CN108799532B

CN108799532B - Valve device

Info

Publication number: CN108799532B
Application number: CN201710292453.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2020-12-01
Anticipated expiration: 2037-04-28
Also published as: CN108799532A

Abstract

The invention discloses a valve device and a sliding block thereof, wherein the sliding block is provided with a flow passage part and a plugging part which are circumferentially arranged around a rotation center of the sliding block; the runner part is communicated with the top side and the bottom side of the sliding block, and the flow areas of the runner part are different along the circumferential direction; the sliding block is also provided with a connecting part matched with a driving part of the valve device, so that the sliding block can rotate under the driving of the driving part. The structural design of the sliding block enables the valve device to realize flow regulation, and flow deviation can be controlled in a small range, so that the flow precision control requirement of a refrigerator and a similar small-sized refrigerating system is met.

Description

Valve device

Technical Field

The invention relates to the technical field of fluid control components, in particular to a valve device for flow regulation and a sliding block thereof.

Background

For refrigerators and similar small refrigeration systems, at the present stage, a capillary tube is mostly adopted for throttling, but the capillary tube does not have the function of flow regulation, so that the refrigeration system cannot achieve the optimal operation condition under different environment regulation conditions, and the influence on the energy efficiency is large.

The electronic expansion valve for the air conditioner is applied to a refrigerator and a similar small refrigeration system to achieve the function of flow regulation, but the structure of the electronic expansion valve for the air conditioner cannot meet the requirement of flow control accuracy of the refrigerator and the similar small refrigeration system due to different system requirements.

In addition, for a refrigeration system requiring forward and reverse control, the flow characteristics provided by the conventional electronic expansion valve in the forward direction and the reverse direction are basically the same, but in practical application, refrigeration defrosting, refrigeration and heating exist, and because the lengths of the actually arranged paths are different, the performance of the system is affected by the same flow control characteristics for refrigeration and heating.

Therefore, how to design a valve device capable of realizing flow regulation and high flow precision control is a technical problem to be solved by those skilled in the art at present.

Disclosure of Invention

The invention aims to provide a valve device and a sliding block thereof, wherein the sliding block has a structural design which enables the valve device to realize flow regulation and control flow deviation in a small range so as to meet the flow precision control requirement of a refrigerator and a similar small-sized refrigerating system.

In order to solve the above technical problem, the present invention provides a slider for a valve device, the slider having a flow path portion and a blocking portion circumferentially arranged around a rotation center thereof; the runner part is communicated with the top side and the bottom side of the sliding block, and the flow areas of the runner part are different along the circumferential direction; the sliding block is also provided with a connecting part matched with a driving part of the valve device, so that the sliding block can rotate under the driving of the driving part.

The slider of the valve device is used for realizing flow regulation of the valve device, and particularly, a flow channel part and a blocking part are arranged on the slider along the circumferential direction, the flow channel part is communicated with the top side and the bottom side of the slider, and a connecting part matched with a driving part of the valve device is arranged on the slider so that the slider can rotate under the driving of the driving part; when the valve device works, the slide block enables the flow passage part to be communicated with the valve port of the valve device through rotation, so that the inlet and the outlet of the valve device are communicated, or the blocking part of the slide block closes the valve port of the valve device, so that the inlet and the outlet of the valve device are isolated, and thus the inlet and the outlet of the valve device are communicated or isolated through rotation of the slide block, so that the valve device has a full-closing function; meanwhile, the flow area of the runner part of the sliding block along the circumferential direction is different, so that different positions of the runner part are communicated with a valve port of the valve device through the rotation of the sliding block, the flow is adjusted, and the flow area of the runner part along the circumferential direction is easy to set and adjust and can be set smaller according to system requirements, so that the flow deviation is easy to control within a smaller range, such as within 5%, through the setting of the flow area of the runner part of the sliding block, and the flow control precision requirement of a refrigerator and a similar small refrigeration system is met.

The runner portion includes a plurality of runner holes that the aperture is not totally the same, and is a plurality of the runner hole distributes and is the arcuation.

The bottom surface of the sliding block is provided with a plurality of inner grooves which correspond to the positions of the plurality of flow passage holes respectively, and the size of each inner groove is larger than that of the corresponding flow passage hole.

The aperture of the plurality of flow passage holes increases gradually along the circumferential direction.

The runner part is an arc-shaped continuous variable cross-section through hole.

The runner part comprises a circulation hole and an arc-shaped continuous variable cross-section groove, the variable cross-section groove is arranged on the bottom surface of the sliding block, and the circulation hole penetrates through the sliding block and is communicated with the variable cross-section groove.

The flow area of the flow hole is not smaller than the maximum flow area of the variable cross-section groove.

The flow area of the variable cross-section groove increases gradually along the circumferential direction, and the flow hole is positioned at one end with the largest flow area of the variable cross-section groove.

The groove wall on one side of the variable cross-section groove is an arc line, and the groove wall on the other side of the variable cross-section groove is an Archimedes spiral; or the groove walls on the two sides of the variable cross-section groove are all in Archimedes spiral.

