In vitro diagnostic analyzers, liquid supply devices and switch valve units

Abstract

The invention discloses an in vitro diagnostic analyzer, a liquid supply device and a switch valve unit, the switch valve unit comprises a mounting member, a valve seat and a valve core; the mounting member is provided with a through hole and an annular convex body arranged on the outer edge of the through hole, the annular convex body is surrounded to form a mounting groove; one end of the valve seat is inserted into the mounting groove, and the end of one end of the valve seat is sealed and matched with the side wall of the mounting member, the outer side wall of the valve seat is sealed and matched with the inner side wall of the annular convex body, the valve seat is provided with a matching cavity communicated with the through hole, and the valve seat is also provided with an air inlet hole, a liquid inlet hole and an external connection hole all communicated with the matching cavity; the valve core is provided with a valve body, the valve body is inserted into the matching cavity through the through hole, and the valve body is sealed and matched with the matching cavity, the valve body is provided with a flow channel, the valve body can move relative to the valve seat, so that the flow channel connects the air inlet hole and the external connection hole, or the flow channel connects the liquid inlet hole and the external connection hole, or the valve body seals the air inlet hole, the liquid inlet hole and the external connection hole. The switch valve unit has reliable sealing and is applied to the liquid supply device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an in vitro diagnostic analyzer, a liquid supply device and a switch valve unit. Background Art

[0002] An in vitro diagnostic analyzer is an instrument that can perform quantitative or qualitative analysis on a patient's body fluid sample. When performing sample analysis, an in vitro diagnostic analyzer often needs to be calibrated with a calibration solution.

[0003] At present, when the calibration solution is not built into the reagent card, a liquid supply device is required to provide the calibration solution for the in vitro diagnostic analyzer. In order to ensure the stability and sealing of the calibration solution components, the liquid supply device often uses a specific reagent pack for storage, and uses a switch valve unit to control the on-off of the calibration solution delivery. However, the traditional switch valve unit has design defects, which is prone to unreliable sealing, resulting in leakage or contamination of the calibration solution. Summary of the invention

[0004] Based on this, it is necessary to provide an in vitro diagnostic analyzer, a liquid supply device and a switch valve unit. The switch valve unit has a reliable seal and will not cause calibration liquid leakage or contamination when used in the liquid supply device. The in vitro diagnostic analyzer adopts a liquid supply device to ensure the authenticity of the test data.

[0005] The technical solution is as follows:

[0006] On the one hand, the present application provides a switch valve unit, including a mounting piece, a valve seat and a valve core; the mounting piece is provided with a through hole and an annular protrusion arranged on the outer edge of the through hole, and the annular protrusion is surrounded to form a mounting groove; one end of the valve seat is inserted into the mounting groove, and the end of one end of the valve seat is sealed with the side wall of the mounting piece, the outer side wall of the valve seat is sealed with the inner side wall of the annular protrusion, the valve seat is provided with a matching cavity communicated with the through hole, and the valve seat is also provided with an air inlet hole, a liquid inlet hole and an external connection hole all connected with the matching cavity; the valve core is provided with a valve body, the valve body is inserted into the matching cavity through the through hole, and the valve body is sealed with the matching cavity, the valve body is provided with a flow channel, and the valve body can move relative to the valve seat, so that the flow channel connects the air inlet hole and the external connection hole, or the flow channel connects the liquid inlet hole and the external connection hole, or the valve body seals the air inlet hole, the liquid inlet hole and the external connection hole.

[0007] The switch valve unit is fixed on the mounting member by providing an annular protrusion on the mounting member to form a mounting groove for mounting the valve seat. At the same time, the end of one end of the valve seat is sealed with the side wall of the mounting member, and the outer wall of the valve seat is sealed with the inner wall of the annular protrusion, so that a reliable sealing structure is formed between the valve seat and the mounting member, so that liquid will not overflow from between the valve seat and the mounting member. Furthermore, the valve body is sealed with the matching cavity, so that liquid will not overflow from between the valve seat and the valve body, so that the liquid can only be switched through the flow channel, and the sealing reliability of the switch valve unit is further improved.

