P1 and P0 in the process of resetting to zero by the countdown T2, and if the delta P is not greater than the Pn, controlling the motor to stop.
A storage medium comprising a stored program, wherein the program executes the control method described above.
A processor for executing a program, wherein the program executes the control method described above.
Drawings
Fig. 1 is a schematic diagram of the present application.
Fig. 2 is a schematic flow chart of the present application.
Reference numerals: 1. a control module; 2. a rotation speed module; 3. a timing module; 4. a period module; 5. a comparison module; 6. a recording module; 7. a sampling module; 8. and a pressure module.
Detailed Description
The present application is described in further detail below with reference to fig. 1-2.
The application discloses water pump control system, including control module 1, pressure module 8, rotational speed module 2, timing module 3, record module 6, comparison module 5, cycle module 4 and sampling module 7, pressure module 8 installs in the delivery port department of water pump for pressure sensor in this embodiment, and the delivery port department of water pump is equipped with the check valve that switches on the direction in the water pump. When the water pump works, the pressure module 8 is used for detecting the water pressure P at the water outlet and sending the measured water pressure P to the comparison module 5, the comparison module 5 compares the water pressure P with a preset water pressure minimum value Pmin after receiving the water pressure P sent by the pressure module 8, when P is larger than the minimum value Pmin, the comparison module 5 sends a timing signal to the timing module 3, the timing module 3 counts down the timing signal sent by the comparison module 5 for a duration T, when T is zero, if the fluctuation of P is smaller than a preset value Pu, in the embodiment, the fluctuation of P is smaller than the Pu's finger, in the counting down for the duration T, the pressure module 8 detects the pressure Pc at the water outlet for a plurality of times, the sampling module 7 obtains a plurality of pressure values Pc detected by the pressure module 8 and sends the pressure values Pc to the comparison module 5, the comparison module 5 calculates the difference value with P after receiving the plurality of pressure values Pc, when the difference values of Pc and P are all smaller than Pu, the fluctuation of P is smaller than Pu. The comparison module 5 sends a recording signal to the recording module 6, the recording module 6 records a pressure value P0 at the moment after receiving the recording signal and sends a control signal to the control module 1, the control module 1 sends a deceleration signal to the rotation speed module 2 after receiving the control signal, the rotation speed module 2 controls the current rotation speed N0 of the rotation speed of the motor to decrease N to N1 after receiving the deceleration signal and sends a timing signal to the timing module 3, the timing module 3 performs countdown with the time length T1 after receiving the timing signal sent by the rotation speed module 2, when the countdown T1 returns to zero, the recording module 6 records the pressure P1 at the current water outlet and sends P1 and P0 to the comparison module 5, the comparison module 5 calculates the difference P between P1 and P0 and compares the difference P with a judgment threshold Pn, if the Delta P is smaller than the judgment threshold Pn, the comparison module 5 sends a stop signal to the control module 1, after the control module 1 receives the stop signal sent by the comparison module 5, the control module 1 sends a stop signal to the rotating speed module 2, and after the rotating speed module 2 receives the stop signal, the motor is controlled to stop.
In the working process of the water pump, when the rotating speed of the motor is reduced, the pressure provided by the water pump is reduced, and the total pressure is obviously reduced due to the pressure relief effect of the water outlet part, so that the water outlet part can be judged to be drained at the moment, the delta P is larger than a judgment threshold Pn, and when the delta P is not larger than the judgment threshold Pn, a user stops using water, so that the motor is controlled to stop, and the purpose of stopping the water pump is achieved. The shut down of water pump is judged not based on the shut down pressure value that the user set for in advance in this application promptly, and can directly judge out whether the water pump is using water according to the change of pressure, has solved the trouble that current scheme need set for shut down pressure value in advance, and the inlet pressure change makes the total pressure can not reach shut down pressure and the problem that the water pump that causes does not shut down.
When the delta P is larger than the judgment threshold Pn, the user uses water, the comparison module 5 sends a use signal to the control module 1, the control module 1 sends a recovery signal to the rotating speed module 2 after receiving the use signal sent by the comparison module 5, and the rotating speed module 2 controls the motor to recover to the highest rotating speed after receiving the recovery signal, so that the user can use water conveniently.
The period module 4 is used for recording the number M of times that the speed reduction module 2 receives the speed reduction signal, the comparison module 5 obtains the M recorded by the period module 4 and compares the M with the M, when the M is not less than 1, the comparison module 5 obtains the current motor speed, when the current motor speed is greater than a preset minimum speed Nmin and the Delta P is less than a judgment threshold Pn, the comparison module 5 sends a speed reduction signal to the control module 1, the control module 1 sends the speed reduction signal to the speed reduction module 2 after receiving the speed reduction signal sent by the comparison module 5, when the current motor speed is less than the minimum speed Nmin and the Delta P is less than the judgment threshold Pn, the comparison module 5 sends a stop signal to the control module 1, and after receiving the stop signal sent by the comparison module 5, the control module 1 sends a stop signal to the speed module 2.
