Ultrasonic cleaning apparatus, ultrasonic cleaning method, and use

Abstract

The present invention relates to an ultrasonic cleaning apparatus, an ultrasonic cleaning method and the use. The ultrasonic cleaning apparatus comprises a hanging tool, a multi-pass ultrasonic cleaning pool, a multi-arm trolley, a single-arm trolley, a dripping tool and a drip-dried piece pickup waiting area. The multi-pass ultrasonic cleaning pool comprises at least one purified water ultrasonic cleaning pool, at least one intermediate injection water ultrasonic cleaning pool, and at least two injection water ultrasonic cleaning pools which are located at the last pass and used alternately. Said two injection water ultrasonic cleaning pools which are located at the last pass and alternately used perform cleaning and drainage operation alternately; and injection water discharged from water outlets of the two alternately used injection water ultrasonic cleaning pools located at the last pass is used as supplementary water for a preceding-stage intermediate injection water ultrasonic cleaning pool. The present invention has the advantages of high cleaning efficiency, good cleaning effect, labor saving, capability of being provided with automatic disinfection, water saving, energy conservation and environmental protection, etc.

Description

Ultrasonic cleaning equipment, ultrasonic cleaning method and application Technical Field

[0001] The present invention relates to cleaning equipment and a cleaning method for medical devices, in particular to an ultrasonic cleaning equipment, an ultrasonic cleaning method and an application thereof. Background Art

[0002] Cardiac prosthetics are commonly used in cardiac surgery to repair atrial and ventricular septal defects. As implantable medical devices, these materials have very high cleanliness requirements. The cleaning process can affect their cleanliness.

[0003] Conventional cleaning methods, such as manual cleaning, offline cleaning, and ultrasonic cleaning, cannot effectively clean cardiac repair materials to the target cleanliness level in one go. These cleaning methods must be combined in different ways (e.g., multiple rinses followed by multiple ultrasonic cleanings) to achieve the desired cleaning effect. However, these cleaning processes have the following disadvantages:

[0004] 1. It is difficult to control the cleaning process.

[0005] 2. The cleaning cycle is long and will cause a waste of man-hours.

[0006] 3. The cleaning equipment involved is difficult to disinfect.

[0007] Since existing cleaning equipment and cleaning processes cannot solve the problems of difficult control, waste of man-hours and equipment disinfection, there is an urgent need for an automatic cleaning equipment and cleaning method that can overcome the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide an ultrasonic cleaning device and an ultrasonic cleaning method and application, which solves the technical problems existing in the above-mentioned prior art. The present invention has the advantages of high cleaning efficiency, good cleaning effect, labor saving, automatic disinfection and water saving, energy saving and environmental protection.

[0009] To achieve the above object, the technical solution of the present invention is:

[0010] An ultrasonic cleaning device, characterized in that it comprises:

[0011] The hanging tooling includes a drip sprinkler tooling body, a movable frame with hooks that can be mounted on the tooling body, and a plurality of stainless steel rods with clips that can be mounted on the movable frame with hooks;

[0012] A multi-pass ultrasonic cleaning tank is arranged on one side of a hanging tooling; the multi-pass ultrasonic cleaning tank comprises at least one purified water ultrasonic cleaning tank, at least one intermediate injection water ultrasonic cleaning tank, and at least two injection water ultrasonic cleaning tanks located in the last pass and used alternately; the two injection water ultrasonic cleaning tanks located in the last pass and used alternately perform cleaning and draining operations alternately; all ultrasonic cleaning tanks are uncovered; the purified water ultrasonic cleaning tank has a purified water inlet, a purified water rinse port, an overflow port, and a drain port; the intermediate injection water ultrasonic cleaning tank has an injection water inlet, an injection water rinse port, an overflow port, and a drain port; the two injection water ultrasonic cleaning tanks located in the last pass and used alternately have an injection water inlet, an injection water rinse port, an overflow port, and a drain port; the injection water discharged from the drain ports of the two injection water ultrasonic cleaning tanks located in the last pass and used alternately serves as supplementary water for the preceding intermediate injection water ultrasonic cleaning tank;

[0013] A multi-arm trolley is provided above the hanging tooling and the multi-pass ultrasonic cleaning tank. The multi-arm trolley is used to grab the movable hook frame on which the workpiece to be cleaned is hung on the hanging tooling and the movable hook frame on which the workpiece to be cleaned is hung in the multi-pass ultrasonic cleaning tank and move it to the next station.

