Ultrasonic cleaning device and analyzer

Abstract

The utility model is applicable to the technical field of medical equipment, and provides an ultrasonic cleaning device and an analyser, the ultrasonic cleaning device comprises a main shell and a cleaning cabin, one end of the cleaning cabin is provided with a needle inlet for inserting a needle, the other end of the cleaning cabin is connected with the main shell, and an inner cavity of the cleaning cabin is communicated with the needle inlet and an inner cavity of the main shell; an ultrasonic transducer is arranged on the main shell, and a vibration starting part of the ultrasonic transducer is located on a communicating passage of the inner cavity of the cleaning cabin and the inner cavity of the main shell; an ultrasonic cleaning position is arranged in an inner cavity of the cleaning cabin; the ultrasonic cleaning position and the vibration starting part of the ultrasonic transducer are arranged in a staggered mode in the vertical direction. The vibration starting part of the ultrasonic transducer can be in direct contact with liquid, the ultrasonic cleaning effect is good, meanwhile, the ultrasonic cleaning position and the vibration starting part of the ultrasonic transducer are arranged in a staggered mode in the vertical direction, the inner wall of the sampling needle can be washed in the cleaning bin, the cleaning efficiency is high, and the cleaning effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to an ultrasonic cleaning device and an analyzer. Background Art

[0002] An analyzer is an instrument used to test samples. During the testing process, the sample needs to be transferred from the sample tube to the reaction tube through a sampling needle. The sampling needle is contaminated by the sample when transferring the sample, and needs to be cleaned with a cleaning device.

[0003] Ultrasonic cleaning devices are a commonly used cleaning device. In existing ultrasonic cleaning devices, if high-pressure water is used to clean the inner wall while ultrasonic cleaning is performed in the cleaning chamber, the high-pressure water sprayed from the sampling needle will damage the ultrasonic transducer. Therefore, the sampling needle needs to be first cleaned with ultrasonic cleaning on the outer wall of the sampling needle in the cleaning chamber, and then transferred to the drain position of the main shell, and the inner wall of the sampling needle is cleaned with high-pressure water. The two cleaning methods need to be performed successively, the cleaning time is long, and the cleaning effect is poor. Utility Model Content

[0004] The utility model provides an ultrasonic device, aiming to solve the problem in the existing ultrasonic cleaning device that ultrasonic cleaning and inner wall cleaning are performed sequentially, the cleaning time is long and the cleaning effect is poor.

[0005] The utility model is implemented as follows: an ultrasonic cleaning device comprising:

[0006] A main shell and a cleaning chamber, wherein one end of the cleaning chamber is provided with a needle insertion port for inserting a needle, and the other end is connected to the main shell, and the inner cavity of the cleaning chamber communicates with the needle insertion port and the inner cavity of the main shell;

[0007] An ultrasonic transducer is arranged on the main shell, and a vibration-generating portion of the ultrasonic transducer is located on a communication passage between the inner cavity of the cleaning cabin and the inner cavity of the main shell;

[0008] The inner cavity of the cleaning cabin is provided with an ultrasonic cleaning position;

[0009] The ultrasonic cleaning position and the vibration-generating portion of the ultrasonic transducer are staggered in the vertical direction.

[0010] Optionally, the distance between the cleaning position and the bottom of the inner cavity of the main shell is greater than or equal to 20 mm.

[0011] Optionally, a horizontal distance between the vibration-generating part of the ultrasonic transducer and the cleaning position is greater than or equal to 3 mm.

[0012] Optionally, a liquid discharge port and a liquid inlet connected to the inner cavity of the main shell are respectively provided on the main shell, and the liquid discharge port is connected to the bottom of the inner cavity of the main shell.

[0013] Optionally, a ring wall surrounding the cleaning chamber extends from the main shell to form a waste liquid tank;

[0014] The shell is also provided with a waste liquid port connected to the waste liquid tank.