[0008] When the switch valve unit is used, when it is necessary to output the calibration liquid, it is only necessary to drive the valve body to move so that the flow channel connects the liquid inlet hole and the external hole, and the calibration liquid can be output. After the calibration analysis is completed, the valve body is driven to move again so that the flow channel connects the air inlet hole and the external hole, and then the gas can be introduced into the reagent card, which is convenient for the calibration liquid to flow in the reagent card. When the sample liquid is extracted again, the valve body is driven to move again so that the flow channel is staggered with the air inlet hole, the liquid inlet hole and the external hole, so as to achieve the sealing of the air inlet hole, the liquid inlet hole and the external hole, that is, the air inlet hole, the liquid inlet hole and the external hole are sealed by the side wall of the valve body.

[0009] The technical solution is further described below:

[0010] In one embodiment, the air inlet hole, the liquid inlet hole and the external connection hole are arranged at intervals along the same circumference, and the valve body can rotate relative to the valve seat.

[0011] In one embodiment, the valve seat is provided with a first sealing portion, the first sealing portion is arranged in the matching cavity and close to the bottom of the matching cavity, and the valve body is provided with a second sealing portion that is sealed and matched with the first sealing portion, and the second sealing portion can rotate relative to the first sealing portion.

[0012] In one embodiment, the valve core is provided with a force-applying portion fixed to the valve body, and the force-applying portion is arranged on the outer side of the through hole.

[0013] In one of the embodiments, the switch valve unit also includes a pressure cover fixedly connected to the mounting member, the pressure cover is arranged on the outer side of the valve seat, and the pressure cover is provided with a first cover body, the first cover body is provided with an installation cavity, and the installation cavity is sealed and sleeved with the valve seat.

[0014] In one of the embodiments, the gland is provided with a second cover body fixed to the first cover body, and the second cover body is spaced apart from the valve seat to form an air inlet passage communicating with the air inlet hole.

[0015] In one embodiment, the second cover is sleeve-fitted with the outer side wall of the annular protrusion.

[0016] On the other hand, the present application also provides a liquid supply device, including a switch valve unit as in any of the above embodiments, and also including a protective shell and a liquid storage component for storing calibration liquid, the protective shell is provided with a storage cavity communicated with the through hole, the switch valve unit is installed on the protective shell through a mounting component, so that the valve seat is arranged in the storage cavity, the liquid storage component is communicated with the liquid inlet hole, and is arranged in the storage cavity.

[0017] When the liquid supply device is used, it is only necessary to drive the valve body to move so that the flow channel connects the liquid inlet hole and the external hole, so that the calibration liquid in the liquid storage part can be output. After completing the calibration analysis, the valve body is driven to move again so that the flow channel connects the air inlet hole and the external hole, and then the gas can be introduced into the reagent card to facilitate the flow of the calibration liquid in the reagent card. Before extracting the sample liquid, the valve body is driven to move again so that the flow channel is staggered with the air inlet hole, the liquid inlet hole and the external hole, so as to achieve the sealing of the air inlet hole, the liquid inlet hole and the external hole, that is, the side wall of the valve body is used to seal the air inlet hole, the liquid inlet hole and the external hole. The valve seat is arranged in the storage cavity to prevent the calibration liquid from leaking or being contaminated.

[0018] The technical solution is further described below:

[0019] In one of the embodiments, the liquid supply device also includes a support seat, which is fixed on the protective shell. The support seat is provided with a hollow needle and a connecting tube. The hollow needle is fixed on the support seat, one end of the connecting tube is connected to the hollow needle, and the other end of the connecting tube is connected to the external connection hole.

[0020] On the other hand, the present application also provides an in vitro diagnostic analyzer, including a liquid supply device as in any of the above embodiments.