[0014] A single-arm trolley is also provided above the multi-pass ultrasonic cleaning tank. The single-arm trolley is used to grab the movable hook frame hanging the workpiece to be cleaned in the last intermediate water injection ultrasonic cleaning tank and selectively move it to one of the two water injection ultrasonic cleaning tanks located in the last pass and used alternately; the condition for this selection is that the water injection ultrasonic cleaning tank is not in a draining state;

[0015] One side of the last pass of the multi-pass ultrasonic cleaning tank and the alternately used injection water ultrasonic cleaning tank is provided with a dripping tooling, and one side of the dripping tooling is a dehydration and piece picking waiting area.

[0016] The ultrasonic cleaning equipment is characterized in that: there are two purified water ultrasonic cleaning tanks, namely the first ultrasonic cleaning tank and the second ultrasonic cleaning tank; there are three intermediate injection water ultrasonic cleaning tanks, namely the third ultrasonic cleaning tank, the fourth ultrasonic cleaning tank and the fifth ultrasonic cleaning tank; the two injection water ultrasonic cleaning tanks located in the last pass and used alternately are the sixth ultrasonic cleaning tank and the seventh ultrasonic cleaning tank; the multi-arm trolley is sequentially arranged with five grab arms for grabbing the mobile hook frame; the injection water discharged from the drain outlets of the sixth ultrasonic cleaning tank and the seventh ultrasonic cleaning tank is used as supplementary water for the third ultrasonic cleaning tank, the fourth ultrasonic cleaning tank and the fifth ultrasonic cleaning tank.

[0017] The ultrasonic cleaning equipment is characterized in that the injection water discharged from the drain outlets of the two injection water ultrasonic cleaning pools located in the last pass and used alternately is first injected into a water tank, and the water tank then uses the injection water as supplementary water for the front-stage intermediate injection water ultrasonic cleaning pool after ultrafiltration.

[0018] The ultrasonic cleaning equipment is characterized in that the injection water discharged from the drain outlets of the two injection water ultrasonic cleaning pools located in the last pass and used alternately is first injected into the water tank through a water suction pump. When it is necessary to provide supplementary water to the front-stage intermediate injection water ultrasonic cleaning pool, it is pressurized by a pressure water pump and supplied to the front-stage intermediate injection water ultrasonic cleaning pool for water replenishment after two-stage ultrafiltration.

[0019] The ultrasonic cleaning equipment is characterized in that the drain outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool is also the high-temperature steam inlet, and high-temperature steam is fed into the drain outlet of each ultrasonic cleaning pool through a high-temperature steam pipe to perform high-temperature steam disinfection of each ultrasonic cleaning pool and its connecting pipes; during high-temperature steam disinfection, the multi-pass ultrasonic cleaning pool as a whole is in a sealed state or each ultrasonic cleaning pool is in a sealed state.

[0020] The ultrasonic cleaning equipment is characterized in that the movable hook frame is also provided with a counterweight to keep the workpiece to be cleaned suspended.

[0021] The ultrasonic cleaning equipment is characterized in that the dripping tooling can hold 3 workpieces, and one workpiece is automatically released each time the dripping is completed, and is moved to the dehydration and collection waiting area through a slide rail. The dehydration and collection waiting area can hold 2 workpieces, and a water receiving tray is reserved underneath.

[0022] The ultrasonic cleaning equipment is characterized in that: the drain outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool is connected to the waste water pipeline, the purified water inlet and purified water flushing port of the purified water ultrasonic cleaning pool are connected to the purified water pipeline, and the injection water inlet and injection water flushing port of the intermediate injection water ultrasonic cleaning pool and the two injection water ultrasonic cleaning pools located in the last pass and used alternately are connected to the injection water pipeline.

[0023] An ultrasonic cleaning method is characterized in that: the ultrasonic cleaning device as described above is used to perform the operation, and the method comprises the following steps:

[0024] A. Hang the workpiece to be cleaned on a stainless steel rod with a clip and place it on a movable hook frame, and then mount the movable hook frame on the tooling body of the hanging tooling;

[0025] B uses a multi-arm trolley to grab the mobile hook frame on which the workpiece to be cleaned is hung, and moves it to the first ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank. The multi-arm trolley also grabs the mobile hook frame on which the workpiece to be cleaned has been hung, which has been cleaned in the first ultrasonic cleaning tank, and moves it to the second ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank. Similarly, the multi-arm trolley also grabs the mobile hook frame on which the workpiece to be cleaned has been hung, which has been cleaned in the Nth ultrasonic cleaning tank, and moves it to the N+1th ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank.

