CN219841081U - Valve structure - Google Patents

Abstract

The utility model discloses a valve structure, comprising: a valve body, the interior of which is provided with a valve cavity; the valve body is provided with a first valve port and a plurality of groups of second valve ports, and the first valve port and the second valve ports enable the valve cavity to be communicated with the outside; the valve core is rotatably arranged in the valve cavity, an adapter flow channel is arranged on the valve core, a first opening of the adapter flow channel is communicated with the first valve port, and a second opening of the adapter flow channel is communicated with the second valve port; the plurality of groups of second valve ports are sequentially arranged on the rotating path of the second opening. The valve core in the utility model adopts a rotary design, so that the design size of a valve cavity can be effectively reduced, the external size of a valve body can be correspondingly reduced, the valve core has extremely strong adaptability when being applied in a narrow working space, in addition, the valve core which is rotationally arranged can enable the second valve port to be arranged along the rotation direction, the pipeline can be compactly installed, the installation limit of the pipeline can be effectively reduced, and the space utilization rate can be further improved.

Description

Valve structure

Technical Field

The utility model relates to the field of valves, in particular to a valve structure.

Background

Valves are frequently used in various fields including hydraulic, braking, air conditioning, etc., as one of the important tools for line control. In recent years, both household air conditioners and vehicle air conditioners are actively developed, the output is always in a trend of increasing year by year, the design of pipeline loops is different along with the change of functions in various air conditioners, and valve structures such as a three-way valve, a four-way valve and the like can easily realize the reversing of a plurality of loops, so that the three-way valve, the four-way valve and the like are widely applied to pipeline design.

In the existing valve structure, the translation of the valve core is partially adopted to control different communication of the pipeline, the arrangement position and the direction of the pipeline are limited by the movable form of the valve core, the translation movable stroke of the valve core is longer, and the valve body is required to provide a longer space for matching, so that the structure of the valve body is generally longer, the valve cavity in the valve body is narrower, the flow resistance is larger, and the medium flow in the pipeline is not facilitated.

Disclosure of Invention

The embodiment of the utility model provides a valve structure which can meet the requirements of medium reversing and low flow resistance, and is applicable to a narrow space, and the technical scheme is as follows:

a valve structure comprising: a valve body, the interior of which is provided with a valve cavity; the valve body is provided with a first valve port and a plurality of groups of second valve ports, and the first valve port and the second valve ports enable the valve cavity to be communicated with the outside; the valve core is rotatably arranged in the valve cavity, an adapter flow channel is arranged on the valve core, a first opening of the adapter flow channel is communicated with the first valve port, and a second opening of the adapter flow channel is communicated with the second valve port; the plurality of groups of second valve ports are sequentially arranged on the rotating path of the second opening.

The valve structure of the embodiment of the utility model has at least the following beneficial effects:

the valve structure comprises a valve body and a valve core, wherein an adapter flow channel is formed in the valve core, the valve core is rotatably arranged in a valve cavity of the valve body, the first valve port and any group of second valve ports are communicated through the adapter flow channel, the other second valve ports are communicated through the inner space of the valve cavity or are in a non-circulation state, the reversing of a loop is further realized, the application requirement can be met, the valve core in the valve structure adopts a rotary design, the design size of the valve cavity can be effectively reduced, the outer size of the valve body can be correspondingly reduced, the valve has extremely strong adaptability when the valve is applied in a narrow working space, in addition, the valve core which is rotatably arranged can enable the second valve ports to be arranged along the rotation direction, so that a pipeline is compactly installed, the installation limit of the pipeline is effectively reduced, and the space utilization rate is further improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are needed to be used in the embodiments of the present utility model will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

FIG. 1 is a top cross-sectional view of a valve structure in this embodiment;

FIG. 2 is a side cross-sectional view of the valve structure of the present embodiment;

FIG. 3 is a side cross-sectional view of the valve body in this embodiment;

FIG. 4 is a side cross-sectional view of the valve cartridge of the present embodiment;