[0021] When the in vitro diagnostic analyzer is in use, the calibration liquid inlet of the reagent card is docked with the external hole, and then the valve body is driven to move so that the flow channel connects the liquid inlet hole and the external hole, so that the calibration liquid in the liquid storage part can be input into the reagent card and enter the detection area for calibration; after the calibration analysis is completed, the valve body is driven to move again so that the flow channel connects the air inlet hole and the external hole, and then gas can be introduced into the reagent card, which facilitates the calibration liquid in the reagent card to flow to the waste liquid chamber. Before the sample liquid is extracted, the valve body is driven to move so that the flow channel is staggered with the air inlet hole, the liquid inlet hole and the external hole, so as to achieve the sealing of the air inlet hole, the liquid inlet hole and the external hole, so as to avoid the process of extracting the sample liquid. The air or calibration liquid is drawn into the reagent card again, which affects the extraction of the sample liquid. Since the sealing of the switch valve unit is reliable, the calibration liquid will not leak or be contaminated when used in the liquid supply device, so that the in vitro diagnostic analyzer can ensure the authenticity of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view schematic diagram of a liquid supply device shown in an embodiment;

[0023] Figure 2 for Figure 1 AA half-section schematic diagram of the liquid supply device shown;

[0024] Figure 3 for Figure 2 A partial enlarged schematic diagram shown;

[0025] Figure 4 for Figure 3 A schematic diagram showing the valve core in another position;

[0026] Figure 5 for Figure 1 A left side schematic diagram of the liquid supply device shown;

[0027] Figure 6 for Figure 5 A schematic diagram of a half-section BB of the liquid supply device shown;

[0028] Figure 7 for Figure 6 A partial enlarged schematic diagram of B shown;

[0029] Figure 8 for Figure 7 A schematic diagram showing the valve core in another position;

[0030] Fig. 9 for Figure 1 The structural exploded schematic diagram of the liquid supply device shown;

[0031] Fig.10 for Fig. 9 A partial enlarged schematic diagram of C is shown.

[0032] Description of reference numerals:

[0033] 100, switch valve unit; 110, mounting member; 114, through hole; 116, annular protrusion; 118, mounting groove; 120, valve seat; 120a, matching cavity; 122, air inlet hole; 124, liquid inlet hole; 126, external hole; 128, first sealing part; 130, valve core; 132, valve body; 102, flow channel; 104, second sealing part; 134, force-applying part; 140, pressure cover; 142, first cover body; 106, mounting cavity; 144, second cover body; 108, air inlet channel; 200, protective shell; 210, storage cavity; 400, liquid storage member; 300, support seat; 310, hollow needle; 320, connecting pipe; 330, air outlet needle; 340, air outlet pipe.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] like Figure 2 , Figure 6 , Fig. 9 and Fig.10 As shown, in one embodiment, a liquid supply device is provided, including a switch valve unit 100, a protective shell 200, and a liquid storage member 400 for storing a calibration liquid.

[0039] like Figures 1 to 3 , Figure 7 and Fig.10 As shown, in one embodiment, the switch valve unit 100 includes a mounting member 110, a valve seat 120 and a valve core 130; the mounting member 110 is provided with a through hole 114 and an annular protrusion 116 arranged on the outer edge of the through hole 114, and the annular protrusion 116 is surrounded to form a mounting groove 118; one end of the valve seat 120 is inserted into the mounting groove 118, and the end of one end of the valve seat 120 is sealed with the side wall of the mounting member 110, the outer side wall of the valve seat 120 is sealed with the inner side wall of the annular protrusion 116, the valve seat 120 is provided with a matching cavity 120a communicated with the through hole 114, and the valve seat 120 is also An air inlet hole 122, a liquid inlet hole 124 and an external hole 126 are provided, all of which are connected to the matching cavity 120a; the valve core 130 is provided with a valve body 132, the valve body 132 is inserted into the matching cavity 120a through the through hole 114, and the valve body 132 is sealed and matched with the matching cavity 120a, the valve body 132 is provided with a flow channel 102, the valve body 132 can move relative to the valve seat 120, so that the flow channel 102 is connected to the air inlet hole 122 and the external hole 126, or the flow channel 102 is connected to the liquid inlet hole 124 and the external hole 126, or the valve body 132 seals the air inlet hole 122, the liquid inlet hole 124 and the external hole 126.