[0026] C. After the workpiece has passed through multiple ultrasonic cleanings, together with the movable hook frame, it is grabbed by a single-arm trolley from the last intermediate water injection ultrasonic cleaning tank and moved to one of the two last-pass and alternately used water injection ultrasonic cleaning tanks. The water injection ultrasonic cleaning tank that is not in the drainage state is selected; while the other unselected water injection ultrasonic cleaning tank is in the drainage state, and the discharged injection water is filtered and used as the supplementary water for the preceding intermediate water injection ultrasonic cleaning tank;

[0027] D. After the workpiece has been cleaned in the final water injection ultrasonic cleaning tank, it is transported to the drip shower fixture for hanging drip shower dehydration.

[0028] E. The workpieces after being dehydrated by hanging dripping are moved to the dehydration waiting area, and then moved from the dehydration waiting area to the drying equipment to complete the cleaning.

[0029] An application of the ultrasonic cleaning method as described above in cleaning medical repair materials.

[0030] The invention has the above technical solution and therefore has the following advantages:

[0031] 1. The present invention designs a multi-pass ultrasonic cleaning equipment, which adopts an integrated automatic processing flow from picking up parts, cleaning each pass, hanging dripping dehydration, and sending for drying, thereby improving cleaning efficiency, reducing labor costs, and improving the controllability of cleaning quality.

[0032] 2. The multi-pass ultrasonic cleaning pool designed by the present invention not only increases the number of cleaning times for the workpiece to be cleaned, but also uses purified water and injection water for cleaning respectively. In particular, the injection water after the last cleaning is relatively clean itself. It would be a pity if it is directly discharged. Therefore, the present invention reuses the discharge water after the last cleaning after ultrafiltration, which plays a role in saving water resources and energy saving and environmental protection.

[0033] 3. The multi-pass ultrasonic cleaning tank designed by this invention utilizes two alternating ultrasonic cleaning tanks, particularly for the final cleaning pass. After each cleaning cycle, the injection water in one tank is drained and temporarily removed from use, replacing a separate, non-draining tank. Simultaneously, as the injection water drains, the upper cleaning pipe automatically opens to flush the tank walls. Each discharged injection water is then filtered through ultrafiltration and used as feed water for the previous three stages. After the cleaning cycle is complete, it is used as the next, final cleaning tank. Because this final cleaning cycle is crucial to the quality of the workpiece being cleaned, ensuring the tank is in a perfectly clean state for this final cleaning cycle is crucial.

[0034] 4. The present invention also designs a method of cleaning the ultrasonic cleaning equipment through water flushing and high-temperature steam sterilization to ensure the hygiene and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic structural diagram of the device of the present invention.

[0036] FIG2 is a schematic structural diagram of a multi-pass ultrasonic cleaning tank in the present invention. DETAILED DESCRIPTION

[0037] Please refer to Figures 1 and 2, which illustrate an ultrasonic cleaning device according to the present invention. The device comprises:

[0038] The hanging tool 1 includes a drip sprinkler tool 5, a tool body, a movable hook frame that can be set on the tool body, and a plurality of stainless steel rods with clips that can be set on the movable hook frame.

[0039] A multi-pass ultrasonic cleaning tank 2 is arranged on one side of the hanging tooling 1; the multi-pass ultrasonic cleaning tank 2 includes at least one purified water ultrasonic cleaning tank, at least one intermediate injection water ultrasonic cleaning tank and at least two injection water ultrasonic cleaning tanks located in the last pass and used alternately; the two injection water ultrasonic cleaning tanks located in the last pass and used alternately perform cleaning and drainage operations alternately; all ultrasonic cleaning tanks are uncovered; the purified water ultrasonic cleaning tank has a purified water inlet, a purified water rinse port, an overflow port and a drain port; the intermediate injection water ultrasonic cleaning tank has an injection water inlet, an injection water rinse port, an overflow port and a drain port; the two injection water ultrasonic cleaning tanks located in the last pass and used alternately have an injection water inlet, an injection water rinse port, an overflow port and a drain port; the injection water discharged from the drain ports of the two injection water ultrasonic cleaning tanks located in the last pass and used alternately serves as supplementary water for the preceding intermediate injection water ultrasonic cleaning tank.

