CN112610725A

CN112610725A - Multi-way valve and using method thereof

Info

Publication number: CN112610725A
Application number: CN202011534225.7A
Authority: CN
Inventors: 梁校; 王伟; 丁文桂
Original assignee: Shandong Junteng Medical Technology Co ltd
Current assignee: Shandong Junteng Medical Technology Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-04-06
Anticipated expiration: 2040-12-23
Also published as: CN112610725B

Abstract

The application discloses a multi-way valve and a using method thereof, the multi-way valve comprises a support frame, a motor, a valve head, a valve core, a code disc and a first sensor, wherein the valve head is provided with a first through hole and a plurality of second through holes; the coded disc is provided with a plurality of alignment parts which coaxially rotate along with the valve core, and the first sensor is used for sensing the alignment parts. The multi-way valve has the advantages of simple and reasonable structure, convenience in use and control, relatively large flow area, capability of meeting the use requirements of medical workers on multiple scenes such as large-dose reagents and the like, accuracy in control and positioning, capability of effectively avoiding the phenomenon that the tissue reagent is blocked or cannot flow, and high controllability, usability and practicability.

Description

Multi-way valve and using method thereof

Technical Field

The application relates to the technical field of pathological tissue equipment, in particular to a multi-way valve and a using method thereof.

Background

In pathological tissue treatment, dehydration of pathological tissue has a great influence on the sheet-discharging effect. Due to the complexity of the dehydration process, more reagents are required in the dehydration process. Pretreatment, processing, soaking wax, washing every process all need a large amount of different reagents, must carry out accurate location and accurate control to the valve body using different reagent circulation in-process to prevent with wrong reagent or the reagent confusion phenomenon appears, current valve body can't satisfy medical personnel's user demand.

In addition, each reagent needs to enter the treatment cylinder at different temperatures, so that the switching valve needs to have a large caliber and can accurately and quickly respond, most medical valve bodies do not have a heating function, the drift diameter is small, and the use requirement of equipment cannot be met.

Disclosure of Invention

The present application provides a multi-way valve to address at least one of the above technical problems.

The technical scheme adopted by the application is as follows:

the utility model provides a multi-ported valve, includes the support frame and is fixed in the motor of support frame still includes:

the valve head is provided with a first through hole and a plurality of second through holes, and the second through holes are uniformly distributed in the same circumferential direction by taking the first through hole as a center;

the valve core is in sealing sleeve with the valve head, is in transmission connection with the motor and is driven by the motor to control the valve head to rotate relative to the valve head, and is provided with a first liquid port and a second liquid port, wherein the first liquid port corresponds to the first through hole, the second liquid port corresponds to any one of the second through holes, and the first liquid port is communicated with the second liquid port;

the coded disc is fixed on the valve core and coaxially rotates along with the valve core, and is provided with a plurality of alignment parts which are in one-to-one correspondence with the second through holes; and

the first sensor is fixed on the support frame and used for sensing the alignment part.

Furthermore, the coded disc is also provided with a positioning part, and the positioning part corresponds to the alignment part;

the multi-way valve further comprises a second sensor, and the second sensor is fixed on the supporting frame and used for sensing the positioning portion.

Furthermore, a first ring and a second ring which are coaxial are formed on the top surface of the coded disc in a protruding mode, the first ring is located on the inner side of the second ring, the aligning portion is arranged on the first ring, and the positioning portion is arranged on the second ring.

Furthermore, the alignment part and the positioning part are notches or bulges arranged on the first circular ring and the second circular ring.

Furthermore, the coded disc is also provided with a stopping part, and the stopping part is positioned between two adjacent alignment parts.

Further, the number of the second through holes is 12.

Furthermore, the positioning portion includes a first positioning portion, a second positioning portion and a third positioning portion, the first positioning portion includes four first sub-positioning portions arranged in sequence, the second positioning portion and the first positioning portion are separated by two positioning portions, and the third positioning portion and the second positioning portion are separated by one positioning portion.

