Medical waste collection apparatus and control method

Abstract

The application relates to the field of medical equipment, and particularly discloses a medical waste collecting device which comprises a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve and a first suction assembly, the first vacuum generator is connected with the top of the first liquid tank, the second vacuum generator is connected with the top of the second liquid tank, the switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet, and the switching valve can be switched between a state that the first liquid inlet is communicated with the first liquid outlet and a state that the first liquid outlet is communicated with the second liquid outlet. Negative pressure suction can be realized, and the first liquid tank and the second liquid tank can be simultaneously used through two consumable boxes; or the first liquid tank and the second liquid tank can be used in series under the condition that one consumable box is used, so that the change demand of the liquid tank capacity under different occasions is met.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a medical waste collection device and control method. Background Technology

[0002] During certain surgical procedures, waste of various types, including liquids, semi-solids, and solids, is inevitably generated. This includes bodily fluids such as blood, as well as irrigation solutions introduced into the surgical site. Solid and semi-solid waste generated during surgery includes tissue fragments and small pieces of surgical material that may remain at the site of the procedure. Ideally, waste should be collected as soon as it is generated, thus preventing contamination of the surgical site and avoiding becoming a biohazard in the operating room or other surgical locations.

[0003] In the existing technology, there are various waste collection systems that allow medical personnel to collect waste generated during or after surgery. Their main principle is to use a vacuum source to generate suction force to draw waste from the surgical site into a specific collection container. That is, after the system is activated, the suction force generated by the vacuum source reaches the surgical site, thereby drawing the waste through tubing in contact with the surgical site into a specific collection container.

[0004] like Figure 1 As shown, in the prior art, such as the NEPTUNE waste collection device manufactured by Stryker, the waste collection device includes a mobile unit 1', a vacuum source 2', a consumable box, and a waste collection tank. Two waste collection tanks of different capacities are vertically arranged. The bottom of the upper waste collection tank 3' is connected to the top of the lower waste collection tank 4' via a valve 6'. Both waste collection tanks are equipped with consumable boxes. During use, a vacuum source creates negative pressure inside the waste collection tank, which is then piped into the consumable box to draw waste into the waste collection tank. When using one set of consumable boxes, once the upper waste collection tank is full, the valve can be opened to discharge the waste into the lower waste collection tank. However, suction must be stopped during the discharge process to prevent uneven pressure between the two tanks from affecting the discharge.

[0005] In addition, to ensure that waste in the waste collection tank can be completely discharged after storage, the bottom of the waste collection tank is often an irregular, sloping surface. However, in order to accurately measure the liquid level in the tank, a fixed amount of liquid needs to be pumped in in advance so that the liquid level sensor 5' reaches the initial measurement height. The procedure for pumping in the fixed amount of liquid is complex and time-consuming. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a medical waste collection device and control method that enables negative pressure suction and allows simultaneous use of a first liquid tank and a second liquid tank via two consumable boxes; alternatively, the first and second liquid tanks can be connected in series using a single consumable box to meet varying liquid tank capacity requirements in different situations.

[0007] To address the aforementioned technical problems, embodiments of the present invention provide a medical waste collection device, comprising a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve, and a first suction assembly. The first vacuum generator is connected to the top of the first liquid tank to generate negative pressure on the first liquid tank; The second vacuum generator is connected to the top of the second liquid tank and is used to generate negative pressure on the second liquid tank; The switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet. The first suction component is connected to the first liquid inlet through a first liquid inlet pipe. The first liquid outlet is connected to the first liquid tank through a first liquid outlet pipe. The second liquid outlet is connected to the second liquid tank through a second liquid outlet pipe. The switching valve can switch between a state where the first inlet is connected to the first outlet and a state where the first outlet is connected to the second outlet.

[0008] As an improvement to the above solution, the first suction assembly includes a consumable box mounting base, a suction consumable box, and a suction tube. The suction consumable box is disposed on the consumable box mounting base, and the suction tube is connected to the suction consumable box.

[0009] As an improvement to the above solution, a second suction component is also included. The switching valve is further provided with a second liquid inlet. The second suction component is connected to the second liquid inlet through a second liquid inlet pipe. The switching valve can control the first liquid inlet to be connected to the first liquid outlet, the second liquid inlet to be connected to the second liquid outlet, or the first liquid inlet to be connected to the second liquid outlet, and the second liquid inlet to be connected to the first liquid outlet.

[0010] As an improvement to the above solution, the structure of the second suction component is the same as that of the first suction component.

[0011] As an improvement to the above solution, the switching valve is a four-way valve, which includes a four-way valve body and a four-way valve core. The four-way valve core has a first valve core channel and a second valve core channel. The four-way valve core can rotate within the four-way valve body to connect a predetermined valve port through the first valve core channel and the second valve core channel.

[0012] As an improvement to the above solution, the switching valve further includes a four-way actuator, which is used to control the rotation of the four-way valve core within the four-way valve body.

[0013] As an improvement to the above solution, the switching valve includes a first three-way valve and a second three-way valve; the first three-way valve has a first three-way inlet, a first three-way outlet, and a second three-way outlet, and the second three-way valve has a second three-way inlet, a third three-way outlet, and a fourth three-way outlet; wherein, the first three-way outlet and the third three-way outlet are connected to the first liquid tank; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank; the first three-way inlet is connected to the first liquid inlet, and the second three-way inlet is connected to the second liquid inlet.

[0014] As an improvement to the above solution, the first three-way outlet and the third three-way outlet are connected to the first liquid tank through a first three-way connector; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank through a second three-way connector.

[0015] As an improvement to the above solution, the first three-way connector includes a first connector inlet, a second connector inlet, and a first connector outlet; the second three-way connector has a third connector inlet, a fourth connector inlet, and a second connector outlet; the first three-way inlet is connected to the first liquid inlet, the second three-way inlet is connected to the second liquid inlet, the first connector outlet is connected to the first liquid outlet, and the second connector outlet is connected to the second liquid outlet; the first three-way outlet is connected to the first connector inlet, the second three-way outlet is connected to the third connector inlet, the third three-way outlet is connected to the second connector inlet, and the fourth three-way outlet is connected to the fourth connector inlet.