[0040] The ultrasonic cleaning tanks of this invention are all equipped with an ultrasonic vibrator head to produce an ultrasonic water cleaning effect within the cleaning tank. This ultrasonic vibrator head can be a 50W / 60W / 100W model, such as the JTS-HNQ28K ultrasonic cleaning head from Shenzhen Jietai Ultrasonic Cleaning Equipment. Each ultrasonic cleaning cycle lasts 5 to 15 minutes (adjustable). The ultrasonic cleaning vibrator must be secured with epoxy resin glue and threads. The epoxy resin glue is temperature-resistant >140°C. The ultrasonic power is 3.6 kW to 4.0 kW. Of course, the ultrasonic vibrator head of this invention is not limited to this model.

[0041] A multi-arm trolley 3 is provided above the hanging tooling 1 and the multi-pass ultrasonic cleaning tank 2. The multi-arm trolley 3 is used to grab the movable hook frame on the hanging tooling 1 that has hung the workpiece to be cleaned and the movable hook frame on the hanging tooling 1 that has hung the workpiece to be cleaned and has been placed in the multi-pass ultrasonic cleaning tank 2 and move them to the next workstation.

[0042] A single-arm trolley 4 is also provided above the multi-pass ultrasonic cleaning tank 2. The single-arm trolley 4 is used to grab the movable hook frame hanging the workpiece to be cleaned in the last intermediate water injection ultrasonic cleaning tank and selectively move it to one of the two water injection ultrasonic cleaning tanks located in the last pass and used alternately; the condition for this selectivity is that the water injection ultrasonic cleaning tank is not in a drainage state.

[0043] A dripping fixture 5 is provided on one side of the last pass of the multi-pass ultrasonic cleaning tank 2 and the alternately used injection water ultrasonic cleaning tank. One side of the dripping fixture 5 is a dehydration and piece picking waiting area 6.

[0044] The present invention is further described below using a heart repair material as the cleaning object (workpiece) and an apparatus using a six-pass ultrasonic cleaning method.

[0045] As shown in Figure 2, there are two purified water ultrasonic cleaning tanks, namely the first ultrasonic cleaning tank 21 and the second ultrasonic cleaning tank 22; there are three intermediate injection water ultrasonic cleaning tanks, namely the third ultrasonic cleaning tank 23, the fourth ultrasonic cleaning tank 24, and the fifth ultrasonic cleaning tank 25. After cleaning the workpiece, the water in the first to fifth ultrasonic cleaning tanks is directly discharged from the drain as waste water. The two injection water ultrasonic cleaning tanks located in the last pass and used alternately are the sixth ultrasonic cleaning tank 26 and the seventh ultrasonic cleaning tank 27. The multi-arm trolley 3 is sequentially arranged with five grab arms 31 for grabbing the mobile hook frame. The injection water discharged from the drains of the sixth ultrasonic cleaning tank 26 and the seventh ultrasonic cleaning tank 27 is used as supplementary water for the third ultrasonic cleaning tank 23, the fourth ultrasonic cleaning tank 24, and the fifth ultrasonic cleaning tank 25.

[0046] Purified water is used for cleaning in both the first ultrasonic cleaning tank 21 and the second ultrasonic cleaning tank 22. During the cleaning process, purified water is continuously replenished and discharged, and the replenishment / discharge amount is adjusted according to the water production; fresh purified water is also used to blow out floating objects from the overflow port.

[0047] Injection water is used for cleaning in the third ultrasonic cleaning tank 23, the fourth ultrasonic cleaning tank 24 and the fifth ultrasonic cleaning tank 25. During the cleaning process, injection water is continuously replenished and discharged. The replenishment / discharge volume of each cleaning time is approximately 1 / 3 of the water tank 7. The replenished injection water comes from the regenerated water after ultrafiltration after discharge from the sixth ultrasonic cleaning tank 26 or the seventh ultrasonic cleaning tank 27. Freshly prepared purified water is also used to prepare the injection water for blowing out floating objects from the overflow port.

