Variable-frequency cleaning method of cleaning equipment

Abstract

The invention relates to the technical field of cleaning equipment, in particular to a variable-frequency cleaning method of the cleaning equipment, the cleaning equipment comprises a cleaning cabin, in the spraying cleaning process, the pressure of an inner chamber of the cleaning cabin is adjusted, and adjustment of the rotating speed of a spraying arm is completed; the inner chamber pressure of the cleaning cabin body is reduced, and the rotating speed of the spraying arm is slowed down; pressure in the inner chamber of the cleaning cabin is increased, and the rotating speed of the spraying arm is increased. Multi-frequency speed regulation of the spraying arm can be achieved by controlling the pressure of the inner chamber of the cleaning equipment, and the variable-frequency cleaning requirements of different instruments are effectively met.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and particularly to a variable-frequency cleaning method for a cleaning equipment. Background Art

[0002] Generally, a cleaning equipment drives a spray arm to rotate by a circulation pump to achieve the cleaning of instruments in the chamber. However, the structural differences of different instruments are relatively large: for example, basic surgical instruments can be cleaned with relatively large force, and the cleaning is qualified without damaging the instruments; while for fiber instruments such as ophthalmic instruments, if the cleaning force is relatively large, it may cause deformation of the instruments. Therefore, different spray cleaning forces, that is, different rotational speeds of the spray arm, need to be used for different instruments.

[0003] At present, the cleaning equipment mainly uses a frequency converter to adjust the rotational speed of the circulation pump to achieve variable-frequency cleaning, which has certain limitations: one is that the rotational speed is limited, and a single device can only be switched according to a fixed adjustable rotational speed and cannot be freely adjusted; the other is that the failure rate and cost of the equipment will be correspondingly affected after adding a frequency converter.

[0004] CN 114099835 A provides a biliary pulsed variable-frequency flusher, including a first tube body, a change-over switch, a pulsed pump and a handle; the first tube body includes an operation end and a connection end; the change-over switch is connected to the connection end, and the change-over switch includes a first gear position and a second gear position; the pulsed pump is connected to the change-over switch; the change-over switch and the pulsed pump are arranged on the handle; wherein, when the change-over switch is in the first gear position, the pulsed pump is connected to the connection end through the change-over switch; when the change-over switch is in the second gear position, the connection end can be communicated with a negative pressure air source through the change-over switch. This technical solution introduces a method for adjusting the suction force of the pulsed pump by opening a valve, and the adjustment method is relatively single and requires an additional control valve, and the multi-frequency cleaning of the spray arm cannot be achieved. Summary of the Invention

[0005] Aiming at the technical problems that the existing cleaning equipment can only adjust the rotational speed according to fixed gears and the failure rate and cost of the equipment increase after adding a frequency converter, the present invention provides a variable-frequency cleaning method for a cleaning equipment, which can realize the multi-frequency speed regulation of the spray arm by controlling the pressure in the inner chamber of the cleaning equipment, and effectively solves the variable-frequency cleaning requirements of different instruments.

[0006] The technical solution of the present invention is as follows: A variable-frequency cleaning method for a cleaning equipment, the cleaning equipment includes a cleaning chamber body, and during the spray cleaning process, the pressure in the inner chamber of the cleaning chamber body is adjusted to complete the adjustment of the rotational speed of the spray arm.

[0007] It should be further noted that when the pressure in the inner chamber of the cleaning chamber body decreases, the rotational speed of the spray arm slows down; The pressure in the inner chamber of the cleaning tank increases, and the rotation speed of the spray arm becomes faster.

[0008] It should be further noted that the inner chamber of the cleaning tank is adjusted to different pressure values, the corresponding rotation speeds of the spray arm are recorded respectively, the fitting curve of the pressure in the inner chamber of the cleaning tank and the rotation speed of the spray arm is drawn, the pressure in the inner chamber corresponding to the target rotation speed of the spray arm is determined according to the fitting curve, and the pressure in the inner chamber is adjusted.

[0009] It should be further noted that a load rack is installed in the inner chamber of the cleaning tank, a spray arm is arranged in cooperation with the load rack, a water outlet is arranged at the bottom of the inner chamber of the cleaning tank, the water outlet is communicated with the water inlet of the spray arm through a circulating spray pipeline, and a circulating pump is arranged on the circulating spray pipeline; A pressure reducing pipeline is arranged on the cleaning tank, one end of the pressure reducing pipeline is communicated with the inner chamber of the cleaning tank, and a vacuum pump is installed on the pressure reducing pipeline; A gas phase return pipeline is arranged on the cleaning tank, one end of the gas phase return pipeline is communicated with the inner chamber of the cleaning tank, the other end of the gas phase return pipeline is communicated with an external gas source, and a gas phase return valve is arranged on the gas phase return pipeline; A pressure sensor is installed on the cleaning tank for real-time monitoring of the pressure in the inner chamber of the cleaning tank.