FIG. 5 is an enlarged schematic view of A in FIG. 3;

fig. 6 is a schematic cross-sectional view of another drain tank provided in this embodiment;

specific reference numerals are as follows:

1. a valve body; 1.1, a valve cavity; 1.2, a first valve port; 1.21, upper port of the first valve port; 1.3, a second valve port; 1.31, upper port of the second valve port; 1.4, guiding bulges; 1.1a, a rotating groove; 1.1b, the inner bottom surface of the rotary groove; 1.1c, shaft hole; 1.1d, the inner side wall of the rotary groove; 1.1e, drain tank; 1.1g, liquid guiding surface; 2. a valve core; 2.1, switching a runner; 2.1a, a first opening; 2.1b, a second opening; 2.2, driving shaft; 2.3, a guide groove; 3. a seal; 4. a limiting piece;

P ₁ a first switching position; p (P) ₂ A second switching position; p (P) ₃ A third switching position; l, the rotation axis of the valve core.

Detailed Description

Features and exemplary embodiments of various aspects of the present utility model will be described in detail below, and in order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the utility model only and not limiting. It will be apparent to one skilled in the art that the present utility model may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the utility model by showing examples of the utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The valve structure of the prior art adopts a sliding valve core, which leads to oversized overall size of the valve structure and limited pipeline installation.

In order to solve the problems in the prior art, an embodiment of the present utility model provides a valve structure, referring to fig. 1 to 6, including: the valve comprises a valve body 1 and a valve core 2, wherein a valve cavity 1.1 is formed in the valve body 1; the valve body 1 is provided with a first valve port 1.2 and a plurality of groups of second valve ports 1.3 (three groups are illustrated in fig. 1), and the first valve port 1.2 and the second valve port 1.3 enable the valve cavity 1.1 to be communicated with the outside; the valve core 2 is rotatably arranged in the valve cavity 1.1, the valve core 2 is provided with a switching flow channel 2.1, a first opening 2.1a of the switching flow channel 2.1 is communicated with the first valve port 1.2, and a second opening 2.1b of the switching flow channel 2.1 is used for being communicated with any group of second valve ports 1.3; the plurality of groups of second valve ports 1.3 are sequentially arranged on the rotating path of the second opening 2.1b of the switching flow passage 2.1. According to the utility model, through the rotary arrangement of the valve core 2, the first valve port 1.2 and any group of the second valve ports 1.3 can be ensured to be communicated through the switching flow channel 2.1, so that loop switching is realized, the rotary arrangement ensures that the action space required by the valve core 2 is small, the external size of the valve body 1 can be made small so as to adapt to the installation application of a narrow space, and the second valve ports 1.3 which are sequentially arranged along the rotary direction can enable a plurality of groups of pipelines to be compactly installed, so that the limitation of the installation space can be avoided.

Referring to fig. 1 and 2, the external shape of the valve body 1 may be a square body (for example, a cuboid or a cube) or a sphere or other irregular shape, and in this embodiment, the valve body 1 is illustrated by a square body, wherein the valve body 1 with a square shape is provided with a chamfer, and the chamfer is arranged between two adjacent side surfaces (adjacent valve core rotation directions) of the valve body 1. In this embodiment, the second valve ports 1.3 are arranged along the rotation direction of the valve core 2, so that the first valve port 1.2 and the plurality of second valve ports 1.3 are compact, and further, chamfers can be designed at corresponding positions on the outer side of the valve body 1, so that the space occupation of engineering materials and structures is reduced, the first valve port 1.2 and the second valve port 1.3 are compact, and chamfers furthest from the first valve port 1.2 can be formed by adopting a larger angle as far as possible, so that the space and materials are further saved.

Referring to fig. 1 and 2, a valve cavity 1.1 is arranged in the valve body 1, and the valve cavity 1.1 is required to meet the rotation requirement of the valve core 2. A transition space for medium circulation is formed between the inner wall of the valve cavity 1.1 and the periphery of the valve core 2, when the first valve port 1.2 and any one group of second valve ports 1.3 are communicated through the switching flow channel 2.1, the other two groups of second valve ports 1.3 can be communicated through the transition space (if the number of the second valve ports 1.3 is two, the other group of second valve ports 1.3 are in an inactive state, namely, the medium of the first valve port 1.2 does not circulate to the second valve port 1.3).