Furthermore, the multi-way valve comprises a plurality of second sensors, the second sensors are arranged in the same circumferential direction, the circumferential distance between every two adjacent second sensors is equal to the distance between every two adjacent first sub-positioning portions, and the number of the second sensors is at least four.

Further, the valve head is provided with heating element, heating element includes heating rod and temperature sensor, the heating rod is used for heating the valve head, temperature sensor is used for responding to the temperature of valve head.

The application also provides a method for using the multi-way valve, which at least comprises the following steps,

s1: the liquid inlet pipeline is controlled to be communicated with the first through hole (the second through hole), and the liquid outlet pipeline is controlled to be communicated with the second through hole (the first through hole);

s2: calibrating, namely controlling the motor to rotate, wherein the first sensor senses the alignment part, the second sensor senses the positioning part, and when the first sensor senses the alignment part and a plurality of second sensors sense a plurality of first sub-positioning parts at the same time, the second through hole corresponding to the second liquid port is marked as 1;

s3: positioning, controlling the motor to continue rotating, marking the second through hole corresponding to the second liquid port as 2 when the first sensor senses the next alignment part, and repeating the steps until the second through hole is marked;

s4: and stopping, if the use is finished or suspended, controlling the motor to rotate until the first sensor senses the stopping part, and controlling the motor to stop.

Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:

the utility model provides a plurality of second through-holes of multi-way valve head use first through-hole as the center, evenly arrange with the circumferencial direction, not only make a plurality of through-holes arrange simple structure reasonable, effectively reduce the volume of valve head moreover, or under the certain circumstances of valve head volume, effectively increase the flow area of through-hole, satisfy medical personnel to the user demand of high dose reagent. In the process of driving the valve core to rotate by the motor, the first liquid port is always correspondingly communicated with the first through hole, and the second liquid port can be rotated to the position of any second through hole and correspondingly communicated with the second through hole, so that a liquid inlet and outlet channel is controlled to be formed or changed, and the application control on the tissue reagent is realized. In the process of rotating the valve core, the coded disc and the valve core rotate together, and the alignment parts and the second through holes correspond to each other one by one. The multi-way valve has the advantages of simple and reasonable structure, convenience in use and control, relatively large flow area, capability of meeting the use requirements of medical workers on multiple scenes such as large-dose reagents and the like, accuracy in control and positioning, capability of effectively avoiding the phenomenon that the tissue reagent is blocked or cannot flow, and high controllability, usability and practicability.

The utility model provides an in-process of multi-ported valve code wheel along with case pivoted, location portion corresponds with the alignment portion, the alignment portion is used for the alignment effect of second liquid mouth and second through-hole, location portion is used for the positioning action of alignment portion, when the alignment portion is sensed to first sensor, location portion is sensed to the second sensor, system control motor stall, can make the second liquid mouth carry out the accurate positioning with the second through-hole of concrete position, thereby realize the alignment positioning effect of first liquid mouth and second through-hole, the circulation passageway position of tissue reagent has been made clear, realize the judgement and the accurate control of tissue reagent circulation route, effectively avoid the motor to drive the repeated corotation of case or reversal in-process, because of the hole site that first sensor misreport formed corresponds wrong condition, the accurate controllability of valve body has been improved greatly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a multi-way valve according to the present disclosure.

FIG. 2 is a schematic structural view of the multi-port valve portion subassembly of FIG. 1.

Fig. 3 is a top view of the subassembly of fig. 2 with the sensor mounting plate removed.

FIG. 4 is a schematic view of the code wheel of the multi-way valve of FIG. 2.

Fig. 5 is an exploded view of the multi-port valve portion assembly of fig. 2.

Fig. 6 is a schematic top view of fig. 4.

Fig. 7 is a schematic cross-sectional view along section AA in fig. 6.