[0016] As an improvement to the above solution, the switching valve further includes a first three-way actuator and a second three-way actuator. The first three-way actuator is used to control the first three-way inlet to switch between the first three-way outlet and the second three-way outlet; the second three-way actuator is used to control the second three-way inlet to switch between the third three-way outlet and the fourth three-way outlet.

[0017] As an improvement to the above solution, the switching valve includes a first two-way valve, a second two-way valve, a third two-way valve, and a fourth two-way valve; wherein, one end of the first two-way valve and the second two-way valve is connected to the first liquid inlet, and the other end is connected to the first liquid tank; one end of the third two-way valve and the fourth two-way valve is connected to the second liquid inlet, and the other end is connected to the second liquid tank.

[0018] As an improvement to the above solution, the first liquid tank and the second liquid tank are placed side by side at the same height, and the first liquid tank and the second liquid tank are respectively equipped with a first liquid level sensor and a second liquid level sensor.

[0019] As an improvement to the above solution, a control unit is also included, which is used to control the switching valve to operate based on the liquid level values ​​of the first liquid level sensor and the second liquid level sensor.

[0020] As an improvement to the above solution, the first vacuum generator and the second vacuum generator are respectively connected to a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are connected to the control unit; when the first suction assembly or the second suction assembly is connected to a liquid tank, the control unit controls the pressure in the first liquid tank through the first proportional valve and the first vacuum generator; when the first suction assembly or the second suction assembly is connected to the second liquid tank, the control unit controls the pressure in the second liquid tank through the second proportional valve and the second vacuum generator.

[0021] Accordingly, the present invention also provides a control method for a medical waste collection device, the medical waste collection device comprising a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve, and a first suction assembly. The first vacuum generator is connected to the top of the first liquid tank to generate negative pressure on the first liquid tank; The second vacuum generator is connected to the top of the second liquid tank and is used to generate negative pressure on the second liquid tank; The switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet. The first suction component is connected to the first liquid inlet through a first liquid inlet pipe. The first liquid outlet is connected to the first liquid tank through a first liquid outlet pipe. The second liquid outlet is connected to the second liquid tank through a second liquid outlet pipe. When it is necessary to switch the connection state of the first inlet port between the first outlet port and the second outlet port, a control signal is sent to the switching valve.

[0022] As an improvement to the above solution, the medical waste collection device further includes a second suction assembly, and the switching valve is also provided with a second liquid inlet. The second suction assembly is connected to the second liquid inlet through a second liquid inlet pipe. When it is necessary to switch the connection state between the first liquid inlet and the second liquid inlet between the first liquid outlet and the second liquid outlet, a control signal is sent to the switching valve.

[0023] As an improvement to the above solution, the switching valve is a four-way valve, which includes a four-way valve body and a four-way valve core. The four-way valve core has a first valve core channel and a second valve core channel. When a switching signal is received, the four-way valve core is driven to rotate in the four-way valve body by a four-way actuator, thereby switching the connection state of the first liquid inlet and the second liquid inlet between the first liquid outlet and the second liquid outlet.

[0024] As an improvement to the above solution, the switching valve includes a first three-way valve and a second three-way valve; the first three-way valve has a first three-way inlet, a first three-way outlet, and a second three-way outlet, and the second three-way valve has a second three-way inlet, a third three-way outlet, and a fourth three-way outlet; wherein, the first three-way outlet and the third three-way outlet are connected to the first liquid tank; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank; the first three-way inlet is connected to the first liquid inlet, and the second three-way inlet is connected to the second liquid inlet; When a switching signal is received, the first three-way actuator controls the first three-way inlet to switch between the first three-way outlet and the second three-way outlet; the second three-way actuator controls the second three-way inlet to switch between the third three-way outlet and the fourth three-way outlet.

[0025] As an improvement to the above solution, the switching valve includes a first two-way valve, a second two-way valve, a third two-way valve, and a fourth two-way valve; wherein, one end of the first two-way valve and the second two-way valve are connected to the first liquid inlet, and the other end is connected to the first liquid tank; one end of the third two-way valve and the fourth two-way valve are connected to the second liquid inlet, and the other end is connected to the second liquid tank; when a switching signal is received, the on / off state of the first liquid inlet and the second liquid inlet is switched between the first liquid outlet and the second liquid outlet by controlling the on / off state of the first two-way valve, the second two-way valve, the third two-way valve, and the fourth two-way valve.

[0026] As an improvement to the above solution, a control unit is also included; the first liquid tank and the second liquid tank are placed side by side at the same height, and the first liquid tank and the second liquid tank are respectively provided with a first liquid level sensor and a second liquid level sensor; the control unit sends a control signal to the switching valve according to the liquid level signals of the first liquid level sensor and the second liquid level sensor.

[0027] As an improvement to the above solution, the first vacuum generator and the second vacuum generator are respectively connected to a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are connected to the control unit; when the first suction assembly or the second suction assembly is connected to a liquid tank, the control unit controls the pressure in the first liquid tank through the first proportional valve and the first vacuum generator; when the first suction assembly or the second suction assembly is connected to the second liquid tank, the control unit controls the pressure in the second liquid tank through the second proportional valve and the second vacuum generator.

[0028] Implementing the embodiments of the present invention has the following beneficial effects: The above structure allows for the simultaneous use of two consumable boxes, enabling the simultaneous use of the first and second liquid reservoirs; alternatively, a single consumable box can be used, connecting the first and second liquid reservoirs in series to meet varying capacity requirements in different situations. Furthermore, this structure ensures that the first and second liquid reservoirs maintain approximately the same negative pressure, reducing switching time. Switching can be completed instantaneously, with minimal impact on the negative pressure at the suction end, thus not interfering with surgical procedures.

[0029] The switching valve can be a four-way valve, comprising a four-way valve body and a four-way valve core. The four-way valve core has a first valve core channel and a second valve core channel. The four-way valve core can rotate within the four-way valve body, connecting a predetermined valve port through the first and second valve core channels. The four-way valve can be manually driven or driven by a motor or pneumatic assembly. The four-way valve core can switch once every 90 degrees of rotation, providing sensitive switching and stable and reliable operation.