[0015] Optionally, the distance between the cleaning position and the bottom of the inner cavity of the main housing is positively correlated with the pressure of the inner wall flushing, specifically:

[0016] P=A×L

[0017] Wherein, P is the pressure of inner wall flushing;

[0018] L is the distance between the cleaning position and the bottom of the inner cavity of the main housing;

[0019]

[0020] Where, ρ is the density of cleaning water;

[0021] S is the cross-sectional area of ​​the sampling needle outlet;

[0022] v0 is the speed of the cleaning water flowing out of the sampling needle;

[0023] v1 is the speed at which the cleaning water impacts the bottom of the inner cavity of the main housing;

[0024] Δt is the time from when the cleaning water flows out from the sampling needle to when it hits the bottom of the inner cavity of the main shell.

[0025] The utility model also provides an analyzer, comprising a sampling needle and the ultrasonic cleaning device, wherein the sampling needle is connected to a switch valve and a power pump.

[0026] The beneficial effect achieved by the utility model is that the vibration-starting part of the ultrasonic transducer is arranged on the connecting passage between the inner cavity of the cleaning cabin and the inner cavity of the main shell, so that the vibration-starting part of the ultrasonic transducer is immersed in the cleaning medium, and the ultrasonic cleaning effect is good. At the same time, the ultrasonic cleaning position and the vibration-starting part of the ultrasonic transducer are arranged in a vertically staggered manner to prevent the liquid discharged from the sampling end of the sampling needle from directly impacting the vibration-starting part of the ultrasonic transducer, so that the sampling needle can be used to wash the inner wall in the cleaning cabin without transferring the sampling needle, the cleaning efficiency is high, and the ultrasonic cleaning and inner wall washing can be carried out simultaneously, and the cleaning effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the ultrasonic cleaning device provided by the utility model;

[0028] Figure 2 This is a cross-sectional view of the internal structure of the ultrasonic cleaning device provided by the utility model;

[0029] Figure 3 This is another cross-sectional view of the internal structure of the ultrasonic cleaning device provided by the utility model;

[0030] Figure 4 It is a schematic diagram of the liquid circuit connection of the analyzer provided by the utility model;

[0031] Figure 5 It is a disassembly schematic diagram of another ultrasonic cleaning device provided by the utility model.

[0032] Description of reference numerals:

[0033] 100, ultrasonic cleaning device; 101, main housing; 1011, surrounding wall; 1012, inner cavity of main housing; 102, cleaning chamber; 1021, needle inlet; 1022, inner cavity of cleaning chamber; 103, ultrasonic transducer; 1031, vibration-generating part; 104, liquid discharge port; 105, liquid inlet; 106, waste liquid tank; 107, waste liquid port;

[0034] 200. Analyzer; 201. Sampling needle; 202. Switch valve; 203. Power pump; 204. Cleaning pool. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0039] In the utility model, since the vibration-starting part of the ultrasonic transducer is arranged on the connecting passage between the inner cavity of the cleaning cabin and the inner cavity of the main shell, the vibration-starting part of the ultrasonic transducer is immersed in the cleaning medium, and the ultrasonic cleaning effect is good. At the same time, the ultrasonic cleaning position and the vibration-starting part of the ultrasonic transducer are arranged in a vertically staggered manner to prevent the liquid discharged from the sampling end of the sampling needle from directly impacting the vibration-starting part of the ultrasonic transducer, so that the sampling needle can be used to wash the inner wall in the cleaning cabin without transferring the sampling needle, the cleaning efficiency is high, and the ultrasonic cleaning and inner wall washing can be carried out simultaneously, and the cleaning effect is good.

[0040] Embodiment 1

[0041] like Figures 1 to 3 as well as Figure 5 As shown, this embodiment provides an ultrasonic cleaning device 100, comprising:

[0042] The main housing 101 and the cleaning chamber 102, one end of the cleaning chamber 102 is provided with a needle inlet 1021 for inserting a needle, and the other end is connected to the main housing 101, and the inner cavity 1022 of the cleaning chamber communicates with the needle inlet 1021 and the inner cavity 1012 of the main housing;

[0043] The main housing 101 is provided with an ultrasonic transducer 103, and a vibration-generating portion 1031 of the ultrasonic transducer 103 is located on a communication path between the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main housing;

[0044] The inner cavity 1022 of the cleaning chamber is provided with an ultrasonic cleaning position;

[0045] The ultrasonic cleaning position and the vibration-generating portion 1031 of the ultrasonic transducer 103 are staggered in the vertical direction.