Wherein the content of the first and second substances,

the device comprises a support frame 1, a motor 2, a valve head 3, a first through hole 4, a second through hole 5, a valve core 6, a first liquid port 7, a second liquid port 8, a coded disc 9, a positioning part 10, a first sensor 11, a positioning part 12, a second sensor 13, a first ring 14, a second ring 15, a stopping part 16, a first positioning part 17, a first sub-positioning part 171, a second positioning part 18, a third positioning part 19 and a heating assembly 20.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationship shown in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 7, the present application provides a multi-way valve, which includes a support frame 1 and a motor 2 fixed on the support frame 1, and further includes:

the valve head 3 is provided with a first through hole 4 and a plurality of second through holes 5, and the plurality of second through holes 5 are uniformly distributed in the same circumferential direction by taking the first through hole 4 as a center;

the valve core 6 is sleeved with the valve head 3 in a sealing manner, the valve core 6 is in transmission connection with the motor 2 and is driven and controlled by the motor 2 to rotate relative to the valve head 3, the valve core 6 is provided with a first liquid port 7 and a second liquid port 8, the first liquid port 7 corresponds to the first through hole 4, the second liquid port 8 corresponds to any one of the second through holes 5, and the first liquid port 7 is communicated with the second liquid port 8;

the coded disc 9 is fixed on the valve core 6 and coaxially rotates along with the valve core 6, the coded disc 9 is provided with a plurality of alignment parts 10, and the alignment parts 10 correspond to the second through holes 5 one by one; and

the first sensor 11 is fixed on the supporting frame 1 for sensing the alignment portion 10.

The case 6 of this application multi-ported valve is established with valve head 3 sealing sleeve, avoids 6 pivoted in-process weeping phenomena of case to take place, guarantees the security that the multi-ported valve used. A plurality of second through-holes 5 of valve head 3 use first through-hole 4 as the center, evenly arrange with the circumferencial direction, not only make a plurality of through-holes simple structure of arranging reasonable, effectively reduce valve head 3's volume moreover, or under the certain circumstances of valve head 3 volume, effectively increase the flow area of through-hole, satisfy medical personnel to the user demand of high dose reagent.

In the process that the motor 2 drives the valve core 6 to rotate, the first liquid port 7 is always correspondingly communicated with the first through hole 4, and the second liquid port 8 can be rotated to any position of the second through hole 5 and correspondingly communicated with the second through hole, so that a liquid inlet and outlet channel is controlled to be formed or changed, and the application control of the tissue reagent is realized. In the above structure, when in use, the first through hole 4 can be used as a liquid inlet or a liquid outlet, and the second liquid port 8 can be set as one or more than one and is respectively communicated with the first liquid port 7 through a liquid channel, so as to realize the valve port switching situation of one-to-many or multiple-to-one, and meet the applicability and controllability of multiple scenes.

Simultaneously, at case 6 pivoted in-process, code wheel 9 rotates with case 6 together, the mutual one-to-one of alignment portion 10 and second through-hole 5, when first sensor 11 senses alignment portion 10, control motor 2 stall, can make second liquid mouth 8 and second through-hole 5 carry out accurate alignment, prevent that motor 2 from driving the in-process of case 6 repeated corotation or reversal, second liquid mouth 8 appears and second through-hole 5 dislocation leads to organizing that the reagent circulation is blocked up or unable circulation phenomenon takes place, the controllability and the usability, the practicality of improvement valve body.

It can be seen from above that, the multi-ported valve of this application simple structure is reasonable, and use control is convenient, has relatively great flow area, satisfies medical personnel to the user demand of many scenes such as bulk dose reagent to control the location is accurate, effectively avoids organizing the reagent circulation to receive stifled or unable circulation phenomenon to take place, has higher controllability and usability, practicality.

Further, as shown in fig. 2 to 4, the code wheel 9 is further provided with a positioning portion corresponding to the alignment portion 10; the multi-way valve further comprises a second sensor 13, and the second sensor 13 is fixed on the support frame 1 and used for sensing the positioning part.