[0030] The switching valve can also consist of two three-way valves and two three-way connectors. The three-way valves enable different connection combinations between the first suction assembly, the second suction assembly and the first liquid tank and the second liquid tank. The adjustment is more flexible, and the first suction assembly or the second suction assembly can be connected to the first liquid tank and the second liquid tank at the same time. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of existing medical waste collection equipment; Figure 2 This is a schematic diagram of a medical waste collection device according to the present invention; Figure 3 This is another schematic diagram of a medical waste collection device according to the present invention; Figure 4 yes Figure 3 The diagram shows another state of the switching valve of a medical waste collection device. Figure 5 This is a schematic diagram of the structure of a medical waste collection device according to the present invention; Figure 6 This is a schematic diagram of the switching valve according to the first embodiment of the present invention; Figure 7 yes Figure 6 The schematic diagram shows another state of the switching valve. Figure 8 This is a schematic diagram of the switching valve according to the second embodiment of the present invention; Figure 9 This is a schematic diagram of the switching valve according to the third embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0033] Example 1 like Figure 2 , 4 As shown in Figure 5, the first embodiment of the present invention provides a medical waste collection device, including a first liquid tank 1, a second liquid tank 2, a first vacuum generator 3, a second vacuum generator 4, a switching valve 5, and a first suction assembly 6. The first vacuum generator 3 is connected to the top of the first liquid tank 1 and is used to generate negative pressure on the first liquid tank 1. The second vacuum generator 4 is connected to the top of the second liquid tank 2 and is used to generate negative pressure on the second liquid tank 2. The switching valve 5 is provided with a first inlet 51, a first outlet 52, and a second outlet 53. The first suction assembly 6 is connected to the first inlet 51 through a first inlet pipe 61, the first outlet 52 is connected to the first liquid tank 1 through a first outlet pipe 521, and the second outlet 53 is connected to the second liquid tank 2 through a second outlet pipe 531. The switching valve 5 can switch between a state where the first inlet 51 is connected to the first outlet 52 and a state where the first outlet 52 is connected to the second outlet 53.

[0034] The above structure allows for the simultaneous use of two consumable boxes, enabling the simultaneous use of the first liquid tank 1 and the second liquid tank 2; alternatively, it allows for the use of a single consumable box, with the first liquid tank 1 and the second liquid tank 2 connected in series to meet varying liquid tank capacity requirements in different situations. Furthermore, this structure ensures that the first liquid tank 1 and the second liquid tank 2 maintain approximately the same negative pressure, reducing switching time. Switching can be completed quickly with minimal impact on the negative pressure at the suction end, thus not interfering with surgical procedures performed by medical personnel.

[0035] The first suction component 6 includes a consumable box mounting base 62, a suction consumable box 63, and a suction tube 64. The suction consumable box 63 is disposed on the consumable box mounting base 62, and the suction tube 64 is connected to the suction consumable box 63.

[0036] Combination Figure 3Depending on the application requirements, a second suction assembly 7 may also be included. The switching valve 5 is further provided with a second liquid inlet 54. The second suction assembly 7 is connected to the second liquid inlet 54 through a second liquid inlet pipe 71. The switching valve 5 can control the connection between the first liquid inlet 51 and the first liquid outlet 52, and between the second liquid inlet 54 and the second liquid outlet 53, or between the first liquid inlet 51 and the second liquid outlet 53, and between the second liquid inlet 54 and the first liquid outlet 52. The structure of the second suction assembly 7 is the same as that of the first suction assembly 6.

[0037] It should be noted that the operator can establish a connection between the patient and the first liquid tank 1 through the first suction component 6; when the second suction component 7 is installed, the first suction component 6 and the second suction component 7 can work simultaneously to achieve suction function for two parts. In this embodiment, the second suction component 7 can be pre-set or temporarily installed as needed before use, saving usage costs.

[0038] Combination Figure 6 and Figure 7 Preferably, the switching valve 5 is a four-way valve 55, which includes a four-way valve body 551 and a four-way valve core 552. The four-way valve core 552 has a first valve core channel 553 and a second valve core channel 554. The four-way valve core 552 can rotate within the four-way valve body 551, connecting a predetermined valve port through the first valve core channel 553 and the second valve core channel 554. The switching valve may also include a four-way actuator, which controls the rotation of the four-way valve core 552 within the four-way valve body 551. The four-way actuator is preferably an electric actuator, i.e., the electric actuator commonly used in the ball valve field, but a pneumatic actuator can also be used. The four-way valve core 552 can be a 90-degree rotating four-way switch, i.e., one state at 0 degrees and another state at 90 degrees, achieving different states of the two positions through switching control. Alternatively, it can be a 360-degree rotating valve, using analog control of the ball valve position, with sensitive switching and stable and reliable operation. Preferably, the electric actuator has a self-resetting function, that is, after each power failure, the four-way valve core 552 returns to its original position.

[0039] To avoid the impact of vertically connected liquid tanks on the accuracy of the liquid level sensors, the first liquid tank 1 and the second liquid tank 2 are placed side by side at the same height. The first liquid tank 1 and the second liquid tank 2 are respectively equipped with a first liquid level sensor 81 and a second liquid level sensor 82. In this embodiment, the first liquid tank 1 and the second liquid tank 2 are arranged side by side, and the switching of their suction channels is achieved through a switching valve 5 located above them. After each cleaning, a pre-filling liquid is pumped in, and no further pre-filling liquid needs to be added after switching. This solves the problem in the prior art where a certain amount of liquid needs to be pumped into the upper tank before use, making operation simpler and shortening equipment maintenance time. Preferably, the medical waste collection device also includes a control unit 10, which is used to control the operation of the switching valve 5 based on the liquid level values ​​of the first liquid level sensor 81 and the second liquid level sensor 82.

[0040] Preferably, the first vacuum generator 3 and the second vacuum generator 4 are respectively connected to a first proportional valve 91 and a second proportional valve 92, and both the first proportional valve 91 and the second proportional valve 92 are connected to the control unit 10. Both the first vacuum generator 3 and the second vacuum generator 4 can be vacuum pumps. When the first suction assembly 6 or the second suction assembly 7 is connected to a liquid tank, the control unit 10 controls the pressure inside the first liquid tank 1 through the first proportional valve 91 and the first vacuum generator 3; when the first suction assembly 6 or the second suction assembly 7 is connected to the second liquid tank 2, the control unit 10 controls the pressure inside the second liquid tank 2 through the second proportional valve 92 and the second vacuum generator 4.

[0041] The working principle of this embodiment is as follows: First, depending on the needs of the suction application, choose to use the first suction component 6 alone or install the second suction component 7 for simultaneous use.