[0046] The ultrasonic transducer 103 is a device that converts electromagnetic energy into mechanical energy (acoustic energy), and is usually made of piezoelectric ceramics or other magnetostrictive materials. The piezoelectric effect of the material converts electrical signals into mechanical vibrations. The ultrasonic transducer 103 can be used for ultrasonic cleaning, and the ultrasonic waves generated by the ultrasonic transducer 103 directly or indirectly act on the liquid and dirt through the cavitation effect, acceleration effect, and straight flow effect in the liquid, so that the dirt layer is dispersed, emulsified, and peeled off to achieve the cleaning purpose.

[0047] The needle inlet 1021, the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main housing are connected, and the main housing 101 is provided with an ultrasonic transducer 103, and the vibration-initiating portion 1031 of the ultrasonic transducer 103 is located on the communication path between the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main housing. When the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main housing are both filled with liquid, the vibration-initiating portion 1031 of the ultrasonic transducer 103 is immersed in the liquid, and when the ultrasonic transducer 103 is working, cavitation is generated on the liquid in the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main housing.

[0048] The sampling needle is used to collect samples or reagents. The sampling needle is a hollow needle tube. One end of the sampling needle is a connection end for connecting to the device, and the other end is a sampling end for contacting the sample or reagent. The device at the connection end can provide positive or negative pressure to the sampling needle, so that the sampling needle can collect or discharge the sample or reagent. The device can also provide a cleaning liquid to the sampling needle, and the cleaning liquid flows through the hollow needle tube to clean the inner wall of the needle tube.

[0049] The inner cavity 1022 of the cleaning chamber is provided with an ultrasonic cleaning position, which is the position where the sampling end of the sampling needle is located during cleaning. Specifically, the sampling needle can be made to reach the ultrasonic cleaning position by means of a positioning structure or path planning. The sampling needle enters the inner cavity 1022 of the cleaning chamber from the needle inlet 1021 at one end of the cleaning chamber 102 and reaches the ultrasonic cleaning position. When ultrasonic cleaning is performed, the liquid in the cleaning chamber 102 will immerse the sampling end of the sampling needle located at the ultrasonic cleaning position, and the ultrasonic transducer 103 is turned on, and the cavitation effect, acceleration effect and straight flow effect of ultrasonic waves in the liquid can be utilized to peel off the stains on the sampling needle from the sampling needle, thereby achieving the purpose of cleaning.

[0050] Usually, when cleaning the inner wall of the sampling needle 201, the device connected to the connection end injects a cleaning liquid into the needle tube from the connection end, and the cleaning liquid is discharged from the sampling end. The cleaning liquid can be cleaning water or a liquid containing a cleaning agent. In order to clean the inner wall of the sampling needle 201, a large hydraulic pressure is usually provided, and the inner wall of the sampling needle 201 is cleaned by the impact of the liquid. Therefore, the impact force of the liquid discharged from the sampling end of the sampling needle 201 is large.

[0051] The sampling needle is kept vertical, and the sampling end is located below the connection end, which is convenient for planning the moving path of the sampling needle and avoiding collision with other equipment. The ultrasonic cleaning position and the vibration-starting part 1031 of the ultrasonic transducer 103 are staggered in the vertical direction, that is, the projections of the sampling needle 201 located at the ultrasonic cleaning position and the vibration-starting part 1031 of the ultrasonic transducer 103 in the vertical direction do not overlap, so as to avoid the liquid discharged from the sampling end directly impacting the vibration-starting part 1031 of the ultrasonic transducer 103 when cleaning the inner wall of the sampling needle 201, thereby damaging the vibration-starting part 1031 of the ultrasonic transducer 103.