In the process that the coded disc 9 rotates along with the valve core 6, the positioning portion corresponds to the positioning portion 10, the positioning portion 10 is used for the positioning effect of the second liquid port 8 and the second through hole 5, the positioning portion is used for the positioning effect of the positioning portion 10, when the first sensor 11 senses the positioning portion 10, the second sensor 13 senses the positioning portion, the system controls the motor 2 to stop rotating, the second liquid port 8 and the second through hole 5 in specific positions can be accurately positioned and positioned, the positioning effect of the first liquid port 7 and the second through hole 5 is realized, the position of a flow channel of an organization reagent is determined, the judgment and the accurate control of the flow channel of the organization reagent are realized, the situation that the motor 2 drives the valve core 6 to rotate forwards or backwards repeatedly is effectively avoided, the situation that the hole site of the first sensor is mistakenly reported and corresponds to be wrong is effectively avoided, and the accurate controllability of the valve body is greatly improved.

Further, a first circular ring 14 and a second circular ring 15 which are coaxial are formed on the top surface of the code wheel 9 in a protruding manner, the first circular ring 14 is located on the inner side of the second circular ring 15, the alignment portion 10 is arranged on the first circular ring 14, and the positioning portion is arranged on the second circular ring 15.

As shown in fig. 2 to 4, two coaxial rings are protruded on the top surface of the code wheel 9, a first ring 14 on the inner side is provided with a positioning part 10, a second ring 15 on the outer side is provided with a positioning part, and the code wheel 9 is fixedly arranged on the valve core 6 to rotate together with the valve core. Make code wheel 9 simple structure on the one hand, make things convenient for code wheel 9 to process the preparation, on the other hand makes things convenient for the installation of code wheel 9 fixed, effectively improves the processing preparation efficiency of valve body.

In addition, the second ring 15 located on the outer side has a relatively larger circumference than the first ring 14 located on the inner side, which not only facilitates the processing and installation of the positioning portion, but also facilitates the sensing of the positioning portion by the second sensor 13, which is beneficial to reducing the rotation error and improving the precise positioning of the positioning portion.

Correspondingly, the first sensor 11 and the second sensor 13 are respectively and correspondingly arranged with the first circular ring 14 and the second circular ring 15, the first sensor 11 is positioned on the inner side, and the second sensor 13 is positioned on the outer side, so that the alignment part 10 and the positioning part can be conveniently induced, and the controllability of the valve body is improved.

Further, as shown in fig. 4, the alignment portion 10 and the positioning portion are notches or protrusions provided on the first ring 14 and the second ring 15.

The alignment part 10 and the positioning part are notches or bulges on the first circular ring 14 and the second circular ring 15, and the sensor is simple in structure, convenient to process and manufacture and convenient to sense. When the structure is a notch structure, the two sensing points of the first sensor 11 or the second sensor 13 are positioned when being detected mutually; when the sensor is a convex structure, the two sensing points of the first sensor 11 or the second sensor 13 are positioned when they are separated from each other. In the embodiment of the present application, the alignment portion 10 and the positioning portion are both provided in the form of a notch for convenience of explanation.

Further, as shown in fig. 4, the code wheel 9 is further provided with a stop portion 16, and the stop portion 16 is located between two adjacent alignment portions 10. When the valve body is used or is used in a pause mode, the stop part 16 of the coded disc 9 is used for stopping positioning of the valve core 6, when the first sensor 11 senses the stop part 16, the motor 2 stops rotating, and the second liquid port 8 of the valve core 6 is disconnected from any second through hole 5 of the valve head 3, so that the phenomena of liquid overflow and liquid leakage caused by misoperation of the tissue reagent are effectively prevented, and the controllability of the valve body is improved.

The stop portion 16 may be provided with a notch or a projection similar to the alignment portion 10 or the positioning portion, or may be provided with another form of structure that can be sensed by the first sensor 11, as long as the function of position detection can be achieved.

Further, as shown in fig. 5, the number of the second through holes 5 is 12. The quantity of second through-hole 5 is 12 for the last liquid dropping control of 12 kinds of different tissue reagents is no less than in the valve body simultaneous control intercommunication, thereby satisfies the effect that most pathological tissue dewater out the piece, effectively improves the suitability of the many scenes of valve body, satisfies medical personnel's user demand.