[0040] The protective shell 200 is provided with a storage cavity 210 communicating with the through hole 114 . The switch valve unit 100 is installed on the protective shell 200 through the mounting member 110 , so that the valve seat 120 is arranged in the storage cavity 210 . The liquid storage member 400 is communicated with the liquid inlet hole 124 and is arranged in the storage cavity 210 .

[0041] like Figure 3 and Figure 4 As shown, the switch valve unit 100 is provided in the storage cavity 210 by arranging the mounting member 110, and using the annular protrusion 116 on the mounting member 110 to form the mounting groove 118 for mounting the valve seat 120, so that the valve seat 120 is fixed in the storage cavity 210 for protection, and the liquid can be prevented from overflowing from the storage cavity 210. At the same time, the end of one end of the valve seat 120 is sealed with the side wall of the mounting member 110, and the outer wall of the valve seat 120 is sealed with the inner wall of the annular protrusion 116, so that a reliable sealing structure is formed between the valve seat 120 and the mounting member 110, so that the liquid will not overflow from between the valve seat 120 and the mounting member 110; and the mounting member 110 and the protective shell 200 are easily sealed, so that the liquid can be easily prevented from overflowing from the storage cavity 210. Furthermore, the valve body 132 is sealed with the matching cavity 120a, so that the liquid will not overflow from between the valve seat 120 and the valve body 132, so that the liquid can only be switched through the flow channel 102, further improving the sealing reliability of the switch valve unit 100.

[0042] When the liquid supply device is used, it is only necessary to drive the valve body 132 to move so that the flow channel 102 is connected to the liquid inlet hole 124 and the external connection hole 126, and the calibration liquid can be output (such as Figure 3 and Figure 7 After the calibration analysis is completed, the valve body 132 is driven to move, so that the flow channel 102 is connected to the air inlet 122 and the external connection hole 126, and then the gas can be introduced into the reagent card to facilitate the flow of the calibration liquid in the reagent card (as shown in FIG. Figure 4 and Figure 8 Before the sample liquid is extracted, the valve body 132 is driven to move so that the flow channel 102 is staggered with the air inlet hole 122, the liquid inlet hole 124 and the external hole 126, so as to seal the air inlet hole 122, the liquid inlet hole 124 and the external hole 126, that is, the side wall of the valve body 132 is used to seal the air inlet hole 122, the liquid inlet hole 124 and the external hole 126. The valve seat 120 is arranged in the storage cavity 210, that is, the air inlet hole 122 is also arranged in the storage cavity 210, which can prevent the calibration liquid from leaking or being contaminated.

[0043] It should be noted that the specific structure of the "liquid storage component 400" includes but is not limited to a liquid storage tank, a liquid storage box, a liquid storage bag, etc.

[0044] Specifically in this embodiment, the liquid storage member 400 is an aluminum-plastic composite film bag, which is conducive to ensuring aseptic and sealed storage of the calibration liquid and extending the shelf life of the calibration liquid of the liquid supply device.

[0045] It should be noted that “the valve body 132 can move relative to the valve seat 120 ” includes rotation and reciprocating linear movement, which can be selected according to the arrangement of the air inlet 122 , the liquid inlet 124 and the external connection hole 126 .

[0046] It should be noted that the "mounting member 110" and the "protective shell 200" are manufactured in one piece, such as by injection molding; they can also be manufactured separately and then assembled and fixed together.

[0047] Specifically in this embodiment, the “installation member 110 ” and the “protective shell 200 ” are integrally injection molded into a whole.