In the direction of the axis of rotation of the valve element (the axis of rotation of the valve element is shown as L in fig. 2), the area of any cross section of the transition space is larger than the area of any cross section of the first valve port 1.2 or the second valve port 1.3, wherein any cross section of the transition space and any cross section of the first valve port 1.2 and the second valve port 1.3 are perpendicular to the direction of the axis of rotation of the valve element. The transition space can be understood as: after the valve core 2 is installed, the residual space inside the valve cavity 1.1 is the transition space, and in the embodiment, the excess flow of the medium can be improved inside the valve cavity 1.1 by setting the area of any section of the transition space to be larger than any section area of the first valve port 1.2 and larger than any section area of the second valve port 1.3, so that the resistance of the medium passing through the valve structure is reduced, and the resistance consumption of the medium in the pipeline is reduced. Medium, which refers to a substance that needs to pass through a valve structure, includes, but is not limited to, liquids (e.g., water), fluids, and the like.

Referring to fig. 2 and 3, the first valve port 1.2 is disposed through one side wall of the valve body 1, and the upper port 1.21 of the first valve port is communicated into the valve cavity 1.1, and the lower end of the first valve port 1.2 extends out of the valve body 1 along the axial direction of the lower end to form a part of structure which can be used for communicating with an external pipeline. Wherein the upper port 1.21 of the first valve port is used for communicating with the first opening 2.1a of the switching flow passage 2.1 of the valve core 2.

Optionally, the first opening 2.1a of the adapting flow channel 2.1 covers the upper port 1.21 of the first valve port, so that the medium entering from the first valve port 1.2 can enter the adapting flow channel 2.1 of the valve core 2 without leakage, and the medium in the adapting flow channel 2.1 can enter the first valve port 1.2 without leakage.

The inner diameter of the first opening 2.1a of the adapting flow channel 2.1 is larger than or equal to the inner diameter of the upper port of the first valve port (the same is illustrated in fig. 2), the first opening 2.1a of the adapting flow channel 2.1 is coaxially arranged with the upper port 1.21 of the first valve port, and in this embodiment, the first opening 2.1a of the adapting flow channel 2.1, the upper port 1.21 of the first valve port and the rotation axis of the valve core 2 are collinear.

In some embodiments, the inner diameter of the first opening 2.1a of the adapting flow channel 2.1 is larger than the inner diameter of the upper port 1.21 of the first valve port, so that after the valve core 2 rotates to generate fine offset, the first opening 2.1a of the adapting flow channel 2.1 can still completely cover the upper port of the first valve port 1.2, so as to ensure no leakage circulation of the medium.

As shown in fig. 2 to 4, the second opening 2.1b of the adapting flow channel 2.1 covers the upper port 1.31 of the second valve port, so that the medium in the adapting flow channel 2.1 can enter the second valve port 1.3 without leakage. The inner diameter of the second opening 2.1b of the adapting flow channel 2.1 is larger than or equal to the inner diameter of the upper port of the second valve port 1.3 (the second opening is equal in fig. 2), when the second opening 2.1b of the adapting flow channel 2.1 rotates to be communicated with a group of second valve ports 1.3, the second opening 2.1b of the adapting flow channel 2.1 coaxially corresponds to the upper port 1.31 of the second valve port 1.3, and the second opening 2.1b completely covers the upper port of the second valve port 1.3.

In some embodiments, the inner diameter of the second opening 2.1b of the adapting flow channel 2.1 is larger than the inner diameter of the upper port of the second valve port 1.3, so that errors generated by rotation of the valve core 2 can be compensated, and the second opening 2.1b of the adapting flow channel 2.1 can completely cover the upper port 1.31 of the second valve port 1.3 after rotating in place.