In the using process, after the rotating speed module 2 receives the recovery signal, when the motor is controlled to recover to the highest rotating speed, the zero returning signal is sent to the period module 4, so that M is returned to zero.
When the Δ P is not greater than the judgment threshold Pn, in order to reduce an error, the comparison module 5 sends a sampling signal to the sampling module 7, after the sampling module 7 receives the sampling signal, the sampling module 7 sends a timing signal to the timing module 3, after the timing module 3 receives the timing signal sent by the sampling module 7, countdown with a duration of T2 is performed, in the process of resetting to zero by the countdown T2, the sampling module 7 obtains the current water pressure P1 detected by the pressure module 8 for multiple times and transmits the current water pressure P1 to the comparison module 5, the comparison module 5 calculates a difference Δ P between P1 and P0 after receiving the P1 transmitted by the sampling module 7, if the Δ P is not greater than Pn, the comparison module 5 sends a stop signal to the control module 1, and after the control module 1 receives the stop signal sent by the comparison module 5, the control module 1 sends a stop signal to the rotation speed module 2. During the time when T2 returns to zero, when Δ P is smaller than Pn, the comparison module 5 does not send the sampling signal to the sampling module 7.
The application also discloses a water pump control method, water pressure P at the water outlet is obtained, the water pressure P is compared with a lowest value Pmin, if the water pressure P is not less than the lowest value Pmin, countdown with the time length of T is carried out, when the time length of T is zero, if the fluctuation of P is less than Pu, in the countdown with the time length of T, the pressure Pc at the water outlet is obtained for many times, the difference value of a plurality of pressure values Pc and P is calculated, and when the difference value of the Pc and P is less than Pu, the fluctuation of P is less than Pu. Recording a pressure value P0 at the moment, controlling the rotation speed of the motor to be reduced from N0 to N1, then carrying out countdown with the time length of T1, recording the pressure P1 at the current water outlet when the countdown T1 returns to zero, calculating the difference value delta P between P1 and P0, and controlling the motor to stop if the delta P is less than a judgment threshold Pn. And if the delta P is larger than the judgment threshold Pn, controlling the motor to recover to the highest rotating speed.
Recording the number M of times of reduction of the rotating speed of the motor, controlling the motor to reduce the speed n on the basis of the current rotating speed when the M is not less than 1 and the current rotating speed of the motor is greater than the minimum rotating speed Nmin and the Delta P is less than a judgment threshold Pn, and controlling the motor to stop when the current rotating speed of the motor is less than the minimum rotating speed Nmin and the Delta P is less than the judgment threshold Pn. In the present application, n may be a fixed value a, or may be a value after the fixed value a × M. And when the delta P is not greater than the judgment threshold Pn, performing countdown with the time length of T2, acquiring the current water pressure P1 for many times and calculating the difference delta P between P1 and P0 in the process of resetting to zero by the countdown T2, and if the delta P is not greater than the Pn, controlling the motor to stop.
The present application also discloses a storage medium including a stored program, wherein the program executes the above-described control method.
The application also discloses a processor, which is used for running the program, wherein the program executes the control method when running.
The implementation principle of the embodiment is as follows: in the working process of the water pump, when the rotating speed of the motor is reduced, the pressure provided by the water pump is reduced, the total pressure can be obviously reduced due to the pressure relief effect of the water outlet part, so that the water outlet of the water outlet part at the moment can be judged, at the moment, the Delta P is larger than a judgment threshold Pn, after the rotating speed of the water pump is reduced, the pressure provided by the water pump is reduced, but the water in the cavity cannot leak due to the one-way valve at the water inlet, when the water outlet part does not discharge water, the total pressure before the rotating speed is reduced is basically maintained, so that the situation that the user does not use water at the moment can be judged, namely the Delta P is smaller than the judgment threshold Pn, the user stops using water is indicated, and therefore, the motor is controlled to stop so as to achieve the purpose of stopping the water pump.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A water pump control system characterized by: the water pressure measuring device comprises a control module (1), a pressure module (8), a rotating speed module (2), a timing module (3), a recording module (6) and a comparison module (5), wherein the pressure module (8) is used for detecting the water pressure P at a water outlet and sending the water pressure P to the comparison module (5) for comparison, when the P is larger than a minimum value Pmin, a timing signal is sent to the timing module (3), the timing module (3) counts down the time length T after receiving the timing signal sent by the comparison module (5), when the T is zero, if the fluctuation of the P is smaller than Pu, the recording module (6) records the pressure value P0 at the moment and sends a control signal to the control module (1), the control module (1) sends a deceleration signal to the rotating speed module (2) after receiving the control signal, the rotating speed of a control motor is reduced to N1 from the current rotating speed N0 after receiving the deceleration signal by the rotating speed module (2), and sending a timing signal to the timing module 3, counting down for a time length of T1, when the counting down T1 returns to zero, the recording module (6) records the pressure P1 at the current water outlet, the comparison module (5) calculates the difference value delta P between P1 and P0, if the delta P is smaller than the judgment threshold Pn, the control module (1) sends a stop signal to the rotating speed module (2), and the rotating speed module (2) controls the motor to stop after receiving the stop signal.