Further, as shown in fig. 4, the positioning portions include a first positioning portion 17, a second positioning portion 18 and a third positioning portion 19, the first positioning portion 17 includes four first sub-positioning portions arranged in sequence, the second positioning portion 18 is separated from the first positioning portion 17 by two positioning portions 10, and the third positioning portion 19 is separated from the second positioning portion 18 by one positioning portion 10.

This application adopts the location portion of three different positions to carry out coding control to realize the accurate positioning function of second through-hole 5. Specifically, with a plurality of alignment portions 10(12 alignment portions 10) uniformly arranged on the first ring 14 as a reference, the second ring 15 is equally divided along the circumferential direction, four first sub-alignment portions are sequentially arranged clockwise or counterclockwise, then two alignment portions 10 are spaced to provide the second alignment portion 18, and then one alignment portion 10 is spaced to provide the third alignment portion 19.

Further, as shown in fig. 3, the multi-way valve includes a plurality of second sensors 13, the plurality of second sensors 13 are arranged in the same circumferential direction, a circumferential distance between two adjacent second sensors 13 is equal to a distance between two adjacent first sub-positioning portions, and the number of the second sensors 13 is at least four.

At least four second sensors 13 are sequentially arranged in the same circumferential direction to correspond to the positioning portions, and are used for being matched with the positioning portions to perform encoding and decoding control. When the coded disc 9 rotates to a certain position, the four second sensors 13 and the four first sub-positioning portions can correspond one to one, so that the second sensors 13 can be positioned and arranged, and in the process that the coded disc 9 continues to rotate, the positioning portions are matched for decoding and positioning.

Further, as shown in fig. 7, the valve head 3 is provided with a heating element 20, the heating element 20 includes a heating rod for heating the valve head 3 and a temperature sensor for sensing the temperature of the valve head 3.

Heating element 20 that valve head 3 set up can heat the tissue reagent of circulation valve body to carry out accurate control to the temperature of tissue reagent, realize the self-heating function of valve body, improve the usability of the many scenes of valve body, satisfy medical personnel to the demand of tissue reagent temperature.

As shown in fig. 5, the multi-way valve can be divided into a stator mechanism, a rotor mechanism and a heating mechanism, and the stator mechanism mainly includes a valve head 3, a stator disc and a stator pressing plate. The valve head 3 is often assembled and disassembled due to the joint, is convenient for heat conduction, and is made of stainless steel materials. The stator disc is made of ceramic material. The stator disc is positioned through a pin, and an O-shaped sealing ring is designed between the stator disc and the valve head 3 to ensure the sealing between the stator disc and the valve head 3 of the rotary valve. The stator pressure plate mainly fixes the stator plate and is convenient for dismounting and cleaning the stator plate. The rotor mechanism (valve core 6) mainly comprises a rotor disc, a bearing compression spring and a rotor pressing plate, wherein the stator disc and the rotor disc are mainly sealed in an end face sealing mode. The rotor disc is made of ceramic materials, the high-precision surface of the ceramic can ensure good air tightness, and the high hardness and the high wear resistance can ensure the service life of the rotor disc. In order to ensure good sealing pressure, a compression spring and a bearing are arranged on the sealing ring. The valve head 3 is heated mainly by the heating rod and its series temperature sensor constitutes, but the accurate adjustment valve head 3 temperature. The positioning device mainly comprises a code disc 9, a code disc 9 and a sensor on the code disc 9, and the motor 2 adopts a common motor 2 to provide kinetic energy.

s1: the liquid inlet pipeline is controlled to be communicated with the first through hole 4 (the second through hole 5), and the liquid outlet pipeline is controlled to be communicated with the second through hole 5 (the first through hole 4);

s2: calibrating, namely controlling the motor 2 to rotate, wherein the first sensor 11 senses the alignment part 10, the second sensor 13 senses the positioning parts, and when the first sensor 11 senses the alignment part 10 and a plurality of second sensors 13 sense a plurality of first sub-positioning parts at the same time, the second through hole 5 corresponding to the second liquid port 8 is marked as number 1;

s3: positioning, controlling the motor 2 to continue rotating, marking the second through hole 5 corresponding to the second liquid port 8 as number 2 when the first sensor 11 senses the next alignment part 10, and repeating the steps until the second through hole 5 is marked;

s4: and stopping, if the use is finished or suspended, controlling the motor 2 to rotate until the first sensor 11 senses the stopping part 16, and controlling the motor 2 to stop.