[0048] In the sixth and seventh ultrasonic cleaning tanks 26 and 27, the injection water discharged from the drains of these two alternating injection water ultrasonic cleaning tanks, located in the final stage, is first fed into a water tank 7. This water tank 7 then filters the injection water through ultrafiltration and serves as make-up water for the preceding intermediate injection water ultrasonic cleaning tanks (i.e., evenly replenishing the third, fourth, and fifth ultrasonic cleaning tanks 23 and 24, respectively). Specifically, the injection water discharged from the drain is first fed into the water tank 7 via a suction pump. When replenishment water is needed for the preceding intermediate injection water ultrasonic cleaning tanks, it is pressurized by a pressure pump and then, after two stages of ultrafiltration, supplied to the preceding intermediate injection water ultrasonic cleaning tanks for replenishment. The sixth and seventh ultrasonic cleaning tanks 26 and 27 are used alternately. After each cleaning cycle, the injection water in each cleaning tank is drained. Simultaneously, the upper cleaning pipe automatically opens to flush the tank walls. Each discharged injection water is then filtered through ultrafiltration and used as make-up water for the preceding three stages. Since this is the final cleaning step and is crucial to the cleaning quality of the object being cleaned, it is necessary to ensure that the cleaning tank is in a very clean state for the final cleaning. This design is therefore adopted. Furthermore, since the injection water after the final cleaning step is also relatively clean, it would be a waste to directly discharge it. Therefore, the present invention reuses the discharge water after the final cleaning step after ultrafiltration, thus saving water resources and being energy-efficient and environmentally friendly.

[0049] After the equipment is used, in order to ensure that the equipment maintains a good sanitary environment when it is used next time, the drain outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool 2 is also the high-temperature steam inlet, and high-temperature steam is sent into the drain outlet of each ultrasonic cleaning pool through the high-temperature steam pipe 81 to perform high-temperature steam disinfection of each ultrasonic cleaning pool and its connecting pipes; during high-temperature steam disinfection, the multi-pass ultrasonic cleaning pool 2 as a whole is in a sealed state or each ultrasonic cleaning pool is in a sealed state.

[0050] In order to maintain a good sanitary environment for the equipment, in addition to the above-mentioned high-temperature steam disinfection, each ultrasonic cleaning pool can also use water flushing to clean the pool wall. Newly made purified water or injection water with a set pressure is flushed into the pool wall from the cleaning port for cleaning, and then discharged through the drain after cleaning.

[0051] When cleaning relatively light objects such as heart repair materials, the movable hook frame is also provided with a counterweight to keep the workpiece to be cleaned suspended.

[0052] In the present invention, the dripping fixture 5 can hold 3 workpieces. After dripping, one workpiece is automatically released each time and goes to the dehydration and pickup waiting area 6 through a slide rail. The dehydration and pickup waiting area 6 can hold 2 workpieces, and a water receiving tray is reserved below.

[0053] In the present invention, the drain outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool 2 is connected to the waste water pipe 82, the purified water inlet and purified water flushing port of the purified water ultrasonic cleaning pool are connected to the purified water pipe 83, and the injection water inlet and injection water flushing port of the intermediate injection water ultrasonic cleaning pool and the two injection water ultrasonic cleaning pools located in the last pass and used alternately are connected to the injection water pipe 84.

[0054] The present invention also discloses an ultrasonic cleaning method, which is implemented using the ultrasonic cleaning equipment described above and comprises the following steps:

[0055] A hangs the workpiece to be cleaned on a stainless steel rod with a clip and places it on a movable frame with hooks, and then places the movable frame with hooks on the tooling body of the hanging tooling 1.

[0056] B uses the multi-arm trolley 3 to grab the mobile hook frame on which the workpiece to be cleaned is hung and placed on the hanging tooling 1, and moves it and places it into the first ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank 2; the multi-arm trolley 3 also simultaneously grabs the mobile hook frame on which the workpiece to be cleaned has been hung and has been cleaned in the first ultrasonic cleaning tank, and moves it and places it into the second ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank 2; by analogy, the mobile hook frame on which the workpiece to be cleaned has been hung and has been cleaned in the Nth ultrasonic cleaning tank is also grabbed by the multi-arm trolley 3 at the same time, and moves it and places it into the N+1th ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank 2.