[0042] If the first suction assembly 6 is used alone, the switching valve 5 is adjusted before suction to ensure that the first valve core channel 553 or the second valve core channel 554 of the four-way valve core 552 connects the first inlet 51 and the first outlet 52, that is, the first suction assembly 6 is connected to the first liquid tank 1. The patient's medical waste is suctioned by the negative pressure of the first liquid tank 1. When the liquid level sensor 8 detects that the first liquid tank 1 has reached a certain height, the four-way valve core 552 can be rotated manually or automatically to connect the first inlet 51 and the second outlet 53, that is, the first suction assembly 6 is connected to the second liquid tank 2. The suction operation continues by the negative pressure of the second liquid tank 2. In this embodiment, the control unit 10 sends a control signal to the switching valve 5 based on the liquid level signals from the first liquid level sensor 81 and the second liquid level sensor 82. When a switching signal is received, the control unit 10 drives the four-way valve core 552 to rotate within the four-way valve body 551 via a four-way actuator, thereby switching the connection state between the first inlet 51 and the second inlet 52 between the first outlet 51 and the second outlet 53. To establish negative pressure in the second liquid tank 2 in advance, a preliminary liquid level height can be set in the first liquid tank 1 and the second liquid tank 2. When the first liquid tank 1 or the second liquid tank 2 reaches the preliminary liquid level height, the vacuum generator of the other liquid tank is turned on so that the liquid tank forms the same negative pressure as the other liquid tank in use before switching.

[0043] If the first suction assembly 6 and the second suction assembly 7 are used simultaneously, the first vacuum generator 3 and the second vacuum generator 4 need to be activated simultaneously. When a suction assembly is stopped, but its corresponding liquid tank still has spare capacity, the still-in-use suction assembly can be connected to the liquid tank through the switching valve 5 to make full use of the liquid tank's capacity.

[0044] It should be noted that this embodiment uses two liquid tanks as an example. Designers can also set up more than two liquid tanks based on the above switching principle, such as three or four liquid tanks interconnected, and switch them through the corresponding number of switching valves.

[0045] Example 2 Combination Figure 2 , 4As shown in Figures 5 and 8, a second embodiment of the present invention provides a medical waste collection device, including a first liquid tank 1, a second liquid tank 2, a first vacuum generator 3, a second vacuum generator 4, a switching valve 5, and a first suction assembly 6. The first vacuum generator 3 is connected to the top of the first liquid tank 1 to generate negative pressure on the first liquid tank 1; the second vacuum generator 4 is connected to the top of the second liquid tank 2 to generate negative pressure on the second liquid tank 2; the switching valve 5 is provided with a first inlet 51, a first outlet 52, and a second outlet 53; the first suction assembly 6 is connected to the first inlet 51 through a first inlet pipe 61, the first outlet 52 is connected to the first liquid tank 1 through a first outlet pipe 521, and the second outlet 53 is connected to the second liquid tank 2 through a second outlet pipe 531; the switching valve 5 can switch between a state where the first inlet 51 is connected to the first outlet 52 and a state where the first outlet 52 is connected to the second outlet 53.

[0046] The above structure allows for the simultaneous use of two consumable boxes, enabling the simultaneous use of the first liquid tank 1 and the second liquid tank 2; alternatively, it allows for the use of a single consumable box, with the first liquid tank 1 and the second liquid tank 2 connected in series to meet varying liquid tank capacity requirements in different situations. Furthermore, this structure ensures that the first liquid tank 1 and the second liquid tank 2 maintain approximately the same negative pressure, reducing switching time. Switching can be completed instantaneously, with minimal impact on the negative pressure at the suction end, thus not interfering with continuous surgical procedures by medical personnel.

[0047] The first suction component 6 includes a consumable box mounting base 62, a suction consumable box 63, and a suction tube 64. The suction consumable box 63 is disposed on the consumable box mounting base 62, and the suction tube 64 is connected to the suction consumable box 63.

[0048] Depending on the application requirements, a second suction assembly 7 may also be included. The switching valve 5 is further provided with a second liquid inlet 54. The second suction assembly 7 is connected to the second liquid inlet 54 through a second liquid inlet pipe 71. The switching valve 5 can control the connection between the first liquid inlet 51 and the first liquid outlet 52, and between the second liquid inlet 54 and the second liquid outlet 53, or between the first liquid inlet 51 and the second liquid outlet 53, and between the second liquid inlet 54 and the first liquid outlet 52. The structure of the second suction assembly 7 is the same as that of the first suction assembly 6.

[0049] It should be noted that the operator can establish a connection between the patient and the first liquid tank 1 through the first suction component 6; when the second suction component 7 is installed, the first suction component 6 and the second suction component 7 can work simultaneously to achieve suction function for two parts. In this embodiment, the second suction component 7 can be pre-set or temporarily installed as needed before use, saving usage costs.

[0050] Preferably, the switching valve 5 includes a first three-way valve 56, a second three-way valve 57, a first three-way connector 58, and a second three-way connector 59. The first three-way valve 56 has a first three-way inlet 561, a first three-way outlet 562, and a second three-way outlet 563. The second three-way valve 57 has a second three-way inlet 571, a third three-way outlet 572, and a fourth three-way outlet 573. The first three-way connector 58 includes a first connector inlet 581, a second connector inlet 582, and a first connector outlet 583. The second three-way connector 59 has a third connector inlet 591, a fourth connector inlet 592, and a third connector outlet 593. The second connector outlet is 593; the first three-way inlet 561 is connected to the first liquid inlet 51, the second three-way inlet 571 is connected to the second liquid inlet 54, the first connector outlet 583 is connected to the first liquid outlet 52, and the second connector outlet 593 is connected to the second liquid outlet 53; the first three-way outlet 562 is connected to the first connector inlet 581, the second three-way outlet 563 is connected to the third connector inlet 591, the third three-way outlet 572 is connected to the second connector inlet 582, and the fourth three-way outlet 573 is connected to the fourth connector inlet 592. The switching valve 5 also includes a first three-way actuator and a second three-way actuator. The first three-way actuator is used to control the first three-way inlet to switch between the first three-way outlet and the second three-way outlet; the second three-way actuator is used to control the second three-way inlet to switch between the third three-way outlet and the fourth three-way outlet. The first three-way valve 56 and the second three-way valve 57 can be conventional electromagnetic three-way valves. In this case, the first three-way actuator and the second three-way actuator can be electromagnets used to control the movement of the valve core in the valve body, which can connect two specific ports.