[0052] It can be understood that the "vertical direction" described in this embodiment refers to a vertical direction compared to the horizontal direction, and can be perpendicular to the horizontal direction, or have an inclination angle greater than 85° and less than 90° relative to the horizontal direction.

[0053] When in use, you can follow the steps below to clean:

[0054] S101, introducing a cleaning medium into the inner cavity 1022 of the cleaning chamber;

[0055] S102, controlling the sampling needle 201 to extend into the ultrasonic cleaning position;

[0056] S103, turning on the ultrasonic transducer 103, and starting the flushing of the inner wall of the sampling needle.

[0057] The order of step S101 and step S102 can be exchanged without affecting the implementation of the method.

[0058] In step S101, a cleaning medium is introduced into the inner cavity 1022 of the cleaning chamber. The cleaning medium is a liquid, which can be cleaning water (such as purified water, deionized water) or a cleaning liquid (a solution containing a cleaning agent), so that the cleaning medium fills the inner cavity 1022 of the cleaning chamber.

[0059] In step S102, the sampling needle 201 is controlled to extend into the cleaning chamber 102 and reach the cleaning position, and the part of the sampling needle 201 that needs to be cleaned is immersed below the liquid surface of the cleaning medium.

[0060] In step S103, the ultrasonic transducer 103 is turned on, and the vibration part 1031 of the ultrasonic transducer 103 emits ultrasonic waves. The cavitation, acceleration and straight flow of ultrasonic waves in the liquid directly and indirectly act on the liquid and the dirt on the sampling needle, so that the dirt layer on the sampling needle is dispersed, emulsified and peeled off, thereby achieving the purpose of cleaning. The inner wall flushing of the sampling needle is started, and the device connected to the connection end injects cleaning water into the needle tube from the connection end, and the cleaning water is discharged from the sampling end to clean the inner wall of the sampling needle 201.

[0061] The sampling needle 201 is ultrasonically cleaned and the inner wall is flushed in the cleaning chamber 102 at the same time, with high cleaning efficiency and good cleaning effect.

[0062] In some embodiments, if the ultrasonic cleaning device 100 described in Example 4 is used, the cleaning medium can be introduced into the cleaning chamber 102 through the liquid inlet 105 .

[0063] Steps S104 to S106 may also be added to the above-mentioned cleaning steps, and the specific steps are:

[0064] S101, introducing a cleaning medium into the inner cavity 1022 of the cleaning chamber;

[0065] S102, controlling the sampling needle 201 to extend into the cleaning chamber 102;

[0066] S103, turning on the ultrasonic transducer 103, and starting the flushing of the inner wall of the sampling needle;

[0067] S104, discharging the cleaning medium in the inner cavity 1022 of the cleaning chamber;

[0068] S105, introducing cleaning water into the inner cavity 1022 of the cleaning chamber, so that the cleaning water flows out from the needle inlet 1021;

[0069] S106, draining the cleaning water in the inner cavity 1012 of the main shell and the inner cavity 1022 of the cleaning chamber;

[0070] In step S104, the waste liquid in the cleaning chamber 102 is discharged. The cleaning medium and cleaning water originally introduced into the cleaning chamber 102 in steps S101 to 103 become waste liquid, and the waste liquid is discharged to separate the sampling needle from the waste liquid, thereby preventing the sampling needle 201 from being contaminated by the waste water.

[0071] In step S105, cleaning water is introduced into the cleaning chamber 102 so that the cleaning water flows out from the needle inlet 1021, and the cleaning water flushes the inner cavity 1022 of the cleaning chamber and the portion of the sampling needle placed in the cleaning chamber 102, flushing away the waste liquid remaining in the inner cavity of the cleaning chamber 102 and on the sampling needle.

[0072] In step S106, the waste liquid remaining in the inner cavity of the cleaning chamber 102, the inner cavity of the main shell 101 and the sampling needle is diluted in the cleaning water, and the cleaning water is contaminated and becomes waste liquid. The concentration of dirt in the waste liquid is continuously diluted with the flow of cleaning water in and out, and the waste liquid in the inner cavity 1012 of the main shell and the inner cavity 1022 of the cleaning chamber is emptied to complete the cleaning.