[0010] It should be further noted that a temperature sensor is also installed on the cleaning tank for real-time monitoring of the temperature in the inner chamber of the cleaning tank.

[0011] It should be further noted that the vacuum pump is a water ring vacuum pump, the vacuum pump is communicated with an external water source through a water inlet pipeline, a solenoid valve is arranged on the water inlet pipeline, and the vacuum pump is communicated with a reserved drainage pipeline through a water outlet pipeline.

[0012] It should be further noted that the water outlet at the bottom of the inner chamber of the cleaning tank is communicated with the reserved drainage pipeline through a drainage valve.

[0013] It should be further noted that the cleaning equipment further includes a liquid phase return pipeline, a liquid phase return valve is arranged on the liquid phase return pipeline, one end of the liquid phase return pipeline is T-shaped communicated with the gas phase return pipeline, and the other end of the liquid phase return pipeline is communicated with a bubble generator, and the bubble generator is arranged at the bottom of the inner chamber of the cleaning tank.

[0014] It should be further noted that the pressure in the inner chamber of the cleaning tank is adjusted by using the vacuum pump and / or the gas phase return valve. When it is necessary to reduce the pressure in the inner chamber of the cleaning tank, the vacuum pump is started. When it is necessary to increase the pressure in the inner chamber of the cleaning tank, the gas phase return valve is opened.

[0015] It should be further noted that the rotation speed of the spray arm is tested by a spray arm rotation speed detection unit. The spray arm rotation speed detection unit includes magnets, which are installed at both ends of the spray arm. Proximity switches that cooperate with the magnets are provided on the outer wall of the cleaning chamber body. The proximity switches are electrically connected to the controller, and the controller is electrically connected to the display. The working principle of the spray arm rotation speed detection unit is as follows: when the magnet at one end of the spray arm rotates to a position directly opposite the proximity switch, the proximity switch sends a signal to the controller once. When the spray arm rotates one circle, the proximity switch sends two signals to the controller. Within a certain period of time, the controller calculates the rotation speed of the spray arm according to the number of received signals and a preset program, and transmits the calculated speed data to the display for display.

[0016] The beneficial effects of the present invention are as follows: The variable-frequency cleaning method of the cleaning equipment provided by the present invention can adjust the rotation speed of the spray arm in the inner chamber of the cleaning chamber, realizing the variable-frequency cleaning of the cleaning equipment. During the cleaning operation, for different types and different precision levels of instruments, the rotation speed of the spray arm can be flexibly adjusted according to actual needs. For precision instruments, a lower rotation speed is used for gentle cleaning to avoid damage to the instruments caused by the impact of high-speed water flow, ensuring that the integrity and performance of the instruments are not affected; for basic instruments, the rotation speed can be increased to enhance the cleaning strength, effectively removing stubborn stains and improving the cleaning efficiency and quality. This personalized cleaning method can not only expand the application scenarios of the cleaning equipment, significantly improve the cleaning effect, but also extend the service life of the instruments, reduce the cleaning cost, and has a wide application prospect in fields such as medical treatment and electronics that have high requirements for the cleanliness and integrity of instruments. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the cleaning equipment in Embodiment 2 of the specific implementation manner of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the spray arm rotation speed detection unit of the cleaning equipment in Embodiment 2 of the specific implementation manner of the present invention.

[0020] Figure 3 It is an enlarged schematic diagram of the connection structure between the spray arm and the magnet of the cleaning equipment in Embodiment 2 of the specific implementation manner of the present invention.

[0021] Figure 4 It is a quadratic fitting diagram of the inner chamber pressure and the spray arm rotation speed of the cleaning equipment in Embodiment 2 of the specific implementation manner of the present invention.

[0022] Figure 5 It is the rotational speed change diagram of Embodiment 3 in the specific implementation manner of the present invention.

[0023] Figure 6 It is the rotational speed change diagram of the prior art controlled by a frequency converter.

[0024] In the figure, 1 - load rack, 2 - spray arm, 3 - circulating spray pipeline, 4 - circulating pump, 5 - high-temperature resistant magnet, 6 - proximity switch, 7 - controller, 8 - display, 9 - temperature sensor, 10 - pressure-reducing pipeline, 11 - vacuum pump, 12 - solenoid valve, 13 - drain valve, 14 - gas-phase return valve, 15 - liquid-phase return valve, 16 - bubble generator, 17 - pressure sensor. Specific implementation manner

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0026] A frequency conversion cleaning method for a cleaning device, that is, a method for controlling / regulating the rotational speed of the spray arm of a cleaning device. The cleaning device includes a cleaning chamber body. During the spray cleaning process, the pressure in the inner chamber of the cleaning chamber is adjusted to complete the adjustment of the rotational speed of the spray arm.