Alternatively, referring to fig. 2, the axes of the first port 1.2 and the second port 1.3 are parallel to each other, so that multiple groups of pipes can be installed in the same direction (multiple groups of pipes are used for respectively communicating the lower ports of the first port 1.2 and the second port 1.3), and the axes of the first port 1.2 and the second port 1.3 are all straight lines and parallel to the rotation axis of the valve core 2.

Optionally, the first valve port 1.2 and the second valve port 1.3 are all vertically penetrating through one side wall of the valve body 1, for example, the first valve port 1.2 and the second valve port 1.3 are all vertically penetrating through the same side wall (for example, the lower side wall) of the valve body 1, so that multiple groups of pipes can be installed on the same side of the valve body 1, the installation limit of the pipes is further reduced, and the installation space can be saved.

The number of the second valve ports 1.3 may be multiple groups, for example, two groups or three groups, and multiple groups of the second valve ports 1.3 are sequentially arranged on the rotating path of the valve core 2, that is, the upper ports 1.31 of multiple groups of the second valve ports 1.3 are sequentially arranged on the rotating path of the second opening 2.1b, so that the second opening 2.1b of the switching flow channel 2.1 can be communicated with the upper ports 1.31 of any group of the second valve ports 1.3. Optionally, the multiple groups of second valve ports 1.3 are sequentially arranged around the axis of the first valve port 1.2.

When the number of the second valve ports 1.3 is two, the valve structure in this embodiment has the function of a two-position three-way valve, that is, the second opening 2.1b of the valve core 2 can be arbitrarily selected to be communicated with one group of the second valve ports 1.3, medium in the pipeline can circulate between the first valve port 1.2, the switching flow passage 2.1 of the valve core 2 and the second valve port 1.3, and the other group of the second valve ports 1.3 is kept communicated with the interior of the valve cavity 1.1, and the medium in the first valve port 1.2 does not pass through the second valve port 1.3.

When the number of the second valve ports 1.3 is three, referring to fig. 1 and 2, the valve structure in this embodiment has the function of a three-position four-way valve, that is, the second opening 2.1b of the valve core 2 can be arbitrarily selected to be communicated with one group of the second valve ports 1.3, media in the pipeline can circulate between the first valve port 1.2, the switching flow channel 2.1 of the valve core 2 and the second valve ports 1.3, and a transition space formed by the valve core 2 and the valve cavity 1.1 is used as a transfer space between the other two groups of the second valve ports 1.3, so that the other two groups of the second valve ports 1.3 are communicated, and media in the pipeline can circulate between the two groups of the second valve ports 1.3 and the transition space. In addition, the area of any section of the transition space on the rotation axis of the valve core is larger than the area of the sections of the first valve port 1.2 and the second valve port 1.3, so that the resistance of the medium passing through the transition space can be reduced, and the smooth medium circulation is ensured.

Taking the number of the second valve ports 1.3 as three groups for example, as shown in fig. 1 and 2, fig. 1 illustrates a state when the valve element is in the first switching position:

when in the first switching position, see P of FIG. 1 ₁ The first valve port 1.2 is communicated with the first group of second valve ports 1.3 through a switching flow passage 2.1 in the valve core 2, and the other two groups of second valve ports 1.3 are communicated through a transition space in the valve cavity 1.1;

when in the second switching position, see P of FIG. 1 ₂ The first valve port 1.2 and the second valve port 1.3 are communicated through a switching flow passage 2.1 in the valve core 2; the other two groups of second valve ports 1.3 are communicated through a transition space in the valve cavity 1.1;

when in the third switching position, see P of FIG. 1 ₃ The first valve port 1.2 and the third group of second valve ports 1.3 are communicated through a switching flow passage 2.1 in the valve core 2; the other two groups of second valve ports 1.3 are communicated with each other through a transition space inside the valve cavity 1.1.

Referring to fig. 2 and 3, a rotary groove 1.1a is formed on the inner wall of the valve cavity 1.1, for example, the rotary groove 1.1a is formed on the lower side wall of the valve cavity 1.1 (i.e. the rotary groove is formed by concave shape of the lower side wall of the valve cavity); the valve core 2 can be rotatably arranged in the rotary groove 1.1a, and the rotary groove can provide a mounting position for the rotation of the valve core so as to ensure the stability of the valve core 2 in the valve cavity 1.1.