2. A water pump control system as claimed in claim 1, wherein: if the delta P is larger than the judgment threshold Pn, the control module (1) sends a recovery signal to the rotating speed module (2), and the rotating speed module (2) controls the motor to recover to the highest rotating speed after receiving the recovery signal.
3. A water pump control system as claimed in claim 1, wherein: the motor speed reduction control device is characterized by further comprising a period module (4), wherein the period module (4) is used for recording the number M of times that the speed reduction module (2) receives speed reduction signals, when the M is not less than 1, the current rotating speed of the motor is greater than the lowest rotating speed Nmin, the Delta P is less than a judgment threshold Pn, the control module (1) sends the speed reduction signals to the speed reduction module (2), and when the current rotating speed of the motor is less than the lowest rotating speed Nmin, the Delta P is less than the judgment threshold Pn, the control module (1) sends stop signals to the speed reduction module (2).
4. A water pump control system as claimed in claim 1, wherein: the water pressure control device is characterized by further comprising a sampling module (7), when the delta P is not greater than a judgment threshold Pn, the sampling module (7) sends a timing signal to a timing module (3), the timing module (3) performs countdown with the time length of T2 after receiving the timing signal sent by the sampling module (7), the sampling module (7) obtains the current water pressure P1 detected by the pressure module (8) for many times and transmits the current water pressure P1 to a comparison module (5) in the process of enabling the countdown T2 to return to zero, the comparison module (5) calculates the difference delta P between P1 and P0 after receiving the P1 transmitted by the sampling module (7), and if the delta P is not greater than the Pn, the control module (1) sends a stop signal to the rotating speed module (2).
5. A water pump control method is characterized in that: acquiring water pressure P at a water outlet, comparing the water pressure P with a lowest value Pmin, counting down for a time length T if the water pressure P is not less than the lowest value Pmin, when the time length T returns to zero, recording a pressure value P0 at the time if the fluctuation of the water pressure P is less than Pu, controlling the rotating speed of the motor to be reduced from a current rotating speed N0 to N1, then counting down for a time length T1, when the counting down T1 returns to zero, recording a current pressure P1 at the water outlet, calculating a difference value delta P between the P1 and the P0, and controlling the motor to stop if the delta P is less than a judgment threshold value Pn.
6. The water pump control method according to claim 5, characterized in that: and if the delta P is larger than the judgment threshold Pn, controlling the motor to recover to the highest rotating speed.
7. The water pump control method according to claim 5, characterized in that: recording the number M of times of reduction of the rotating speed of the motor, controlling the motor to reduce the speed n on the basis of the current rotating speed when the M is not less than 1 and the current rotating speed of the motor is greater than the minimum rotating speed Nmin and the Delta P is less than a judgment threshold Pn, and controlling the motor to stop when the current rotating speed of the motor is less than the minimum rotating speed Nmin and the Delta P is less than the judgment threshold Pn.
8. The water pump control method according to claim 5, characterized in that: and when the delta P is not greater than the judgment threshold Pn, performing countdown with the time length of T2, acquiring the current water pressure P1 for many times and calculating the difference delta P between P1 and P0 in the process of resetting to zero by the countdown T2, and if the delta P is not greater than the Pn, controlling the motor to stop.
9. A storage medium characterized by comprising a stored program, wherein the program executes the control method of any one of claims 5 to 8.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the control method according to any one of claims 5 to 8 when running.
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| CN117759530A (en) * | 2023-12-29 | 2024-03-26 | 江苏新克医疗器械有限公司 | Quality control system of air pressure pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117759530A (en) * | 2023-12-29 | 2024-03-26 | 江苏新克医疗器械有限公司 | Quality control system of air pressure pump |
| CN117759530B (en) * | 2023-12-29 | 2024-05-24 | 江苏新克医疗器械有限公司 | Quality control system of air pressure pump |
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| CN114893386B (en) | 2024-06-25 |
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