[0051] It should be noted that the switching valve 5 in this embodiment consists of two three-way valves and two three-way connectors. The three-way valves enable different connection combinations between the first suction assembly 6, the second suction assembly 7 and the first liquid tank 1 and the second liquid tank 2. Compared with the first embodiment, its adjustment is more flexible. In addition to realizing all the combinations of the first embodiment, the first suction assembly 6 or the second suction assembly 7 can also be connected to the first liquid tank 1 and the second liquid tank 2 at the same time.

[0052] To avoid the impact of vertically connected liquid tanks on the accuracy of the liquid level sensors, the first liquid tank 1 and the second liquid tank 2 are placed side by side at the same height. The first liquid tank 1 and the second liquid tank 2 are respectively equipped with a first liquid level sensor 81 and a second liquid level sensor 82. In this embodiment, the first liquid tank 1 and the second liquid tank 2 are placed side by side, and the switching of their suction channels is achieved through a switching valve 5 located above them. Regardless of the state of the switching valve 5, it will not affect the measurement of the liquid level sensors, solving the problem that existing liquid tanks need to be pumped in a certain amount of liquid before use. This makes operation simpler and shortens the equipment maintenance time. Since the first liquid tank 1 and the second liquid tank 2 are placed side by side at the same height, the bottoms of the first liquid tank 1 and the second liquid tank 2 can be set to flat bottoms, further reducing the influence of the tank bottom shape on the liquid level measurement. Preferably, the medical waste collection device also includes a control unit 10, which is used to control the operation of the switching valve 5 according to the liquid level values ​​of the first liquid level sensor 81 and the second liquid level sensor 82. Specifically, when only one suction component is in use, assuming the first suction component 6, when the liquid level in the first liquid tank 1 reaches a preset value and there is remaining volume in the second liquid tank 2, the switching can be triggered.

[0053] Preferably, the first vacuum generator 3 and the second vacuum generator 4 are respectively connected to a first proportional valve 91 and a second proportional valve 92, and both the first proportional valve 91 and the second proportional valve 92 are connected to the control unit 10. Both the first vacuum generator 3 and the second vacuum generator 4 can be vacuum pumps. When the first suction assembly 6 or the second suction assembly 7 is connected to a liquid tank, the control unit 10 controls the pressure inside the first liquid tank 1 through the first proportional valve 91 and the first vacuum generator 3; when the first suction assembly 6 or the second suction assembly 7 is connected to the second liquid tank 2, the control unit 10 controls the pressure inside the second liquid tank 2 through the second proportional valve 92 and the second vacuum generator 4.

[0054] The working principle of this embodiment is as follows: First, depending on the needs of the suction application, choose to use the first suction component 6 alone or install the second suction component 7 for simultaneous use.

[0055] If the first suction assembly 6 is used alone, the switching valve 5 is adjusted before suction to ensure that the second three-way valve 57 cuts off the second three-way inlet 571 from the third three-way outlet 572 and the fourth three-way outlet 573. The first three-way valve 56 connects the first three-way inlet 561 to one of the first three-way outlets 562 and 563, or connects both simultaneously, allowing the first suction assembly 6 to connect to either the first liquid tank 1 or the second liquid tank 2, or both simultaneously. If the first suction assembly 6 is connected to the first liquid tank 1, the negative pressure of the first liquid tank 1 can be used to suction the patient's medical waste. When the level sensor 8 detects that the first liquid tank 1 has reached a certain height, it can send a signal to the first three-way valve 56 to connect the first inlet 561 to the second outlet 563, i.e., the first suction assembly 6 is connected to the second liquid tank 2, and suction continues through the negative pressure of the second liquid tank 2. In this embodiment, the control unit 10 sends a control signal to the switching valve 5 based on the liquid level signals from the first liquid level sensor 81 and the second liquid level sensor 82. When a switching signal is received, the first three-way actuator controls the first three-way inlet 561 to switch between the first three-way outlet 562 and the second three-way outlet 563; the second three-way actuator controls the second three-way inlet 571 to switch between the third three-way outlet 572 and the fourth three-way outlet 573. To establish negative pressure in the second liquid tank 2 in advance, a preliminary liquid level height can be set in the first liquid tank 1 and the second liquid tank 2. When the first liquid tank 1 or the second liquid tank 2 reaches the preliminary liquid level height, the vacuum generator of the other liquid tank is turned on so that the liquid tank forms the same negative pressure as the other liquid tank in use before switching.

[0056] If the first suction component 6 and the second suction component 7 are used simultaneously, the first vacuum generator 3 and the second vacuum generator 4 need to be started simultaneously. When a suction component is stopped, but its corresponding liquid tank still has excess capacity, the still-in-use suction component can be connected to the liquid tank through the switching valve 5 to make full use of the liquid tank's capacity.

[0057] It should be noted that this embodiment uses two liquid tanks as an example. Designers can also set up more than two liquid tanks based on the above switching principle, such as three or four liquid tanks interconnected, and switch them through the corresponding number of switching valves.

[0058] Example 3 Combination Figure 2 , 4As shown in Figures 5 and 9, the third embodiment of the present invention provides a medical waste collection device, including a first liquid tank 1, a second liquid tank 2, a first vacuum generator 3, a second vacuum generator 4, a switching valve 5, and a first suction assembly 6. The first vacuum generator 3 is connected to the top of the first liquid tank 1 to generate negative pressure on the first liquid tank 1; the second vacuum generator 4 is connected to the top of the second liquid tank 2 to generate negative pressure on the second liquid tank 2; the switching valve 5 is provided with a first inlet 51, a first outlet 52, and a second outlet 53; the first suction assembly 6 is connected to the first inlet 51 through a first inlet pipe 61, the first outlet 52 is connected to the first liquid tank 1 through a first outlet pipe 521, and the second outlet 53 is connected to the second liquid tank 2 through a second outlet pipe 531; the switching valve 5 can switch between a state where the first inlet 51 is connected to the first outlet 52 and a state where the first outlet 52 is connected to the second outlet 53.