The invention also provides a valve device, which comprises a driving part, a valve body part and two sliding blocks in any one of the above manners;

the valve body component comprises two valve seats respectively matched with the two sliding blocks, the top surfaces of the two valve seats are respectively provided with a valve port, and the two valve ports are respectively communicated with the two interfaces;

the two elastic pieces are used for respectively pressing the two sliding blocks against the top surfaces of the two valve seats; the sliding block can also move up and down relative to the valve seat;

the driving component can drive the sliding block to rotate relative to the corresponding valve seat, so that the flow channel part of the sliding block is communicated with the valve port of the corresponding valve seat, or the blocking part of the sliding block is closed to the valve port of the corresponding valve seat.

The valve device has the slider structure and also has the same technical effects as the slider. In addition, the valve device is provided with two sliding blocks and two valve seats which are respectively matched, the top surface of each valve seat is provided with a valve port, the two valve ports are respectively communicated with two ports, and the two sliding blocks are respectively pressed against the top surfaces of the valve seats through two elastic pieces; when the valve works, the refrigerant flowing in from one interface can push one of the slide blocks away from one valve seat matched with the slide block, and the other slide block is driven to rotate relative to the other valve seat through the driving part, so that the flow channel part of the other slide block is communicated with the valve port of the other valve seat, and the refrigerant flows out of the other interface through the other valve port; in this way, the valve device can realize forward and reverse circulation, and the flow characteristics in the forward and reverse circulation are determined by the structures of the flow channel parts of the two sliding blocks respectively, namely, different flow control characteristics in the forward and reverse directions can be realized by different designs of the flow channel parts on the two sliding blocks.

The driving part comprises a magnetic rotor and a rotating wheel fixedly arranged on the magnetic rotor, and the rotating wheel is provided with an outer engaging tooth; both the sliding blocks are provided with outer gear parts meshed with the outer gear teeth; the magnetic rotor can drive the rotating wheel to rotate so as to drive the two sliding blocks to synchronously rotate; the outer gear portion forms the connecting portion.

The invention also provides a valve device, which comprises a driving part, a valve seat part and the slide block of any one of the above parts;

the top surface of the valve seat component is provided with a valve port communicated with the inlet and the outlet; the bottom surface of the sliding block is attached to the top surface of the valve seat component;

the driving component can drive the slide block to rotate relative to the valve seat component, so that the runner part is communicated with the valve port, or the blocking part closes the valve port.

Since the valve device has the slider structure, the technical effect same as that of the slider is achieved, and the description is omitted.

Drawings

Fig. 1 is a schematic cross-sectional view illustrating a refrigerant flowing from a first port to a second port of a valve device according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view illustrating a refrigerant flowing from a second port to a first port of a valve device according to an embodiment of the present invention;

FIG. 3 is a schematic view of an angle structure of a slider according to a first embodiment of the present invention;

FIG. 4 is a schematic view of another angle structure of the slider according to the first embodiment of the present invention;

FIG. 5 is a top view of the slider shown in FIG. 3;

FIG. 6 is a bottom view of the slider shown in FIG. 3;

FIG. 7 is a schematic diagram of the construction of the valve housing, valve seat, adapter tube and central shaft of the embodiment;

FIG. 8 is a cross-sectional view of the structure shown in FIG. 7;

FIG. 9 is a schematic view of the valve housing of FIG. 7;

FIG. 10 is a top view of the valve housing of FIG. 9;

FIG. 11 is a schematic view of the valve seat of FIG. 7;

FIG. 12 is a top view of the valve seat of FIG. 11;

FIG. 13 is a schematic cross-sectional view taken along line A-A of FIG. 12;

FIG. 14 is a schematic illustration of the construction of a valve cover according to an exemplary embodiment;

FIG. 15 is a bottom view of the valve cover of FIG. 14;

FIG. 16 is a cross-sectional schematic view of the valve cover of FIG. 14;

FIG. 17 is a schematic view of the structure of the magnetic rotor and the rotating wheel in the embodiment;

FIG. 18 is a cross-sectional view of the structure shown in FIG. 17;

FIG. 19 is a schematic view of the structure of the magnetic rotor of FIG. 17;

FIG. 20 is a schematic view of the structure of the rotating wheel of FIG. 17;

FIG. 21 is a bottom plan view of the engaged engagement of the slider block and the rotatable wheel in accordance with an exemplary embodiment;

FIG. 22 is an angular schematic view of a slider according to a second embodiment of the present invention;

FIG. 23 is a schematic view of another angle structure of a slider according to a second embodiment of the present invention;

FIG. 24 is a top view of the slider shown in FIG. 22;

FIG. 25 is a bottom view of the slider shown in FIG. 22;

fig. 26 is a schematic cross-sectional view of a valve device according to another embodiment of the present invention.