[0048] Specifically in this embodiment, Figure 6 to Figure 7 As shown, the air inlet hole 122, the liquid inlet hole 124 and the external hole 126 are arranged at intervals along the same circumference, and the valve body 132 can rotate relative to the valve seat 120. In this way, the flow channel 102 can be switched by rotating the valve body 132, and the air inlet hole 122 and the external hole 126 can be connected, or the liquid inlet hole 124 and the external hole 126 can be connected, or none of them can be connected with the air inlet hole 122, the liquid inlet hole 124 and the external hole 126, and the valve body 132 can be used to achieve sealing. At the same time, it is also beneficial to improve the reliability of the sealing cooperation between the valve body 132 and the through hole 114.

[0049] Based on the above embodiments, Figure 3 and Figure 4 As shown, in one embodiment, the valve seat 120 is provided with a first sealing portion 128, which is arranged in the matching cavity 120a and close to the bottom of the matching cavity 120a, and the valve body 132 is provided with a second sealing portion 104 which is sealed and matched with the first sealing portion 128, and the second sealing portion 104 can rotate relative to the first sealing portion 128. In this way, the sealing performance of the valve body 132 and the valve seat 120 is further improved by utilizing the cooperation between the first sealing portion 128 and the second sealing portion 104, so that the liquid can only flow through the flow channel 102, and the risk of calibration liquid leakage is further avoided.

[0050] Specifically, Figure 3 and Figure 4 As shown, the first sealing portion 128 is an annular protrusion, and the second sealing portion 104 is an annular groove that is interference-fitted with the annular protrusion. The interference fit between the annular protrusion and the annular groove enables the valve body 132 and the valve seat 120 to closely fit to form a sealing structure.

[0051] Or, equivalently, the second sealing portion 104 is an annular protrusion, and the first sealing portion 128 is an annular groove that is interference-fitted with the annular protrusion.

[0052] Based on any of the above embodiments, Figure 3 and Figure 4As shown, in one embodiment, the valve core 130 is provided with a force applying portion 134 fixed to the valve body 132, and the force applying portion 134 is arranged outside the through hole 114. In this way, the valve body 132 can be driven to move by only driving the force applying portion 134, which is convenient for operation and control of switching of the flow channel 102.

[0053] Specifically, the force applying portion 134 is a knob structure, a handle structure, an inner hexagon structure, an outer hexagon structure, etc.

[0054] Based on any of the above embodiments, Figure 3 and Figure 4 As shown, in one embodiment, the switch valve unit 100 further includes a gland 140 fixedly connected to the mounting member 110, the gland 140 is disposed on the outer side of the valve seat 120, and the gland 140 is provided with a first cover body 142, the first cover body 142 is provided with a mounting cavity 106, and the mounting cavity 106 is sealed and sleeved with the valve seat 120. In this way, the valve seat 120 is fixed to the mounting member 110 by the gland 140, and the mounting cavity 106 of the first cover body 142 is sealed and sleeved with the valve seat 120. At this time, the matching cavity 120a can be a through cavity, and the first cover body 142 is used to cooperate with the valve seat 120 to form a sealing structure.

[0055] It can be understood that the matching cavity 120a is a through cavity, which is convenient for air to flow out, making the installation and matching of the valve body 132 and the valve seat 120 smoother. The sealing performance of the valve seat 120 and the mounting part 110, the valve seat 120 and the valve body 132, and the valve body 132 and the mounting part 110 can be ensured first, and then the first pressure cover 140 can be used to further fix it. At the same time, the first cover body 142 is used to close the matching cavity 120a, so as to form a sealing reliable switch valve structure, so that the liquid can only be switched through the flow channel 102.

[0056] Based on the above embodiments, Figure 3 and Figure 4 As shown, in one embodiment, the gland 140 is provided with a second cover body 144 fixed to the first cover body 142, and the second cover body 144 and the valve seat 120 are spaced apart to form an air inlet channel 108 communicating with the air inlet hole 122. In this way, the air inlet channel 108 is formed by the second cover body 144 and the valve seat 120, so that the air inlet hole 122 is not directly exposed to the outside, thereby avoiding blockage of the air inlet hole 122. At the same time, the air inlet channel 108 is used to form a circuitous air inlet flow channel, which is conducive to blocking impurities, preventing impurities from entering the flow channel 102 and subsequent pipelines through the air inlet hole 122, contaminating the calibration liquid, and affecting the authenticity of the test data.