[0059] The above structure allows for the simultaneous use of two consumable boxes, enabling the simultaneous use of the first liquid tank 1 and the second liquid tank 2; alternatively, it allows for the use of a single consumable box, with the first liquid tank 1 and the second liquid tank 2 connected in series to meet varying liquid tank capacity requirements in different situations. Furthermore, this structure ensures that the first liquid tank 1 and the second liquid tank 2 maintain approximately the same negative pressure, reducing switching time. Switching can be completed instantaneously, with minimal impact on the negative pressure at the suction end, thus not interfering with continuous surgical procedures by medical personnel.

[0060] The first suction component 6 includes a consumable box mounting base 62, a suction consumable box 63, and a suction tube 64. The suction consumable box 63 is disposed on the consumable box mounting base 62, and the suction tube 64 is connected to the suction consumable box 63.

[0061] Depending on the application requirements, a second suction assembly 7 may also be included. The switching valve 5 is further provided with a second liquid inlet 54. The second suction assembly 7 is connected to the second liquid inlet 54 through a second liquid inlet pipe 71. The switching valve 5 can control the connection between the first liquid inlet 51 and the first liquid outlet 52, and between the second liquid inlet 54 and the second liquid outlet 53, or between the first liquid inlet 51 and the second liquid outlet 53, and between the second liquid inlet 54 and the first liquid outlet 52. The structure of the second suction assembly 7 is the same as that of the first suction assembly 6.

[0062] It should be noted that the operator can establish a connection between the patient and the first liquid tank 1 through the first suction component 6; when the second suction component 7 is installed, the first suction component 6 and the second suction component 7 can work simultaneously to achieve suction function for two parts. In this embodiment, the second suction component 7 can be pre-set or temporarily installed as needed before use, saving usage costs.

[0063] Preferably, the switching valve 5 includes a first three-way connector 66, a second three-way connector 67, a third three-way connector 68, and a fourth three-way connector 69. The first three-way connector 66 has a first three-way inlet 661, a first three-way outlet 662, and a second three-way outlet 663. The second three-way connector 67 has a second three-way inlet 671, a third three-way outlet 672, and a fourth three-way outlet 673. The third three-way connector 68 includes a first connector inlet 681, a second connector inlet 682, and a first connector outlet 683. The fourth three-way connector 69 has a third connector inlet 691 and a fourth connector outlet 692. 2. The first three-way connector 66 and the second three-way connector 67 are connected to the first liquid inlet 51, the second three-way connector 671 is connected to the second liquid inlet 54, the first connector outlet 683 is connected to the first liquid outlet 52, and the second connector outlet 693 is connected to the second liquid outlet 53; the first three-way connector outlet 662 is connected to the first connector inlet 681, the second three-way connector outlet 663 is connected to the third connector inlet 691, the third three-way connector outlet 672 is connected to the second connector inlet 682, and the fourth three-way connector outlet 673 is connected to the fourth connector inlet 692. The first three-way connector 66 and the second three-way connector 67 have the same structure. In order to realize the on / off control of the outlet, the outlet end of the first three-way connector 66 is composed of a first two-way valve 664 and a second two-way valve 665. The first two-way valve 664 is used to control the on / off of the first three-way outlet 662, and the second two-way valve 665 is used to control the on / off of the second three-way outlet 663. The outlet end of the second three-way connector 67 is composed of a third two-way valve 674 and a fourth two-way valve 675. The third two-way valve 674 is used to control the opening and closing of the third three-way outlet 672, and the fourth two-way valve 675 is used to control the opening and closing of the fourth three-way outlet 673.

[0064] It should be noted that the switching valve 5 in this embodiment consists of four three-way connectors and four two-way solenoid valves. The two-way solenoid valves enable different connection combinations between the first suction assembly 6, the second suction assembly 7, and the first liquid tank 1 and the second liquid tank 2. Compared to the first embodiment, its adjustment is more flexible. Besides achieving all the combinations of the first embodiment, it can also connect either the first suction assembly 6 or the second suction assembly 7 simultaneously to the first liquid tank 1 and the second liquid tank 2. Furthermore, the two three-way valves mentioned above are composed of ordinary three-way connectors with two-way solenoid valves installed at their two outlets. The two-way solenoid valves control the opening and closing of the corresponding outlets, realizing the function of a three-way valve. Compared to ordinary three-way valves that switch between different inlets and outlets through the movement of the internal valve core, the valve body structure of this embodiment offers more flexible control, enabling the control of opening or closing a single outlet of a single three-way connector, or opening or closing both outlets simultaneously. To avoid the impact of vertically connected liquid tanks on the accuracy of the liquid level sensors, the first liquid tank 1 and the second liquid tank 2 are placed side by side at the same height. The first liquid tank 1 and the second liquid tank 2 are respectively equipped with a first liquid level sensor 81 and a second liquid level sensor 82. In this embodiment, the first liquid tank 1 and the second liquid tank 2 are placed side by side, and the switching of their suction channels is achieved through a switching valve 5 located above them. Regardless of the state of the switching valve 5, it will not affect the measurement of the liquid level sensor 8, solving the problem that a certain amount of liquid needs to be pumped into the existing liquid tanks before use. This makes operation simpler and shortens the equipment maintenance time. Since the first liquid tank 1 and the second liquid tank 2 are placed side by side at the same height, the bottoms of the first liquid tank 1 and the second liquid tank 2 can be set to flat bottoms, further reducing the influence of the tank bottom shape on the liquid level measurement. Preferably, the medical waste collection device also includes a control unit 10, which is used to control the operation of the switching valve 5 according to the liquid level values ​​of the first liquid level sensor 81 and the second liquid level sensor 82.

[0065] Preferably, the first vacuum generator 3 and the second vacuum generator 4 are respectively connected to a first proportional valve 91 and a second proportional valve 92, and both the first proportional valve 91 and the second proportional valve 92 are connected to the control unit 10. Both the first vacuum generator 3 and the second vacuum generator 4 can be vacuum pumps. When the first suction assembly 6 or the second suction assembly 7 is connected to a liquid tank, the control unit 10 controls the pressure inside the first liquid tank 1 through the first proportional valve 91 and the first vacuum generator 3; when the first suction assembly 6 or the second suction assembly 7 is connected to the second liquid tank 2, the control unit 10 controls the pressure inside the second liquid tank 2 through the second proportional valve 92 and the second vacuum generator 4.