Referring to fig. 2 and 3, one side of the valve core 2 (for example, the lower side of the valve core) can be in contact with the inner bottom surface 1.1b of the rotary groove, and a contact pressure (which can be overcome when the valve core rotates) is provided between one side of the valve core 2 and the inner bottom surface 1.1b of the rotary groove, in this embodiment, by providing a contact pressure between the lower side of the valve core 2 and the inner bottom surface 1.1b of the rotary groove, leakage of the medium from the position of the mating surface is avoided. Optionally, the profile of the rotary groove 1.1a in the axial view (i.e. the direction of the spool rotation axis) is in the shape of a sector, which helps to match the space required for the spool 2 to rotate, so as to keep the spool 2 stable. In addition to this, the shape of the rotating groove 1.1a may be set to other shapes, such as square, circular, etc., according to actual needs.

The valve body 1 is provided with a shaft hole 1.1c (such as a stepped shaft hole) communicated with the valve cavity 1.1; the valve core 2 is provided with a driving shaft 2.2, the driving shaft 2.2 is arranged through the shaft hole 1.1c, for example, the driving shaft 2.2 passes through the shaft hole 1.1c along the axial direction (namely the rotation axis direction of the valve core), and part of the structure extends outwards from the driving shaft 2.2. An external drive device (not shown) can be connected directly or indirectly to the drive shaft 2.2, and thus drive the valve element 2 to rotate about the axis of the drive shaft 2.2. The external driving device herein includes, but is not limited to, a motor, a rotary cylinder, and the like.

Optionally, referring to fig. 2, a sealing member 3 (such as a sealing sleeve) is sleeved on the periphery of the driving shaft 2.2, and the sealing member 3 can seal a gap between the driving shaft 2.2 and the shaft hole 1.1c, so as to prevent external impurities from entering the valve cavity 1.1 or prevent medium inside the valve cavity 1.1 from leaking from the position.

The contact pressure is formed between one side of the valve core 2 and the inner bottom surface 1.1b of the rotary groove, and the contact pressure can be formed by self weight of the valve core 2, or can be applied to the valve core 2 by providing other components to apply pressure towards the inner bottom surface of the rotary groove 1.1a, for example, the sealing element 3 sleeved on the periphery of the driving shaft 2.2 has elastic deformation capability, the sealing element 3 is arranged between the valve body 1 and the valve core 2, the elastic force direction of the elastic element is consistent with the axial direction of the driving shaft 2.2, and the pressure in the axial direction (the axial direction of the driving shaft 2.2) is set for the valve core 2 by providing the deformable sealing element 3, so that the contact pressure is formed between the lower side of the valve core 2 and the inner bottom surface 1.1b of the rotary groove. Alternatively, the sealing member 3 is made of rubber, sponge or other materials with deformability.

Alternatively, the driving shaft 2.2 takes the form of a stepped shaft, and the shaft hole 1.1c on the valve body 1 is a stepped shaft hole matched with the stepped shaft, a first step surface formed by the stepped shaft and a second step surface formed by the stepped shaft hole can provide a supporting position for the sealing element 3, for example, the sealing element 3 is arranged between the first step surface and the second step surface, and the upper end surface and the lower end surface of the sealing element 3 respectively prop against the first step surface and the second step surface. The small inner diameter section of the sealing member 3 having an inner diameter larger than the shaft hole 1.1c (stepped shaft hole) can prevent the sealing member 3 from being separated outwardly along the shaft hole 1.1 c.