[0027] The above frequency conversion cleaning method is applicable to cleaning devices with a vacuum pumping function and a spray cleaning function, such as the multi-cleaning mode cleaning and disinfection device described in CN212349676 U.

[0028] As a preferred implementation manner of the present invention, within the range of the pressure in the inner chamber of the cleaning chamber from -10 kPa to -85 kPa, when the pressure in the inner chamber of the cleaning chamber decreases, the rotational speed of the spray arm slows down; when the pressure in the inner chamber of the cleaning chamber increases, the rotational speed of the spray arm speeds up.

[0029] As a preferred implementation manner of the present invention, the inner chamber of the cleaning chamber is adjusted to different pressure values, the corresponding rotational speeds of the spray arm are recorded respectively, a fitting curve of the pressure in the inner chamber of the cleaning chamber and the rotational speed of the spray arm is drawn, the pressure in the inner chamber corresponding to the target rotational speed of the spray arm is determined according to the fitting curve, and the pressure in the inner chamber is adjusted. This method makes the pressure adjustment more scientific, accurate, and fast, can effectively avoid the errors caused by manual experience judgment, ensure that each cleaning operation can be carried out at the designed rotational speed, and improve the consistency and reliability of the cleaning effect.

[0030] As a preferred embodiment of the present invention, the pressure in the cleaning chamber is taken as an independent variable and the speed of the spray arm is taken as a dependent variable. The experimental data is fitted with a polynomial function and / or a piecewise function to obtain a fitting curve of the pressure in the cleaning chamber and the speed of the spray arm. Furthermore, the polynomial function can be a linear function, a quadratic function and / or a cubic function.

[0031] As a preferred embodiment of the present invention, polynomial functions (linear function, quadratic function, cubic function) and piecewise functions are respectively used to fit the experimental data, and the fitting coefficients R of various functions are calculated. 2 Evaluate the fitting efficiency. Specifically, select the fitting coefficient R 2 The fitting curve closest to 1 is used as the basis for regulating the pressure in the cleaning cabin.

[0032] As a preferred implementation of the present invention, data fitting is performed using software such as Data Analysis, Excel, Matlab or Origin.

[0033] As a preferred embodiment of the present invention, the adjustment range of the inner chamber pressure of the cleaning cabin is -90 kPa~10 kPa. Specifically, the inner chamber pressure value of the cleaning cabin can be selected from -90 kPa, -85 kPa, -80 kPa, -75 kPa, -70 kPa, -65 kPa, -60 kPa, -55 kPa, -50 kPa, -45 kPa, -40 kPa, -35 kPa, -30 kPa, -25 kPa, -20 kPa, -15 kPa, -10 kPa, -5 kPa, 0 kPa, 5 kPa, 10 kPa and other specific values.

[0034] As a more preferred embodiment of the present invention, the inner chamber pressure of the cleaning cabin is adjusted to -85 kPa, -80 kPa, -70 kPa, -60 kPa, -50 kPa, -40 kPa, -30 kPa, -20 kPa, -10 kPa and 0 kPa in sequence, and the corresponding spray arm speeds are recorded respectively, and a fitting curve of the inner chamber pressure of the cleaning cabin and the spray arm speed is drawn.

[0035] As a preferred embodiment of the present invention, due to certain differences in the structural parameters of cleaning equipment, different types of cleaning equipment have different fitting curves, and experiments need to be conducted separately to obtain fitting curves of the cleaning cabin inner chamber pressure and the spray arm rotation speed.

[0036] As a preferred embodiment of the present invention, the above-mentioned variable frequency cleaning method can be implemented on a cleaning device having the following structure: Inside the cleaning chamber, a load rack is installed. A spray arm is arranged in a matching manner on the load rack. At the bottom of the inner chamber of the cleaning chamber, there is a water outlet, which is connected to the water inlet of the spray arm through a circulating spray pipeline. A circulating pump is arranged on the circulating spray pipeline. Structures such as the spray arm, the circulating spray pipeline, and the circulating pump cooperate with each other to form the spray cleaning unit of the cleaning equipment, enabling the cleaning equipment to have the function of spray cleaning. During the process of circulating heating, water continuously sprays and cleans the medical devices placed on the load rack in the inner chamber of the cleaning chamber at the same time.