[0066] The working principle of this embodiment is as follows: First, depending on the needs of the suction application, choose to use the first suction component 6 alone or install the second suction component 7 for simultaneous use.

[0067] If the first suction assembly 6 is used alone, adjust the switching valve 5 before suction, closing all two-way valves to ensure that the second three-way connector 67 disconnects the second three-way inlet 671 from the third three-way outlet 672 and the fourth three-way outlet 673. Then, open the first two-way valve 664 or the second two-way valve 665 on the first three-way connector 66, connecting the first three-way inlet 661 to one of the first three-way outlets 662 and 663 via the first three-way connector 66. Alternatively, simultaneously open the first two-way valve 664 and the second two-way valve 665 to connect the first three-way outlet 662 and 663 simultaneously. This allows the first suction assembly 6 to connect to one of the first liquid tank 1 or the second liquid tank 2, or both simultaneously. If the first suction assembly 6 is connected to the first liquid tank 1, the patient's medical waste can be suctioned out by the negative pressure of the first liquid tank 1. When the first liquid level sensor 81 detects that the first liquid tank 1 has reached a certain height, it can send a switching signal to the first three-way connector 66. When the switching signal is received, the connection status of the first liquid inlet 51 and the second liquid inlet 54 is switched between the first liquid outlet 52 and the second liquid outlet 53 by the on / off control of the first two-way valve 664, the second two-way valve 665, the third two-way valve 674 and the fourth two-way valve 675. The second liquid outlet 53 is opened by the second two-way valve 665 or the fourth two-way valve 675, and the first two-way valve 664 and the third two-way valve 674 are closed, that is, the first suction assembly 6 is connected to the second liquid tank 2, and the suction operation continues by the negative pressure of the second liquid tank 2. In order to establish negative pressure in advance for the second liquid tank 2, a preliminary liquid level height can be set in the first liquid tank 1 and the second liquid tank 2. When the first liquid tank 1 or the second liquid tank 2 reaches the preliminary liquid level height, the vacuum generator of the other liquid tank is turned on so that the liquid tank forms the same negative pressure as the other liquid tank in use before switching.

[0068] If the first suction component 6 and the second suction component 7 are used simultaneously, the first vacuum generator 3 and the second vacuum generator 4 need to be started simultaneously. When a suction component is stopped, but its corresponding liquid tank still has excess capacity, the still-in-use suction component can be connected to the liquid tank through the switching valve 5 to make full use of the liquid tank's capacity.

[0069] It should be noted that this embodiment uses two liquid tanks as an example. Designers can also set up more than two liquid tanks based on the above switching principle, such as three or four liquid tanks interconnected, and switch them through the corresponding number of switching valves.

[0070] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A medical waste collection device, characterized in that, It includes a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve, a first suction assembly, and a second suction assembly; The first vacuum generator is connected to the top of the first liquid tank to generate negative pressure on the first liquid tank; The second vacuum generator is connected to the top of the second liquid tank and is used to generate negative pressure on the second liquid tank; The switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet. The first suction component is connected to the first liquid inlet through a first liquid inlet pipe. The first liquid outlet is connected to the first liquid tank through a first liquid outlet pipe. The second liquid outlet is connected to the second liquid tank through a second liquid outlet pipe. The switching valve can switch between a state where the first inlet is connected to the first outlet and a state where the first outlet is connected to the second outlet. The switching valve is further provided with a second liquid inlet, and the second suction component is connected to the second liquid inlet through a second liquid inlet pipe; the switching valve can control the first liquid inlet to be connected to the first liquid outlet, the second liquid inlet to be connected to the second liquid outlet, or the first liquid inlet to be connected to the second liquid outlet, and the second liquid inlet to be connected to the first liquid outlet. The switching valve includes a first three-way valve and a second three-way valve; the first three-way valve has a first three-way inlet, a first three-way outlet, and a second three-way outlet, and the second three-way valve has a second three-way inlet, a third three-way outlet, and a fourth three-way outlet; wherein, the first three-way outlet and the third three-way outlet are connected to the first liquid tank; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank; the first three-way inlet is connected to the first liquid inlet, and the second three-way inlet is connected to the second liquid inlet; The first three-way outlet and the third three-way outlet are connected to the first liquid tank via a first three-way connector; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank via a second three-way connector. The first three-way connector includes a first connector inlet, a second connector inlet, and a first connector outlet; the second three-way connector has a third connector inlet, a fourth connector inlet, and a second connector outlet; the first three-way connector inlet is connected to the first liquid inlet, the second three-way connector inlet is connected to the second liquid inlet, the first connector outlet is connected to the first liquid outlet, and the second connector outlet is connected to the second liquid outlet; the first three-way connector outlet is connected to the first connector inlet, the second three-way connector outlet is connected to the third connector inlet, the third three-way connector outlet is connected to the second connector inlet, and the fourth three-way connector outlet is connected to the fourth connector inlet.

2. The medical waste collection device as described in claim 1, characterized in that, The first suction assembly includes a consumable box mounting base, a suction consumable box, and a suction tube. The suction consumable box is disposed on the consumable box mounting base, and the suction tube is connected to the suction consumable box.

3. The medical waste collection device as described in claim 1, characterized in that, The structure of the second suction component is the same as that of the first suction component.

4. The medical waste collection device as described in claim 1, characterized in that, The switching valve further includes a first three-way actuator and a second three-way actuator. The first three-way actuator is used to control the first three-way inlet to switch between the first three-way outlet and the second three-way outlet. The second three-way actuator is used to control the second three-way inlet to switch between the third three-way outlet and the fourth three-way outlet.

5. The medical waste collection device as described in claim 1, characterized in that, The first liquid tank and the second liquid tank are placed side by side at the same height, and the first liquid tank and the second liquid tank are respectively equipped with a first liquid level sensor and a second liquid level sensor.

6. The medical waste collection device as described in claim 5, characterized in that, It also includes a control unit, which is used to control the switching valve to operate based on the liquid level values ​​of the first liquid level sensor and the second liquid level sensor.

7. The medical waste collection device as described in claim 6, characterized in that, The first vacuum generator and the second vacuum generator are respectively connected to a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are connected to the control unit; when the first suction assembly or the second suction assembly is connected to a liquid tank, the control unit controls the pressure in the first liquid tank through the first proportional valve and the first vacuum generator; when the first suction assembly or the second suction assembly is connected to the second liquid tank, the control unit controls the pressure in the second liquid tank through the second proportional valve and the second vacuum generator.