Optionally, referring to fig. 2 and 3, the upper port 1.21 of the first valve port 1.2 and the upper port 1.31 of the second valve port 1.3 are both opened on the inner bottom surface 1.1b of the rotary groove, the opening end surfaces at two ends of the adapting flow channel 2.1 (i.e. the first opening 2.1a and the second opening 2.1 b) are both planes, the matching parts between the inner bottom surface of the rotary groove and the opening end surfaces at two ends of the adapting flow channel 2.1 are also set as planes, and the two planes are tightly attached to each other, so that the rotation of the interference valve core 2 can be avoided, and meanwhile, the medium leakage can be avoided.

Alternatively, the valve element 2 has a portion made of a self-lubricating material, one side of which is configured as a side of the valve element 2 that contacts the inner bottom surface 1.1b of the rotary groove. For example, the lower side portion of the valve body 2 is made of a self-lubricating material, and the lower side surface of the lower side portion is configured as a side surface that contacts the inner bottom surface 1.1b of the rotary groove 1.1 a. Alternatively, the valve core 2 may be integrally made of a self-lubricating material, which is not limited in this embodiment.

The self-lubricating material can be copper, plastic with self-lubricating property, carbon fiber and the like. In this embodiment, the valve core 2 is in contact with the inner bottom surface 1.1b of the rotary groove by adopting a self-lubricating material, so as to increase smoothness of the valve core 2 during rotation, and sliding fit between the valve core 2 and the inner bottom surface of the rotary groove can be realized.

Optionally, a guiding protrusion 1.4 and a guiding groove 2.3 are arranged between the valve cavity 1.1 and the valve core 2, the length directions of the guiding protrusion 1.4 and the guiding groove 2.3 are set along the rotation direction of the valve core 2, and in this embodiment, the valve core 2 can ensure the stability during rotation and the accuracy of the rotation path through the matching of the guiding protrusion 1.4 and the guiding groove 2.3.

Referring to fig. 2 to 4, the arrangement modes of the guide protrusion 1.4 and the guide groove 2.3 may be various, so long as the requirement of the rotation guide of the valve core 2 is met, for example, the guide groove 2.3 is arranged on the lower side surface of the valve core 2 (i.e. one side surface of the valve core close to the inner bottom surface of the rotary groove), the guide protrusion 1.4 is arranged on the inner bottom surface 1.1b of the rotary groove, the guide protrusion 1.4 is positioned in the guide groove 2.3, and the rotation guide of the valve core 2 can be realized. In addition, a guide protrusion 1.4 may be disposed on a side of the valve core 2 away from the inner bottom surface of the rotary groove 1.1a, a guide groove 2.3 may be disposed on the inner wall of the valve cavity 1.1, and the rotary guide of the valve core 2 may be achieved by cooperation of the guide protrusion 1.4 and the guide groove 2.3.

The inner side wall 1.1d of the rotary tank is provided with a pressure discharging part which can be used for transferring the medium between the inner side wall of the rotary tank and the valve core 2. For example, the pressure discharge portion may be used to discharge the medium in the rotary groove 1.1a from the designated switching position when the valve element 2 rotates, preventing the medium from occupying the inner space when the valve element 2 is in the first switching position or the third switching position, and further preventing the valve element 2 and the second valve port 1.3 from communicating accurately. The inner space is the space between the inner side wall 1.1d of the rotary groove and the valve element 2 in the rotation direction of the valve element.

Referring to fig. 3, 5 and 6, the pressure discharge portion includes a drain groove 1.1e opened on an inner sidewall of the rotary groove in a circumferential direction of the rotary groove 1.1a, when the valve body 2 is switched to the first or third switching position, the valve body 2 pushes medium of an inner space into the drain groove 1.1e, and the medium in the drain groove 1.1e may slide out of one side (one side in a rotation direction) of the valve body 2 along the drain groove 1.1e, so as to prevent the medium from being present between the valve body 2 and the inner sidewall 1.1d of the rotary groove when the valve body 2 is rotated to be close to the inner sidewall 1.1d of the rotary groove, resulting in pressure between the valve body 2 and the inner sidewall 1.1d of the rotary groove, thereby causing the valve body 2 to be unable to accurately communicate with the first group of the second valve ports or the third group of the second valve ports.