[0073] In some embodiments, if the ultrasonic cleaning device 100 described in Example 4 is used, the waste liquid in the cleaning chamber 102 can be discharged through the drain port 104.

[0074] A step S107 may be further added between steps S104 and S105, and the specific steps are:

[0075] S101, introducing a cleaning medium into the inner cavity 1022 of the cleaning chamber;

[0076] S102, controlling the sampling needle 201 to extend into the cleaning chamber 102;

[0077] S103, turning on the ultrasonic transducer 103, and starting the flushing of the inner wall of the sampling needle;

[0078] S104, draining the waste liquid in the inner cavity 1022 of the cleaning chamber;

[0079] S107, introducing cleaning water into the inner cavity 1012 of the main shell to flush the inner cavity 1012 of the main shell;

[0080] S105, introducing cleaning water into the inner cavity 1022 of the cleaning chamber, so that the cleaning water flows out from the needle inlet 1021;

[0081] S106, draining the cleaning water in the inner cavity 1012 of the main shell and the inner cavity 1022 of the cleaning chamber.

[0082] In step S107 , washing water is introduced into the inner cavity 1012 of the main shell, and the washing water flushes the inner cavity 1012 of the main shell, flushes away the waste liquid remaining in the inner cavity of the main shell 101 , and keeps the inner cavity of the main shell 101 clean.

[0083] The novel use of the present invention sets the vibration part 1031 of the ultrasonic transducer 103 on the communication path between the inner cavity 1022 of the cleaning chamber and the inner cavity 1012 of the main shell, so that the vibration part 1031 of the ultrasonic transducer 103 is immersed in the cleaning medium, and the ultrasonic cleaning effect is good. At the same time, the ultrasonic cleaning position and the vibration part 1031 of the ultrasonic transducer 103 are staggered in the vertical direction to prevent the liquid discharged from the sampling end of the sampling needle 201 from directly impacting the vibration part 1031 of the ultrasonic transducer 103, so that the sampling needle 201 can be used to wash the inner wall in the cleaning chamber 102 without transferring the sampling needle 201, and the cleaning efficiency is high. In addition, the ultrasonic cleaning and inner wall washing can be carried out at the same time, and the cleaning effect is good.

[0084] Embodiment 2

[0085] Based on the first embodiment, the distance between the cleaning position and the bottom of the inner cavity 1012 of the main shell is greater than or equal to 20 mm.

[0086] Since the ultrasonic cleaning position and the vibration-generating part 1031 of the ultrasonic transducer 103 are arranged in a vertically displaced manner, the projection of the ultrasonic cleaning position in the vertical direction falls on the bottom of the inner cavity 1012 of the main housing, that is, the cleaning liquid discharged from the sampling end of the sampling needle 201 located at the ultrasonic cleaning position impacts the bottom of the inner cavity 1012 of the main housing. When the inner wall of the sampling needle 201 is flushed, the cleaning liquid is discharged from the sampling end of the sampling needle 201 with a large flow rate, and the discharged water flow has a large pressure and flow rate (usually the pressure can reach 280kPa to 320kPa, and the flow rate can reach 3.24m / s to 4.42m / s). The closer the bottom of the inner cavity 1012 of the main housing is to the sampling end, the greater the impact force of the water flow it bears.

[0087] The distance between the cleaning position and the bottom of the inner cavity 1012 of the main shell is greater than or equal to 20 mm to prevent the water flow discharged from the sampling end from impacting the bottom of the inner cavity 1012 of the main shell due to the short distance, causing damage to the bottom of the inner cavity 1012 of the main shell or water backwashing, causing damage to the sampling needle 201.

[0088] Embodiment 3

[0089] On the basis of the second embodiment, the horizontal distance between the vibration-generating portion 1031 of the ultrasonic transducer 103 and the cleaning position is greater than or equal to 3 mm.

[0090] During the installation or use of the sampling needle 201, the sampling needle 201 cannot maintain a completely vertical state, and there may be a very small angle of deviation (0.05° to 0.2°), which cannot be detected by the naked eye and cannot be adjusted in time.