[0037] As a preferred embodiment of the present invention, a pressure reduction pipeline is arranged on the cleaning chamber. One end of the pressure reduction pipeline is connected to the inner chamber of the cleaning chamber, and a vacuum pump is installed on the pressure reduction pipeline.

[0038] As a preferred embodiment of the present invention, a gas-phase return pipeline is arranged on the cleaning chamber. One end of the gas-phase return pipeline is connected to the inner chamber of the cleaning chamber, and the other end of the gas-phase return pipeline is connected to an external gas source. A gas-phase return valve is arranged on the gas-phase return pipeline.

[0039] As a preferred embodiment of the present invention, a pressure sensor is installed on the cleaning chamber for real-time monitoring of the pressure in the inner chamber of the cleaning chamber. The pressure sensor can timely and accurately feedback the change of the inner chamber pressure, providing accurate data support for the adjustment of the rotation speed of the spray arm.

[0040] As a preferred embodiment of the present invention, the load rack is a single-layer structure or a multi-layer structure, for example, a load rack with three layers of high, medium, and low.

[0041] As a preferred embodiment of the present invention, the pressure in the inner chamber of the cleaning chamber is adjusted by using the vacuum pump and / or the gas-phase return valve. When it is necessary to reduce the pressure in the inner chamber of the cleaning chamber, the vacuum pump is started. When it is necessary to increase the pressure in the inner chamber of the cleaning chamber, the gas-phase return valve is opened.

[0042] As a preferred embodiment of the present invention, a temperature sensor is also installed on the cleaning chamber for real-time monitoring of the temperature in the inner chamber of the cleaning chamber. Temperature has an important influence on the cleaning effect. Different cleaning liquids have different cleaning performances at different temperatures. By real-time monitoring of the inner chamber temperature, the temperature of the cleaning liquid can be adjusted according to the actual situation to improve the cleaning effect. At the same time, the temperature sensor can also timely detect possible temperature abnormalities during the cleaning process, avoiding damage to the instruments caused by too high or too low temperature.

[0043] As a preferred embodiment of the present invention, the vacuum pump is a water-ring vacuum pump. The vacuum pump is connected to an external water source through a water inlet pipeline, and an electromagnetic valve is arranged on the water inlet pipeline. The vacuum pump is connected to a reserved drainage pipeline through a water outlet pipeline. The external water source can be tap water, which is used to cool the vacuum pump to ensure the vacuum pumping efficiency of the vacuum pump.

[0044] As a preferred embodiment of the present invention, the water outlet at the bottom of the inner chamber of the cleaning chamber is communicated with the reserved drainage pipeline through a drainage valve, and the waste water in the cleaning chamber is discharged in time after the cleaning is completed, so as to avoid the corrosion of the cleaning chamber and the instruments caused by the residual waste water.

[0045] As a preferred embodiment of the present invention, the cleaning device further includes a liquid-phase return pipeline, on which a liquid-phase return valve is provided. One end of the liquid-phase return pipeline is T-shaped connected to the gas-phase return pipeline, and the other end of the liquid-phase return pipeline is communicated with a bubble generator, which is arranged at the bottom of the inner chamber of the cleaning chamber. Structures such as the pressure reduction pipeline, the vacuum pump, the pressure sensor, the gas-phase return pipeline, the gas-phase return valve, the liquid-phase return pipeline, the liquid-phase return valve, and the bubble generator cooperate with each other to form the pulsating vacuum cleaning unit of the cleaning device, enabling the cleaning device to have a pulsating cleaning function. Under the condition of vacuum boiling, the inner and outer surfaces of the instruments are cleaned by using the principles of gas-phase pulsation and liquid-phase pulsation, and the instruments are thoroughly cleaned after multiple reciprocations.

[0046] As a preferred embodiment of the present invention, the above-mentioned pressure sensor, temperature sensor, valves on each pipeline, as well as the vacuum pump and the circulation pump are respectively electrically connected to the controller.

[0047] As a preferred embodiment of the present invention, magnets are respectively installed at both ends of the spray arm. A proximity switch is provided on the outer wall of the cleaning chamber to cooperate with it. The proximity switch is electrically connected to the controller, and the controller is electrically connected to the display. The working principle of the spray arm rotation speed detection unit is as follows: when the magnet at one end of the spray arm rotates to a position directly opposite to the proximity switch, the proximity switch will send a signal to the controller once. Since the spray arm rotates one circle, the magnets at both ends can each make the proximity switch send a signal once, so when the spray arm rotates one circle, the proximity switch will send two signals to the controller in total. Within a specific time, the controller calculates the rotation speed of the spray arm based on the number of signals received and transmits the calculated rotation speed data to the display for display. The rotation speed detection data is an important reference for the operation state of the cleaning device. The operator can timely understand whether the variable-frequency cleaning scheme is carried out according to the set process based on the displayed rotation speed data. At the same time, the detection data of the spray arm rotation speed detection unit can also provide a basis for the maintenance and fault diagnosis of the cleaning device.