Alternatively, referring to fig. 3 and 5, in the direction of the spool rotation axis, the side wall of the drain groove 1.1e near the inner bottom surface of the rotating groove 1.1a is inclined toward the inner bottom surface 1.1b of the rotating groove to form the liquid guiding surface 1.1g, and the angle of inclination of the liquid guiding surface 1.1g may be 5 ° to 30 °, for example, the angle of inclination of the liquid guiding surface 1.1g with the inner bottom surface of the rotating groove 1.1a is 20 ° to 30 °. In this embodiment, by obliquely setting the side wall of the drain tank 1.1e, the drain tank 1.1e can be facilitated to drain the medium inside the drain tank into the rotary tank 1.1a, so that the internal space of the drain tank 1.1e is prevented from being occupied by the medium when the valve core 2 rotates to the first switching position or the third switching position, and the valve core 2 cannot push the medium in the rotary tank 1.1a into the drain tank 1.1e, so that the pressure cannot be drained. Alternatively, referring to fig. 5 and 6, the cross-sectional shape of the drain tank 1.1e is V-shaped or trapezoidal.

In some other embodiments, the drain groove 1.1e may also be formed on the outer side wall of the valve core 2, where the drain groove 1.1e is formed in a direction consistent with the circumferential direction of the valve core 2.

In addition, the pressure discharge portion may adopt a liquid discharge hole (not shown) formed in the wall thickness portion of the valve body 1 (i.e., formed in the side wall of the valve body 1), both ends of the liquid discharge hole may be connected to the inner side wall 1.1d of the rotary groove, and alternatively, both ends of the liquid discharge hole may be opened to both side walls of the rotary groove 1.1a in the rotation direction (the valve element rotation direction), respectively.

The valve structure further comprises a limiting piece 4 connected in the valve cavity 1.1, the limiting piece 4 can compress part of the structure of the valve core 2 in the rotary groove 1.1a to ensure the stability of the structure, for example, in the direction of the rotation axis of the valve core, the limiting piece 4 is arranged on one side of the valve core 2, which is away from the first valve port 1.2, and the limiting piece 4 can prop against the periphery of the valve core 2 (for example, the upper side of the valve core 2) to realize the positioning of the valve core 2 in the direction of the rotation axis.

Optionally, the limiting part 4 comprises a pressing ring, the pressing ring is connected in the valve cavity 1.1 through a screw or other existing modes, the lower end face of the pressing ring is propped against the valve core 2, and further limiting of the valve core 2 is achieved, and optionally, a step part for installing the pressing ring is arranged in the valve cavity 1.1. In addition, the stopper 4 may be a pressing member having deformability, such as a rubber block, which abuts against the side of the valve body 2 facing away from the rotary groove 1.1 a.

The number of the second valve ports 1.3 in the embodiment may be multiple groups, and the valve structure in the embodiment is schematically illustrated by the number of the second valve ports 1.3 of three groups:

when the spool 2 is in the first switching position, see P of fig. 1 ₁ The first valve port 1.2 is communicated with a first opening 2.1a of the switching flow channel 2.1, and a second opening 2.1b of the switching flow channel 2.1 is communicated with a first group of second valve ports 1.3 to form a first flow channel for medium circulation; the rest second valve ports 1.3 of the second group and the third valve ports 1.3 of the third group are communicated through a transition space in the valve cavity 1.1 to form a second flow passage for medium circulation;

when the spool 2 is in the second switching position, see P of fig. 1 ₂ The first valve port 1.2 is communicated with a first opening 2.1a of the switching flow channel 2.1, and a second opening 2.1b of the switching flow channel 2.1 is communicated with a second group of second valve ports 1.3, so that a third flow channel for medium circulation is formed; the rest first group of second valve ports 1.3 and the rest third group of second valve ports 1.3 are communicated through a transition space inside the valve cavity 1.1 to form a fourth circulation channel for medium circulation;

when the spool 2 is in the third switching position, see P of fig. 1 ₃ The first valve port 1.2 is communicated with a first opening 2.1a of the switching flow channel 2.1, and a second opening 2.1b of the switching flow channel 2.1 is communicated with a third group of second valve ports 1.3 to form a fifth flow channel for medium flow; the rest first group of second valve ports 1.3 and the rest second group of second valve ports 1.3 are communicated through a transition space inside the valve cavity 1.1 to form a sixth circulation channel for medium circulation.