[0057] C The workpiece after multiple ultrasonic cleanings is grabbed by the single-arm trolley 4 from the last intermediate water injection ultrasonic cleaning tank together with the movable hook frame and moved to one of the two water injection ultrasonic cleaning tanks located in the last pass and used alternately. The water injection ultrasonic cleaning tank selects the one that is not in the drainage state; the other unselected water injection ultrasonic cleaning tank is in the drainage state, and the injection water discharged from it is filtered and used as the supplementary water for the previous intermediate water injection ultrasonic cleaning tank.

[0058] D The workpiece after being cleaned in the final water injection ultrasonic cleaning tank is transported to the dripping fixture 5 for hanging dripping dehydration.

[0059] E The workpieces after being dehydrated by hanging dripping are moved into the dehydration and pickup waiting area 6, and then moved from the dehydration and pickup waiting area 6 into the drying equipment to complete the cleaning.

[0060] In addition to being used for cleaning heart repair materials, the device of the present invention can also be used for cleaning other medical repair materials or other cleaning objects, and has a wide range of application fields.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. An ultrasonic cleaning device, characterized in that: It includes, A hanging tool (1), the hanging tool (1) comprising a drip sprinkler tool (5) comprising a tool body, a movable hook frame that can be mounted on the tool body, and a plurality of stainless steel rods with clips that can be mounted on the movable hook frame; A multi-pass ultrasonic cleaning pool (2) is arranged on one side of the hanging tooling (1); the multi-pass ultrasonic cleaning pool (2) comprises at least one purified water ultrasonic cleaning pool, at least one intermediate injection water ultrasonic cleaning pool and at least two injection water ultrasonic cleaning pools located in the last pass and used alternately; the two injection water ultrasonic cleaning pools located in the last pass and used alternately perform cleaning and drainage operations alternately; all ultrasonic cleaning pools are uncovered; the purified water ultrasonic cleaning pool has a purified water inlet, a purified water flushing port, an overflow port and a drain port; the intermediate injection water ultrasonic cleaning pool has an injection water inlet, an injection water flushing port, an overflow port and a drain port; the two injection water ultrasonic cleaning pools located in the last pass and used alternately have an injection water inlet, an injection water flushing port, an overflow port and a drain port; the injection water discharged from the drain ports of the two injection water ultrasonic cleaning pools located in the last pass and used alternately serves as supplementary water for the preceding intermediate injection water ultrasonic cleaning pool; A multi-arm trolley (3) is arranged above the hanging tool (1) and the multi-pass ultrasonic cleaning tank (2), and the multi-arm trolley (3) is used to grab the mobile hook frame on which the workpiece to be cleaned is hung on the hanging tool (1) and the mobile hook frame on which the workpiece to be cleaned is hung and has been placed in the multi-pass ultrasonic cleaning tank (2), and move to the next station; A single-arm trolley (4) is also provided above the multi-pass ultrasonic cleaning pool (2), and the single-arm trolley (4) is used to grab a movable hook frame hanging a workpiece to be cleaned in the last intermediate water injection ultrasonic cleaning pool and selectively move it to one of the two water injection ultrasonic cleaning pools located in the last pass and used alternately; the condition for the selectivity is that the water injection ultrasonic cleaning pool is not in a drainage state; A dripping fixture (5) is provided on one side of the last-pass and alternately used injection water ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank (2), and one side of the dripping fixture (5) is a dehydration and piece picking waiting area (6).

2. The ultrasonic cleaning device according to claim 1, characterized in that: The purified water ultrasonic cleaning pool has two, namely a first ultrasonic cleaning pool (21) and a second ultrasonic cleaning pool (22); the intermediate injection water ultrasonic cleaning pool has three, namely a third ultrasonic cleaning pool (23), a fourth ultrasonic cleaning pool (24) and a fifth ultrasonic cleaning pool (25); the two injection water ultrasonic cleaning pools located in the last pass and used alternately are a sixth ultrasonic cleaning pool (26) and a seventh ultrasonic cleaning pool (27); the multi-arm trolley (3) is sequentially arranged with five gripping arms (31) for gripping a movable hook frame; the injection water discharged from the drainage ports of the sixth ultrasonic cleaning pool (26) and the seventh ultrasonic cleaning pool (27) is used as supplementary water for the third ultrasonic cleaning pool (23), the fourth ultrasonic cleaning pool (24) and the fifth ultrasonic cleaning pool (25).