[0091] The horizontal distance between the outer edge of the vibration-generating part 1031 of the ultrasonic transducer 103 and the cleaning position is greater than or equal to 3 mm, so as to prevent the cleaning liquid discharged from the sampling end from impacting the vibration-generating part 1031 of the ultrasonic transducer 103 when the sampling needle 201 is at an angle in the vertical direction.

[0092] Embodiment 4

[0093] On the basis of the first embodiment, a liquid discharge port 104 and a liquid inlet 105 communicating with the inner cavity of the main housing 101 are respectively provided on the main housing 101 , and the liquid discharge port 104 communicates with the bottom of the inner cavity of the main housing 101 .

[0094] The liquid discharge port 104 and the liquid inlet 105 are respectively connected to the inner cavity 1012 of the main housing, and the liquid discharge port 104 is connected to the bottom of the inner cavity of the main housing 101. The liquid inlet 105 is used to fill the liquid into the inner cavity 1012 of the main housing and the inner cavity 1022 of the cleaning chamber, and the liquid discharge port 104 is used to discharge the liquid in the inner cavity 1012 of the main housing and the inner cavity 1022 of the cleaning chamber. Since the liquid discharge port 104 is connected to the bottom of the inner cavity of the main housing 101, it is convenient to completely discharge the liquid in the inner cavity 1012 of the main housing, avoid the formation of liquid accumulation in the inner cavity 1012 of the main housing, deposit pollutants, and pollute the pool body of the cleaning chamber 102, and further ensure the cleaning effect.

[0095] Embodiment 5

[0096] like Figure 1 As shown, based on the first embodiment, a ring wall 1011 surrounding the cleaning chamber 102 is extended from the main shell 101 to form a waste liquid tank 106;

[0097] The shell is also provided with a waste liquid port 107 connected to the waste liquid tank 106 .

[0098] In this embodiment, the annular wall 1011 extends from the main housing 101, and the extension direction is consistent with the direction of the needle inlet 1021. The extended annular wall 1011 forms a waste liquid tank 106, and the cleaning chamber 102 is located in the waste liquid tank 106. A waste liquid port 107 connected to the waste liquid tank 106 is provided at the bottom of the waste liquid tank 106, and the liquid in the waste liquid tank 106 can be discharged through the waste liquid port 107.

[0099] Embodiment 6

[0100] Based on the first embodiment, the distance between the cleaning position and the bottom of the inner cavity 1012 of the main housing is positively correlated with the pressure of the inner wall flushing, specifically:

[0101] P=A×L

[0102] Wherein, P is the pressure of inner wall flushing;

[0103] L is the distance between the cleaning position and the bottom of the inner cavity 1012 of the main housing;

[0104]

[0105] Where, ρ is the density of cleaning water;

[0106] S is the cross-sectional area of ​​the water outlet of the sampling needle 201;

[0107] v0 is the speed of the cleaning water flowing out of the sampling needle 201;

[0108] v1 is the speed at which the cleaning water impacts the bottom of the inner cavity 1012 of the main housing;

[0109] Δt is the time from when the cleaning water flows out from the sampling needle 201 to when it hits the bottom of the inner cavity 1012 of the main housing;

[0110] The above-mentioned ρ, S, v0, v1, and △t can all be measured through experiments.

[0111] According to the momentum theorem:

[0112] -F×Δt=mv1-mv2

[0113] Wherein, F is the impact force of the cleaning water impacting the bottom of the inner cavity 1012 of the main housing;

[0114] And m = ρ × S × L = ρ × S × v0 × Δt

[0115] Substitute m into the equation and simplify:

[0116]

[0117] It has been verified in the laboratory that the impact force of the cleaning water on the bottom of the inner cavity 1012 of the main housing is approximately equal to the pressure of the inner wall flushing.