In the foregoing, only the specific embodiments of the present utility model are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present utility model is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present utility model, and they should be included in the scope of the present utility model.

Claims (11)

1. A valve structure, comprising:

a valve body (1), wherein a valve cavity (1.1) is arranged in the valve body (1); the valve body (1) is provided with a first valve port (1.2) and a plurality of groups of second valve ports (1.3), and the first valve port (1.2) and the second valve port (1.3) enable the valve cavity (1.1) to be communicated with the outside;

the valve core (2) is rotatably arranged in the valve cavity (1.1), the valve core (2) is provided with a switching flow passage (2.1), a first opening (2.1 a) of the switching flow passage (2.1) is communicated with the first valve port (1.2), and a second opening (2.1 b) of the switching flow passage (2.1) is communicated with the second valve port (1.3); the plurality of groups of second valve ports (1.3) are sequentially arranged on the rotating path of the second opening (2.1 b).

2. A valve structure according to claim 1, characterized in that the axis of rotation of the valve core is collinear with the axis of the first valve port (1.2), the axes of the first valve port (1.2) and the second valve port (1.3) being parallel to each other.

3. A valve structure according to claim 2, characterized in that the first valve port (1.2) and the second valve port (1.3) are all open through on the same side wall of the valve body (1).

4. Valve structure according to claim 1, characterized in that a transition space for medium flow is formed between the valve chamber (1.1) and the outer periphery of the valve core (2); in the direction of the rotation axis of the valve core, the area of any section of the transition space is larger than the area of any section of the first valve port (1.2) or the second valve port (1.3).

5. Valve structure according to any one of claims 1-4, characterized in that a rotary groove (1.1 a) is provided in the valve chamber (1.1), the valve cartridge (2) being rotatably arranged in the rotary groove (1.1 a); the first valve port (1.2) and the second valve port (1.3) are both arranged on the inner bottom surface (1.1 b) of the rotary groove.

6. Valve structure according to claim 5, characterized in that the valve core (2) has a portion made of self-lubricating material, one side of which is configured as the side of the valve core (2) in contact with the inner bottom surface (1.1 b) of the rotary groove.

7. Valve structure according to claim 5, characterized in that the valve body (1) is provided with a shaft hole (1.1 c) communicating with the valve cavity; the valve core (2) is provided with a driving shaft (2.2), and the driving shaft (2.2) penetrates through the shaft hole (1.1 c).

8. The valve structure according to claim 7, further comprising a seal member (3) fitted around the outer periphery of the drive shaft (2.2), the seal member (3) having a pressure on the valve spool (2) in the direction of the rotational axis of the valve spool.

9. A valve structure according to claim 5, characterized in that a pressure discharge portion is provided on the inner side wall (1.1 d) of the rotary tank for transferring the medium between the inner side wall of the rotary tank and the valve spool (2), the pressure discharge portion comprising a water discharge tank (1.1 e) provided on the inner side wall of the rotary tank in the circumferential direction of the rotary tank (1.1 a), the side wall of the water discharge tank (1.1 e) near the inner bottom surface of the rotary tank being provided as a liquid guiding surface (1.1 g) inclined toward the inner bottom surface of the rotary tank.

10. Valve structure according to claim 1, further comprising a stop (4) connected in the valve chamber (1.1); in the direction of the rotation axis of the valve core, the limiting piece (4) is positioned at one side of the valve core (2) deviating from the first valve port (1.2) and is propped against the valve core (2).

11. Valve structure according to claim 1, characterized in that a guiding projection (1.4) and a guiding groove (2.3) are provided between the valve chamber (1.1) and the valve core (2), which guiding projection (1.4) and guiding groove (2.3) are arranged in the direction of rotation of the valve core (2) in the length direction.