[0048] As a preferred embodiment of the present invention, the magnets are made of high-temperature resistant magnets, effectively avoiding the problem of weakening or even disappearing of the magnetic force caused by too high environmental temperature and ensuring magnetic stability.

[0049] As a preferred embodiment of the present invention, the magnets are fixedly connected to both ends of the spray arm through a mold. The connection between the magnet and the spray arm is filled by mold extrusion. Due to the influence of the inertial force when the spray arm rotates, the magnets pressed into both ends of the spray arm become tighter and tighter.

[0050] As a preferred embodiment of the present invention, the proximity switch is threadedly connected to the outer wall of the cleaning tank.

[0051] As a preferred embodiment of the present invention, the proximity switch can be a proximity switch of the HGSL8-ZK / C50 model.

[0052] Example 1 A variable-frequency cleaning method for a cleaning device. The cleaning device includes a cleaning chamber. A load rack is installed in the inner chamber of the cleaning chamber. A spray arm is arranged in cooperation with the load rack. An outlet is provided at the bottom of the inner chamber of the cleaning chamber. The outlet is communicated with the water inlet of the spray arm through a circulating spray pipeline. A circulating pump is arranged on the circulating spray pipeline; A pressure-reducing pipeline is arranged on the cleaning chamber. One end of the pressure-reducing pipeline is communicated with the inner chamber of the cleaning chamber. A vacuum pump is installed on the pressure-reducing pipeline; A gas-phase return pipeline is arranged on the cleaning chamber. One end of the gas-phase return pipeline is communicated with the inner chamber of the cleaning chamber. The other end of the gas-phase return pipeline is communicated with an external gas source. A gas-phase return valve is arranged on the gas-phase return pipeline; A pressure sensor is installed on the cleaning chamber for real-time monitoring of the pressure in the inner chamber of the cleaning chamber; During the normal spray cleaning process of the spray arm, the pressure in the inner chamber of the cleaning chamber is adjusted by using the vacuum pump and / or the gas-phase return valve. When it is necessary to slow down the rotation speed of the spray arm, a pressure-reducing operation is performed on the inner chamber of the cleaning chamber, and the vacuum pump is started to extract the gas in the inner chamber of the cleaning chamber to achieve the deceleration of the rotation of the spray arm; when it is necessary to accelerate the rotation speed of the spray arm, a pressure-increasing operation is performed on the inner chamber of the cleaning chamber, and the gas-phase return valve is opened to fill the inner chamber of the cleaning chamber with gas, thereby completing the acceleration of the rotation of the spray arm.

[0053] Example 2 As Figures 1 to 3 shown, a cleaning device includes a cleaning chamber. A load rack 1 is installed in the inner chamber of the cleaning chamber. The load rack 1 has a three-layer structure of high, medium and low; The cleaning device further includes a spray cleaning unit. The spray cleaning unit includes a spray arm 2. The spray arm 2 is correspondingly arranged on each layer of the load rack 1 for spray cleaning the instruments to be cleaned placed on the load rack 1. An outlet is provided at the bottom of the inner chamber of the cleaning chamber. The outlet is communicated with the water inlet of the spray arm 2 through a circulating spray pipeline 3. A circulating pump 4 is arranged on the circulating spray pipeline 3; Both ends of the spray arm 2 are respectively fixedly connected with high-temperature-resistant magnets 5 through molds. A proximity switch 6 that cooperates with the high-temperature-resistant magnets 5 is threadedly connected to the outer wall of the cleaning chamber. The model of the proximity switch 6 is HGSL8-ZK / C50. The proximity switch 6 is electrically connected to a controller 7, and the controller 7 is also electrically connected to a display 8; A temperature sensor 9 is installed on the cleaning chamber to monitor the temperature of the inner chamber of the cleaning chamber in real time; The cleaning device further includes a pulsating vacuum cleaning unit. The pulsating vacuum cleaning unit includes a pressure reduction pipeline 10. One end of the pressure reduction pipeline 10 is connected to the inner chamber of the cleaning chamber, and a vacuum pump 11 is installed on the pressure reduction pipeline 10; The vacuum pump 11 is a water ring vacuum pump. The vacuum pump 11 is connected to an external water source through a water inlet pipeline, and a solenoid valve 12 is arranged on the water inlet pipeline. The vacuum pump 11 is connected to a reserved drainage pipeline through a water outlet pipeline; The water outlet at the bottom of the inner chamber of the cleaning chamber is connected to the reserved drainage pipeline through a drainage valve 13; A gas-phase return pipeline is arranged on the cleaning chamber. One end of the gas-phase return pipeline is connected to the inner chamber of the cleaning chamber, and the other end of the gas-phase return pipeline is connected to an external gas source. A gas-phase return valve 14 is arranged on the gas-phase return pipeline; A liquid-phase return pipeline is arranged on the cleaning chamber. A liquid-phase return valve 15 is arranged on the liquid-phase return pipeline. One end of the liquid-phase return pipeline is connected to the gas-phase return pipeline in a T-shaped manner, and the other end of the liquid-phase return pipeline is connected to a bubble generator 16. The bubble generator 16 is arranged at the bottom of the inner chamber of the cleaning chamber; A pressure sensor 17 is installed on the cleaning chamber to monitor the pressure of the inner chamber of the cleaning chamber in real time; Except for the structures specifically mentioned, the pressure sensor 17, the temperature sensor 9, the valves on each pipeline, and the vacuum pump 11 and the circulation pump 4 are also electrically connected to the controller 7 (not shown in the figure).