[0057] In addition, it can be understood that the air intake channel 108 is formed by spacing the second cover body 144 and the valve seat 120, which eliminates the need to set an air intake pipe, thereby reducing manufacturing costs; and at the same time, it avoids the situation where the air intake pipe falls off after a long working time, affecting the air intake.

[0058] Based on the above embodiments, Figure 3 and Figure 4 As shown, in one embodiment, the second cover 144 is sleeved with the outer wall of the annular protrusion 116. In this way, the annular protrusion 116 and the second cover 144 are sleeved together to fix the pressure cover 140, making the overall structure more compact.

[0059] There are many ways to fix the first cover 142 and the second cover 144, such as screw connection, welding, bonding, etc. Specifically in this embodiment, the two are integrally formed and manufactured.

[0060] Based on any of the above embodiments, Figure 6 and Fig. 9 As shown, in one embodiment, the liquid supply device also includes a support seat 300, the support seat 300 is fixed on the protective shell 200, the support seat 300 is provided with a hollow needle 310 and a connecting tube 320, the hollow needle 310 is fixed on the support seat 300, one end of the connecting tube 320 is connected to the hollow needle 310, and the other end of the connecting tube 320 is connected to the external hole 126. In this way, the hollow needle 310 and the support seat 300 are used to form a socket for docking the reagent card, which is convenient for fixing the reagent card on the support seat 300 to extract the calibration liquid. In addition, the setting of the connecting tube 320 allows the position of the hollow needle 310 in the support seat 300 to be flexibly set.

[0061] Based on the above embodiments, Figure 6 , Figure 7 and Fig. 9 As shown, in one embodiment, the support base 300 is further provided with an air outlet needle 330 and an air outlet pipe 340 connected to the air outlet needle 330, and the air outlet needle 330 is spaced apart from the hollow needle 310. In this way, the air outlet needle 330 can be connected to the air extraction hole of the reagent card, and then the air outlet pipe 340 can be connected to the vacuum pump to provide negative pressure for the flow channel 102 of the reagent card.

[0062] In one embodiment, an in vitro diagnostic analyzer is also provided, comprising a liquid supply device as in any of the above embodiments.

[0063] When the in vitro diagnostic analyzer is used, the calibration liquid inlet of the reagent card is docked with the external hole 126, and then the valve body 132 is driven to move, so that the flow channel 102 is connected to the liquid inlet hole 124 and the external hole 126, so that the calibration liquid in the liquid storage part 400 can be input into the reagent card and enter the detection area for calibration; after the calibration analysis is completed, the valve body 132 is driven to move, so that the flow channel 102 is connected to the air inlet hole 122 and the external hole 126, and then gas can be injected into the reagent card, so that the calibration liquid in the reagent card flows to the waste liquid chamber. Before the sample liquid is extracted, the valve body 132 is driven to move, so that the flow channel 102 is staggered with the air inlet hole 122, the liquid inlet hole 124 and the external hole 126, so as to achieve the sealing of the air inlet hole 122, the liquid inlet hole 124 and the external hole 126, so as to avoid the air or calibration liquid being drawn into the reagent card again during the process of extracting the sample liquid, which affects the extraction of the sample liquid. Since the sealing of the switch valve unit 100 is reliable, the calibration liquid will not leak or be contaminated when used in the liquid supply device, so that the in vitro diagnostic analyzer can ensure the authenticity of the test data.

[0064] It should be noted that, equivalently, "some body" or "some part" can be a part of the corresponding "component", that is, "some body" or "some part" can be integrally formed with the "other parts of the component"; or it can be an independent component separable from the "other parts of the component", that is, "some body" or "some part" can be independently manufactured and then combined with the "other parts of the component" into a whole. The expression of the above-mentioned "some body" or "some part" in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as it contains the above-mentioned features and has the same function, it should be understood as an equivalent technical solution of this application.