3. The ultrasonic cleaning device according to claim 1, characterized in that: The injection water discharged from the drainage outlets of the two injection water ultrasonic cleaning tanks located in the last pass and used alternately is first injected into the water tank (7), and the water tank (7) then uses the injection water as supplementary water for the front-stage intermediate injection water ultrasonic cleaning tank after ultrafiltration.

4. The ultrasonic cleaning device according to claim 3, characterized in that: The injection water discharged from the drainage outlets of the two injection water ultrasonic cleaning pools located in the last pass and used alternately is first injected into the water tank (7) through the water suction pump. When it is necessary to provide supplementary water to the front-stage intermediate injection water ultrasonic cleaning pool, it is pressurized by the pressure water pump and supplied to the front-stage intermediate injection water ultrasonic cleaning pool for water replenishment after two-stage ultrafiltration.

5. The ultrasonic cleaning device according to claim 1, characterized in that: The drain outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool (2) is also the high-temperature steam inlet. High-temperature steam is fed into each ultrasonic cleaning pool from the drain outlet through a high-temperature steam pipe (81) to perform high-temperature steam sterilization of each ultrasonic cleaning pool and its connecting pipes. During high-temperature steam sterilization, the multi-pass ultrasonic cleaning pool (2) is in a sealed state as a whole or each ultrasonic cleaning pool is in a sealed state.

6. The ultrasonic cleaning device according to claim 1, characterized in that: The movable hook frame is also provided with a counterweight body which enables the workpiece to be cleaned to remain suspended.

7. The ultrasonic cleaning device according to claim 1, characterized in that: The drip shower tooling (5) can hold three workpieces. After the drip shower is finished, one workpiece is automatically released each time and goes to the dehydration and piece removal waiting area (6) through a slide rail. The dehydration and piece removal waiting area (6) can hold two workpieces, and a water receiving tray is reserved at the bottom.

8. The ultrasonic cleaning device according to claim 1, characterized in that: The drainage outlet of each ultrasonic cleaning pool in the multi-pass ultrasonic cleaning pool (2) is connected to a waste water pipeline (82), the purified water inlet and purified water flushing outlet of the purified water ultrasonic cleaning pool are connected to a purified water pipeline (83), and the injection water inlet and injection water flushing outlet of the intermediate injection water ultrasonic cleaning pool and the two injection water ultrasonic cleaning pools located in the last pass and used alternately are connected to an injection water pipeline (84).

9. An ultrasonic cleaning method, characterized in that: The operation is carried out using the ultrasonic cleaning equipment as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, which comprises the following steps: A hangs the workpiece to be cleaned on a stainless steel rod with a clamp and places it on a movable hook frame, and then the movable hook frame is mounted on the tooling body of the hanging tooling (1); B grabs the mobile hook frame on which the workpiece to be cleaned is suspended and placed on the suspension tooling (1) by means of a multi-arm trolley (3), and moves and places the frame into the first ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank (2); the multi-arm trolley (3) also grabs the mobile hook frame on which the workpiece to be cleaned has been suspended and has been cleaned in the first ultrasonic cleaning tank, and moves and places the frame into the second ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank (2); by analogy, the mobile hook frame on which the workpiece to be cleaned has been suspended and has been cleaned in the Nth ultrasonic cleaning tank is also grabbed by the multi-arm trolley (3), and moves and places the frame into the N+1th ultrasonic cleaning tank of the multi-pass ultrasonic cleaning tank (2); C. The workpiece after multiple ultrasonic cleanings, together with the movable hook frame, is grabbed by the single-arm trolley (4) from the last intermediate water injection ultrasonic cleaning pool and moved to one of the two water injection ultrasonic cleaning pools located in the last pass and used alternately. The water injection ultrasonic cleaning pool is the one that is not in a drainage state; and the other unselected water injection ultrasonic cleaning pool is in a drainage state, and the discharged injection water is filtered and used as supplementary water for the previous intermediate water injection ultrasonic cleaning pool; D. After the workpiece has been cleaned in the final water injection ultrasonic cleaning tank, it is transported to the drip shower tooling (5) for hanging drip shower dehydration; E The workpieces after being dehydrated by hanging dripping are moved into the dehydration and picking-up waiting area (6), and then moved from the dehydration and picking-up waiting area (6) into the drying equipment, and the cleaning is completed.

10. Use of the ultrasonic cleaning method according to claim 9 in cleaning medical repair materials.

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