8. A medical waste collection device, characterized in that, It includes a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve, a first suction assembly, and a second suction assembly; The first vacuum generator is connected to the top of the first liquid tank to generate negative pressure on the first liquid tank; The second vacuum generator is connected to the top of the second liquid tank and is used to generate negative pressure on the second liquid tank; The switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet. The first suction component is connected to the first liquid inlet through a first liquid inlet pipe. The first liquid outlet is connected to the first liquid tank through a first liquid outlet pipe. The second liquid outlet is connected to the second liquid tank through a second liquid outlet pipe. The switching valve can switch between a state where the first inlet is connected to the first outlet and a state where the first outlet is connected to the second outlet. The switching valve is further provided with a second liquid inlet, and the second suction component is connected to the second liquid inlet through a second liquid inlet pipe; the switching valve can control the first liquid inlet to be connected to the first liquid outlet, the second liquid inlet to be connected to the second liquid outlet, or the first liquid inlet to be connected to the second liquid outlet, and the second liquid inlet to be connected to the first liquid outlet. The switching valve includes a first three-way connector, a second three-way connector, a third three-way connector, and a fourth three-way connector. The first three-way connector has a first three-way inlet, a first three-way outlet, and a second three-way outlet. The second three-way connector has a second three-way inlet, a third three-way outlet, and a fourth three-way outlet. The third three-way connector includes a first connector inlet, a second connector inlet, and a first connector outlet. The fourth three-way connector has a third connector inlet, a fourth connector inlet, and a second connector outlet. The first three-way inlet is connected to the first liquid inlet, the second three-way inlet is connected to the second liquid inlet, the first connector outlet is connected to the first liquid outlet, and the second connector outlet is connected to the second liquid outlet. The first three-way outlet is connected to the first connector inlet, the second three-way outlet is connected to the third connector inlet, the third three-way outlet is connected to the second connector inlet, and the fourth three-way outlet is connected to the fourth connector inlet. The outlet end of the first three-way connector is composed of a first two-way valve and a second two-way valve. The first two-way valve is used to control the opening and closing of the first three-way outlet, and the second two-way valve is used to control the opening and closing of the second three-way outlet. The outlet end of the second three-way connector is composed of a third two-way valve and a fourth two-way valve. The third two-way valve is used to control the opening and closing of the third three-way outlet, and the fourth two-way valve is used to control the opening and closing of the fourth three-way outlet.

9. The medical waste collection device as described in claim 8, characterized in that, The first liquid tank and the second liquid tank are placed side by side at the same height, and the first liquid tank and the second liquid tank are respectively equipped with a first liquid level sensor and a second liquid level sensor.

10. The medical waste collection device as described in claim 9, characterized in that, It also includes a control unit, which is used to control the switching valve to operate based on the liquid level values ​​of the first liquid level sensor and the second liquid level sensor.

11. The medical waste collection device as described in claim 10, characterized in that, The first vacuum generator and the second vacuum generator are respectively connected to a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are connected to the control unit; when the first suction assembly or the second suction assembly is connected to a liquid tank, the control unit controls the pressure in the first liquid tank through the first proportional valve and the first vacuum generator; when the first suction assembly or the second suction assembly is connected to the second liquid tank, the control unit controls the pressure in the second liquid tank through the second proportional valve and the second vacuum generator.

12. A control method for a medical waste collection device, characterized in that, The medical waste collection equipment includes a first liquid tank, a second liquid tank, a first vacuum generator, a second vacuum generator, a switching valve, and a first suction assembly. The first vacuum generator is connected to the top of the first liquid tank to generate negative pressure on the first liquid tank; The second vacuum generator is connected to the top of the second liquid tank and is used to generate negative pressure on the second liquid tank; The switching valve is provided with a first liquid inlet, a first liquid outlet and a second liquid outlet. The first suction component is connected to the first liquid inlet through a first liquid inlet pipe. The first liquid outlet is connected to the first liquid tank through a first liquid outlet pipe. The second liquid outlet is connected to the second liquid tank through a second liquid outlet pipe. When it is necessary to switch the connection state of the first liquid inlet between the first liquid outlet and the second liquid outlet, a control signal is sent to the switching valve. The medical waste collection device also includes a second suction component, and the switching valve is further provided with a second liquid inlet. The second suction component is connected to the second liquid inlet through a second liquid inlet pipe. When it is necessary to switch the connection state between the first liquid inlet and the second liquid inlet between the first liquid outlet and the second liquid outlet, a control signal is sent to the switching valve. The switching valve includes a first three-way valve and a second three-way valve; the first three-way valve has a first three-way inlet, a first three-way outlet, and a second three-way outlet, and the second three-way valve has a second three-way inlet, a third three-way outlet, and a fourth three-way outlet; wherein, the first three-way outlet and the third three-way outlet are connected to the first liquid tank; the second three-way outlet and the fourth three-way outlet are connected to the second liquid tank; the first three-way inlet is connected to the first liquid inlet, and the second three-way inlet is connected to the second liquid inlet; When a switching signal is received, the first three-way actuator controls the first three-way inlet to switch between the first three-way outlet and the second three-way outlet; the second three-way actuator controls the second three-way inlet to switch between the third three-way outlet and the fourth three-way outlet.

13. The control method for the medical waste collection equipment as described in claim 12, characterized in that, It also includes a control unit; the first liquid tank and the second liquid tank are placed side by side at the same height, and the first liquid tank and the second liquid tank are respectively provided with a first liquid level sensor and a second liquid level sensor; the control unit sends a control signal to the switching valve according to the liquid level signals of the first liquid level sensor and the second liquid level sensor.

14. The control method for the medical waste collection equipment as described in claim 13, characterized in that, The first vacuum generator and the second vacuum generator are respectively connected to a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are connected to the control unit; when the first suction assembly or the second suction assembly is connected to a liquid tank, the control unit controls the pressure in the first liquid tank through the first proportional valve and the first vacuum generator; when the first suction assembly or the second suction assembly is connected to the second liquid tank, the control unit controls the pressure in the second liquid tank through the second proportional valve and the second vacuum generator.

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