[0065] It should be noted that the components included in the "unit", "assembly", "mechanism" and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as the above components are included and have the same functions, it should be understood that it is an equivalent technical solution of this application.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed on", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. Further, when an element is considered to be "fixed transmission connected" to another element, the two may be fixed in a detachable connection manner or in a non-detachable connection, as long as power transmission can be achieved, such as socketing, snap-on, one-piece fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0071] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A switch valve unit, characterized in that: include: A mounting member, wherein the mounting member is provided with a through hole and an annular protrusion arranged on the outer edge of the through hole, and the annular protrusion is arranged to form a mounting groove; A valve seat, one end of which is inserted into the mounting groove, and an end portion of which is sealed with a side wall of the mounting member, an outer side wall of the valve seat is sealed with an inner side wall of the annular convex body, the valve seat is provided with a matching cavity communicating with the through hole, and the valve seat is further provided with an air inlet hole, a liquid inlet hole and an external connection hole, all of which are connected with the matching cavity; and A valve core, wherein the valve core is provided with a valve body, the valve body is inserted into the matching cavity through the through hole, and the valve body is sealed and matched with the matching cavity, the valve body is provided with a flow channel, and the valve body can move relative to the valve seat, so that the flow channel communicates with the air inlet hole and the external hole, or the flow channel communicates with the liquid inlet hole and the external hole, or the valve body seals the air inlet hole, the liquid inlet hole and the external hole; A pressure cover, wherein the pressure cover is arranged on the outer side of the valve seat and is fixedly connected to the mounting member; the pressure cover is provided with a first cover body and a second cover body fixed to the first cover body, the first cover body is provided with a mounting cavity, the mounting cavity is sealingly sleeved with the valve seat, the second cover body is sleeved with the outer side wall of the annular convex body, and the second cover body and the valve seat are spaced apart to form an air inlet channel communicating with the air inlet hole.

2. The switch valve unit according to claim 1, characterized in that: The air inlet hole, the liquid inlet hole and the external connection hole are arranged at intervals along the same circumference, and the valve body can rotate relative to the valve seat.

3. The switch valve unit according to claim 2, characterized in that: The valve seat is provided with a first sealing portion, which is arranged in the matching cavity and close to the bottom of the matching cavity. The valve body is provided with a second sealing portion that is sealed and matched with the first sealing portion, and the second sealing portion can rotate relative to the first sealing portion.

4. The switch valve unit according to claim 3, characterized in that: The first sealing portion is an annular protrusion, and the second sealing portion is an annular groove that is interference fit with the annular protrusion; or, the second sealing portion is an annular protrusion, and the first sealing portion is an annular groove that is interference fit with the annular protrusion.

5. The switch valve unit according to claim 1, characterized in that: The valve core is provided with a force applying portion fixed to the valve body, and the force applying portion is arranged outside the through hole.

6. The switch valve unit according to claim 5, characterized in that: The force applying part is a knob structure, a handle structure, an inner hexagon structure or an outer hexagon structure.

7. The switch valve unit according to claim 1, characterized in that: The first cover body and the second cover body are integrally formed.

8. A liquid supply device, characterized in that: It comprises a switch valve unit as described in any one of claims 1 to 7, and also comprises a protective shell and a liquid storage component for storing calibration liquid, the protective shell is provided with a storage cavity communicated with the through hole, the switch valve unit is mounted on the protective shell through the mounting component, so that the valve seat is arranged in the storage cavity, the liquid storage component is communicated with the liquid inlet hole, and is arranged in the storage cavity.

9. The liquid supply device according to claim 8, characterized in that: The liquid supply device also includes a support seat, which is fixed on the protective shell. The support seat is provided with a hollow needle and a connecting tube. The hollow needle is fixed on the support seat, one end of the connecting tube is connected to the hollow needle, and the other end of the connecting tube is connected to the external connection hole.

10. An in vitro diagnostic analyzer, characterized in that: Comprising the liquid supply device as claimed in claim 8 or 9.

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