In the step S1, the liquid inlet pipeline may be connected to the first through hole 4 or the second through hole 5, and when the first through hole 4 is connected to the liquid inlet pipeline, the second through hole 5 is connected to the liquid outlet pipeline, so as to realize one-to-one or one-to-many tissue reagent circulation control; when the second through hole 5 is connected with the liquid inlet pipeline, the first through hole 4 is connected with the liquid outlet pipeline, one-to-one or multi-to-one tissue reagent circulation control is realized, the applicability of multiple scenes of the valve body is further improved, and the use requirements of medical workers are met.

The multi-way valve of the present application requires calibration positioning (coding) thereof in use, i.e. the above steps S2, S2, to perform precise positioning of the plurality of second through holes 5. Referring to fig. 3 and 4, in the process that the motor 2 drives the valve core 6 to rotate, the first sensor 11 senses the alignment portion 10, and the second sensor 13 senses the positioning portion, and when the first sensor 11 and the second sensor 13 sense the alignment portion 10 and the positioning portion at the same time, the motor 2 stops rotating. The four second sensors 13 sequentially arranged are numbered as A/B/C/D, and when the second sensors 13 sense the notch, the sensing signal is "0", and when the second sensors 13 do not sense the notch, the sensing signal is "1". From this, it can be seen that the one-to-one correspondence relationship between the second through holes 5 and the positioning portions is as shown in the following table:

it should be noted that, the above is only for explaining the encoding process of the code wheel 9, and is not limited to the encoding process of the code wheel 9, and other encoding methods may also be adopted to encode the second through hole 5 in accordance with the structure of the code wheel 9 and the position of the sensor, which are not described herein again.

When the valve body is used or is not used, that is, in step S4, the stop portion 16 of the code wheel 9 is used to stop positioning the valve element 6, and when the first sensor 11 senses the stop portion 16, the motor 2 stops rotating, and at this time, the second liquid port 8 of the valve element 6 is disconnected from any second through hole 5 of the valve head 3, so that the phenomena of liquid overflow and liquid leakage caused by misoperation of the tissue reagent are effectively prevented, and the controllability of the valve body is improved.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. The utility model provides a multi-ported valve, includes the support frame and is fixed in the motor of support frame, its characterized in that still includes:

2. The multi-way valve of claim 1, wherein the code wheel is further provided with a positioning portion corresponding to the alignment portion;

3. The multi-way valve as claimed in claim 2, wherein a first ring and a second ring which are coaxial are formed on the top surface of the code disc in a protruding manner, the first ring is located on the inner side of the second ring, the alignment portion is arranged on the first ring, and the positioning portion is arranged on the second ring.

4. The multi-way valve of claim 3, wherein the alignment portion and the positioning portion are notches or protrusions formed on the first ring and the second ring.

5. The multi-way valve of claim 1, wherein said code disc is further provided with a stop portion, said stop portion being located between two adjacent said alignment portions.

6. The multi-way valve of claim 2, wherein the number of second through holes is 12.

7. The multi-way valve of claim 6, wherein the detent includes a first detent, a second detent, and a third detent, the first detent including four first sub-detents arranged in sequence, the second detent spaced two of the detents from the first detent, the third detent spaced one of the detents from the second detent.

8. The multi-way valve of claim 7, comprising a plurality of second sensors, wherein the plurality of second sensors are circumferentially arranged, a circumferential distance between two adjacent second sensors is equal to a distance between two adjacent first sub-positioning portions, and the number of the second sensors is at least four.

9. The multi-way valve of claim 1, wherein the valve head is provided with a heating assembly comprising a heating rod for heating the valve head and a temperature sensor for sensing the temperature of the valve head.

10. Method for using a multi-way valve, applying a multi-way valve according to claims 1 to 9, characterized in that it comprises at least the following steps,