[0118]

[0119] When the liquid flows, the flow velocity is not 0, and the liquid with velocity has an impact force, and the direction of the impact force is consistent with the velocity direction of the liquid. The greater the liquid flow velocity, the greater the impact force. The liquid flows from the liquid inlet 105 into the inner cavity 1012 of the main shell or flows from the liquid inlet 105 through the inner cavity 1012 of the main shell into the inner cavity 1022 of the cleaning cabin. The direction of the liquid inlet 105 is the velocity direction of the flowing liquid. The opening of the liquid inlet 105 faces the ultrasonic transducer 103, that is, the liquid flowing from the liquid inlet 105 faces the ultrasonic transducer 103, and the direction of the impact force of the liquid faces the ultrasonic transducer 103. The impact force when the liquid flows in helps to clean the ultrasonic transducer 103 and avoid deposition on the surface of the ultrasonic transducer 103, thereby affecting the ultrasonic effect.

[0120] Embodiment 10

[0121] like Figure 4 As shown, this embodiment further provides an analyzer 200 , including a sampling needle 201 and an ultrasonic cleaning device 100 as described in any one of Embodiments 1 to 6, wherein the sampling needle 201 is connected to a switch valve 202 and a power pump 203 .

[0122] The power pump 203 can provide power, the inlet end of the power pump 203 is connected to the cleaning water pool 204 (or other equipment or structure for containing cleaning water), and the outlet end of the power pump 203 is connected to the connection end of the sampling needle, and the cleaning water can be pumped into the sampling needle 201. The switch valve 202 is used to control whether the power pump 203 is connected to the sampling needle 201, so as to control the flushing of the inner wall.

[0123] Other implementations and beneficial effects of the analyzer of this embodiment are equivalent to the beneficial effects of the above-mentioned ultrasonic cleaning device 100, and will not be described in detail here.

[0124] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic cleaning device, characterized in that: include: A main shell and a cleaning chamber, wherein one end of the cleaning chamber is provided with a needle insertion port for inserting a needle, and the other end is connected to the main shell, and the inner cavity of the cleaning chamber communicates with the needle insertion port and the inner cavity of the main shell; An ultrasonic transducer is arranged on the main shell, and a vibration-generating portion of the ultrasonic transducer is located on a communication passage between the inner cavity of the cleaning cabin and the inner cavity of the main shell; The inner cavity of the cleaning cabin is provided with an ultrasonic cleaning position; The ultrasonic cleaning position and the vibration-generating portion of the ultrasonic transducer are staggered in the vertical direction.

2. The ultrasonic cleaning device according to claim 1, characterized in that: The distance between the cleaning position and the bottom of the inner cavity of the main shell is greater than or equal to 20 mm.

3. The ultrasonic cleaning device according to claim 2, characterized in that: The horizontal distance between the vibration-starting part of the ultrasonic transducer and the cleaning position is greater than or equal to 3 mm.

4. The ultrasonic cleaning device according to claim 1, characterized in that: The main shell is provided with a liquid discharge port and a liquid inlet connected to the inner cavity of the main shell, respectively, and the liquid discharge port is connected to the bottom of the inner cavity of the main shell.

5. The ultrasonic cleaning device according to claim 1, characterized in that: A ring wall extending from the main shell surrounds the cleaning chamber to form a waste liquid tank; The shell is also provided with a waste liquid port connected to the waste liquid tank.

6. The ultrasonic cleaning device according to claim 1, characterized in that: The distance between the cleaning position and the bottom of the inner cavity of the main housing is positively correlated with the pressure of the inner wall flushing, specifically: P=A×L Wherein, P is the pressure of inner wall flushing; L is the distance between the cleaning position and the bottom of the inner cavity of the main housing; Where, ρ is the density of cleaning water; S is the cross-sectional area of ​​the sampling needle outlet; v0 is the speed of the cleaning water flowing out of the sampling needle; v1 is the speed at which the cleaning water impacts the bottom of the inner cavity of the main housing; Δt is the time from when the cleaning water flows out from the sampling needle to when it hits the bottom of the inner cavity of the main shell.

7. An analyzer, characterized in that: It comprises a sampling needle and an ultrasonic cleaning device as claimed in any one of claims 1 to 6, wherein the sampling needle is connected to a switch valve and a power pump.

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