[0054] Under normal conditions, for the above cleaning device, when the spray cleaning unit works alone, the spray cleaning mode is completed; when the pulsating vacuum cleaning unit works alone, the pulsating cleaning mode is completed.

[0055] Particularly, when the spray cleaning unit works alone, since the parameters of all unit components are constant, the rotation speed of the spray arm is constant. During the cleaning process of medical devices, this constant rotation speed can generally complete the cleaning of conventional basic instruments. However, for delicate instruments with slender structures, this fixed rotation speed may cause damage and deformation of the instruments. To solve this problem, a variable-frequency cleaning method is proposed. According to the adjustment requirement of the spray arm rotation speed, the pressure in the inner chamber of the cleaning chamber is increased or decreased, so as to realize the regulation of the spray arm rotation speed without changing the parameters of the unit components.

[0056] Specifically, when it is necessary to slow down the rotation speed of the spray arm, the pressure in the inner chamber of the cleaning chamber is reduced, the vacuum pump is started, and the gas in the inner chamber of the cleaning chamber is pumped out to realize the deceleration of the rotation of the spray arm; when it is necessary to accelerate the rotation speed of the spray arm, the pressure in the inner chamber of the cleaning chamber is increased, the gas-phase return valve is opened, and gas is filled into the inner chamber of the cleaning chamber to complete the acceleration of the rotation of the spray arm.

[0057] In order to obtain a more precise regulation effect of the spray arm rotation speed and better meet the cleaning requirements of different instruments, the rotation speed can be adjusted according to the following optimization method: S1. Operate the spray cleaning unit, and then use a vacuum pump and / or a gas-phase return valve to adjust the inner chamber of the cleaning chamber to different pressure values. The rotation speed of the spray arm changes. Record the rotation speed of the spray arm, and a total of 10 groups of data are obtained. The specific data are shown in Table 1 below; Table 1 Pressure values in the inner chamber of the cleaning chamber and corresponding spray arm rotation speed data

[0058] S2. Use the pressure values in different inner chambers of the cleaning chamber and the spray arm rotation speed data under different pressure values in the inner chamber of the cleaning chamber to draw a broken line of the spray arm rotation speed changing with the pressure in the inner chamber of the cleaning chamber (i.e., the original data curve, as shown by the blue line in Figure 4 ); S3. Use data fitting software (such as Data Analysis, Excel, matlab or Origin, etc.) to fit the original data curve drawn in S2, try the fitting results of different functions (such as linear function, quadratic function, cubic function, piecewise function, etc.), and compare the fitting coefficients R 2 of various functions, and select the fitting curve with R 2 closest to 1 as the basis for regulating the pressure in the inner chamber of the cleaning chamber. In this embodiment, the original data curve in step S2 is fitted with a quadratic function as an example, and the obtained fitting curve is as shown by the orange line in Figure 4 . It can be seen that the fitting degree between the two is relatively high. The fitting equation is as follows: v =-0.0048 p 2 -0.01687 p +44.3888, wherein, v represents the rotation speed of the spray arm, with the unit of r / min, p represents the pressure in the inner chamber of the cleaning chamber, with the unit of kPa; S4. According to the designed cleaning scheme, calculate the pressure in the inner chamber of the cleaning chamber corresponding to the rotation speed of the template spray arm according to the fitting equation, and change the pressure in the inner chamber of the cleaning chamber at different time periods to adjust the rotation speed of the spray arm, so as to realize the variable-frequency cleaning of the cleaning equipment.

[0059] Example 3 Figure 5 Illustrates a variable-frequency cleaning scheme that can be implemented by the cleaning equipment in Example 2, that is, the expected rotation speed change scheme of the spray arm in different stages. First, in the first stage, the rotation speed of the spray arm isv 0 v 0 is the rotation speed when the spray cleaning unit is working normally and the internal chamber pressure of the cleaning chamber is 0 kPa. Then, in the second stage, the rotation speed of the spray arm is v 3 v 3 is less than v 0. Then, in the third stage, the rotation speed of the spray arm is v 1 v 1 is greater than v 3 and less than v 0. After that, in the fourth stage, the rotation speed of the spray arm is v 2 v 2 is less than v 1. Finally, in the fifth stage, the rotation speed of the spray arm is v 4 v 4 is less than v 2.

[0060] Therefore, before the start of the second-stage cleaning after the end of the first-stage cleaning, it is necessary to adjust the rotation speed of the spray arm so that it decreases from v 0 to v 3. According to the method described in Embodiment 2, find a preferred fitting formula with the fitting coefficient R 2 closest to 1. Substitute the rotation speed v 3 into this preferred fitting formula, and calculate the internal chamber pressure value v 3 of the cleaning chamber corresponding to the rotation speed of the spray arm being p 3; Before the start of the third-stage cleaning after the end of the second-stage cleaning, it is necessary to adjust the rotation speed of the spray arm so that it increases from v 3 to v 1. Substitute the rotation speed v 1 into the above preferred fitting formula, and calculate the internal chamber pressure value v 1 of the cleaning chamber corresponding to the rotation speed of the spray arm being p 1; Before the start of the fourth-stage cleaning after the end of the third-stage cleaning, it is necessary to adjust the rotation speed of the spray arm so that it decreases from v 1 to v 2. Substitute the rotation speed v 2 into the above preferred fitting formula, and calculate the internal chamber pressure value v 2 of the cleaning chamber corresponding to the rotation speed of the spray arm being p 2; Before the start of the fifth-stage cleaning after the end of the fourth-stage cleaning, it is necessary to adjust the rotation speed of the spray arm so that it decreases from v 2 to v 4. Substitute the rotation speed v 4 into the above preferred fitting formula, and calculate the internal chamber pressure value vThe pressure value of the inner chamber of the cleaning tank corresponding to 4 p 4

[0061] Therefore, when the cleaning equipment implements the variable-frequency cleaning scheme as shown in Figure 5 The specific working process is as follows: (1) Start the cleaning equipment and enter the first-stage cleaning. At this time, the spray cleaning unit works normally, and the rotation speed of the spray arm is v 0 (2) After the first-stage cleaning is completed, according to the calculated rotation speed of the spray arm v The pressure of the inner chamber of the cleaning tank corresponding to 3 p 3, start the vacuum pump to reduce the pressure in the inner chamber of the cleaning tank. When the pressure sensor monitors that the inner chamber pressure reaches p 3, stop reducing the pressure. At this time, the spray arm sprays and cleans at a rotation speed of v 3, and start the second-stage cleaning. During the cleaning process, maintain the inner chamber pressure at p 3 until the second-stage cleaning is completed; (3) After the second-stage cleaning is completed, according to the calculated rotation speed of the spray arm v The pressure of the inner chamber of the cleaning tank corresponding to 1 p 1, close the vacuum pump, open the gas-phase return valve for return. When the pressure sensor monitors that the inner chamber pressure reaches p 1, stop the return. At this time, the spray arm sprays and cleans at a rotation speed of v 1, and start the third-stage cleaning. During the cleaning process, maintain the inner chamber pressure at p 1 until the third-stage cleaning is completed; (4) After the third-stage cleaning is completed, according to the calculated rotation speed of the spray arm v The pressure of the inner chamber of the cleaning tank corresponding to 2 p 2, start the vacuum pump to reduce the pressure in the inner chamber of the cleaning tank. When the pressure sensor monitors that the inner chamber pressure reaches p 2, stop reducing the pressure. At this time, the spray arm sprays and cleans at a rotation speed of v 2, and start the fourth-stage cleaning. During the cleaning process, maintain the inner chamber pressure at p 2 until the fourth-stage cleaning is completed; (5) After the fourth-stage cleaning is completed, according to the calculated rotation speed of the spray arm v The pressure of the inner chamber of the cleaning tank corresponding to 4 p 4, continue to reduce the pressure in the inner chamber of the cleaning tank through the vacuum pump. When the pressure sensor monitors that the inner chamber pressure reaches p 4, stop reducing the pressure. At this time, the spray arm sprays and cleans at a rotation speed of v 4, and start the fifth-stage cleaning. During the cleaning process, maintain the inner chamber pressure at p4, until the cleaning in the fifth stage is completed; (6) After the cleaning in the fifth stage is completed, open the gas-phase return valve for return, and at the same time start the drain valve to drain the inner chamber of the cleaning chamber, ending the variable-frequency cleaning process.

[0062] Comparative Example 1 Figure 6 shows a variable-frequency cleaning scheme that can be implemented by existing variable-frequency cleaning equipment. Under normal circumstances, the rotation speed of the spray arm is v 0. When variable-frequency cleaning is required, since existing variable-frequency cleaning equipment usually can only adjust the rotation speed of the spray arm in two gears, this cleaning equipment can only achieve the switching of the rotation speed of the spray arm between v 0 and v 1.

[0063] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention / Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A frequency conversion cleaning method for cleaning equipment, characterized in that: The cleaning equipment includes a cleaning cabin. During the spray cleaning process, the pressure in the cleaning cabin is adjusted to complete the adjustment of the rotation speed of the spray arm.

2. A variable frequency cleaning method for cleaning equipment according to claim 1, characterized in that: The pressure in the cleaning chamber decreases and the speed of the spray arm slows down; The pressure inside the cleaning chamber increases and the speed of the spray arm increases.

3. A variable frequency cleaning method for cleaning equipment according to claim 1, characterized in that: Adjust the inner chamber pressure of the cleaning cabin to different values, record the corresponding spray arm speeds, draw a fitting curve of the inner chamber pressure and the spray arm speed, determine the inner chamber pressure of the cleaning cabin corresponding to the target spray arm speed according to the fitting curve, and adjust the inner chamber pressure.

4. A variable frequency cleaning method for cleaning equipment according to any one of claims 1 to 3, characterized in that: A load rack is installed in the inner chamber of the cleaning cabin, and a spray arm is arranged on the load rack. A water outlet is arranged at the bottom of the inner chamber of the cleaning cabin, and the water outlet is connected to the water inlet of the spray arm through a circulating spray pipeline, and a circulating pump is arranged on the circulating spray pipeline; A pressure reducing pipeline is arranged on the cleaning cabin, one end of which is connected to the inner chamber of the cleaning cabin, and a vacuum pump is installed on the pressure reducing pipeline; A gas return pipeline is provided on the cleaning cabin, one end of which is connected to the inner chamber of the cleaning cabin, and the other end of which is connected to an external gas source. A gas return valve is provided on the gas return pipeline; A pressure sensor is installed on the cleaning cabin to monitor the pressure of the inner chamber of the cleaning cabin in real time.

5. A variable frequency cleaning method for cleaning equipment as claimed in claim 4, characterized in that: A temperature sensor is also installed on the cleaning cabin to monitor the temperature of the inner chamber of the cleaning cabin in real time.

6. A variable frequency cleaning method for cleaning equipment as claimed in claim 4, characterized in that: The vacuum pump is a water ring vacuum pump, which is connected to an external water source through a water inlet pipe, on which a solenoid valve is arranged, and the vacuum pump is connected to a reserved drainage pipe through a water outlet pipe.

7. A variable frequency cleaning method for cleaning equipment as claimed in claim 6, characterized in that: The water outlet at the bottom of the inner chamber of the cleaning cabin is communicated with the reserved drainage pipeline through a drainage valve.

8. A variable frequency cleaning method for cleaning equipment as claimed in claim 4, characterized in that: The cleaning equipment also includes a liquid return pipeline, which is provided with a liquid return valve. One end of the liquid return pipeline is T-connected with the gas return pipeline, and the other end of the liquid return pipeline is connected to a bubble generator, which is arranged at the bottom of the inner chamber of the cleaning cabin.

9. A variable frequency cleaning method for cleaning equipment as claimed in claim 4, characterized in that: The pressure inside the cleaning chamber is adjusted by a vacuum pump and / or a gas return valve. When the pressure inside the cleaning chamber needs to be reduced, the vacuum pump is started. When the pressure inside the cleaning chamber needs to be increased, the gas return valve is opened.

10. A variable frequency cleaning method for cleaning equipment as claimed in claim 4, characterized in that: The spray arm speed is tested by a spray arm speed detection unit. The spray arm speed detection unit includes a magnet installed at both ends of the spray arm. A proximity switch used in conjunction with the magnet is provided on the outer wall of the cleaning chamber. The proximity switch is electrically connected to the controller, and the controller is electrically connected to the display.

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