In fig. 1-26:

the magnetic rotor 11, the cylinder wall part 111, the bottom wall part 112, the insertion hole 1121, the balance hole 1122, the rotating wheel 12, the outer tooth 121, the annular groove 122, the central through hole 123;

the valve body component 20, the valve housing 21, the mounting hole 211, the valve seat 22, the first valve seat 22a, the second valve seat 22b, the first plane 221a, the second plane 221b, the first valve port 222a, the second valve port 222b, the first port 223a, the second port 223b, the blind hole 224 and the step surface 225;

the valve cover 23, the first rotating shaft 231a, the second rotating shaft 231b, the boss 232 and the leg portion 233;

a slider 31, a first slider 31a, a second slider 31b, a flow hole 311, a variable cross-section groove 312, a concave cavity 313, a convex portion 314, an external gear portion 315, a cylindrical portion 316;

the slider 31 ', the flow channel hole 311 ', the inner groove 312 ';

a first elastic member 40a, a second elastic member 40b, a housing 50, a center shaft 60, a first connection pipe 70a, a second connection pipe 70 b;

a magnetic rotor 11 ', a rotating shaft 12',

valve body component 20 ', inlet 201', outlet 202 ', valve port 203';

slider 31 ", pretension spring 40'.

Detailed Description

The core of the invention is to provide a valve device and a sliding block thereof, the structural design of the sliding block enables the valve device to realize flow regulation, and can control flow deviation in a small range so as to meet the flow precision control requirement of a refrigerator and a similar small-sized refrigeration system.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

For ease of understanding and explanation, the following description is made in conjunction with the valve device and its slider, and the beneficial effects will not be repeated.

Referring to fig. 1-2, fig. 1 is a schematic cross-sectional view illustrating a refrigerant flowing from a first port to a second port of a valve device according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view illustrating a refrigerant flowing from the second port to the first port of the valve device according to an embodiment of the present invention.

In this embodiment, the valve device includes a drive member and a valve body member 20; the valve body component 20 has a first plane 221a and a second plane 221b, the first plane 221a is provided with a first port 222a, the second plane 221b is provided with a second port 222b, the first port 222a is communicated with the first port 223a, and the second port 222b is communicated with the second port 223 b; the first and

second ports

223a and 223b are connected to the first and

second adapters

70a and 70b, respectively.

The valve device further comprises a slider member comprising two sliders 31 cooperating with the first plane 221a and the second plane 221b, respectively.

Both the sliders 31 have a flow path portion and a blocking portion circumferentially arranged around the respective rotation centers, wherein the flow path portion communicates the top and bottom sides of the slider 31, that is, the flow path portion penetrates the slider 31; thus, the flow path portion of the slider 31 communicates with the valve chamber of the valve body member 20, and the flow area of the flow path portion differs in the circumferential direction.

The two sliding blocks 31 are respectively matched with the corresponding planes through a first elastic piece 40a and a second elastic piece 40b, and specifically, the elastic pieces have pre-tightening forces for pressing the sliding blocks 31 against the corresponding planes.

The slider 31 has a connecting portion engaged with the driving member, so that the slider 31 can rotate relative to the corresponding plane under the driving of the driving member, so that the flow channel portion communicates with the valve port of the corresponding plane, or the blocking portion closes the valve port of the corresponding plane.

For convenience of description, the two sliders 31 will be referred to as a first slider 31a and a second slider 31b corresponding to the first elastic member 40a and the second elastic member 40b, and the first plane 221a and the second plane 221b, respectively, when referring to the fitting relationship of the respective components.

The working process of the valve device is as follows:

as shown in fig. 2, when the refrigerant flows in from the first connection pipe 70a, the refrigerant pushes the first slider 31a upward through the first valve port 222a to overcome the pre-tightening force of the first elastic member 40a, so as to push the first slider 31a away from the first plane 221a, and the refrigerant can flow into the valve chamber through the first valve port 222a, at this time, under the action of the refrigerant in the valve chamber and the pre-tightening force of the second elastic member 40b, the second slider 31b presses against the second plane 221b, and the second slider 31b rotates relative to the second plane 221b under the driving of the driving member, so as to communicate the flow channel portion of the second slider 31b with the second valve port 222b, and the refrigerant flows out from the second connection pipe 70b through the second valve port 222b, or the blocking portion of the second slider 31b closes the second valve port 222 b.

Since the flow area of the flow path portion in the circumferential direction is different, the rotation of the second slider 31b allows different portions of the flow path portion to communicate with the second valve port 222b, thereby adjusting the refrigerant flow rate.

As shown in fig. 3, when the refrigerant flows in from the second connection pipe 70b, the refrigerant pushes the second slider 31b upward through the second valve port 222b to overcome the pre-tightening force of the second elastic member 40b, so as to push the second slider 31b away from the second plane 221b, and the refrigerant can flow into the valve chamber through the second valve port 222b, at this time, under the action of the refrigerant in the valve chamber and the pre-tightening force of the first elastic member 40a, the first slider 31a presses against the first plane 221a, and the first slider 31a rotates relative to the first plane 221a under the driving of the driving member, so that the flow channel portion of the first slider 31a is communicated with the first valve port 222a, and the refrigerant flows out from the first connection pipe 70a through the first valve port 222a, or the blocking portion of the first slider 31a closes the first valve port 222 a.

Similarly, since the flow passage portions have different flow areas in the circumferential direction, the rotation of the first slider 31a allows different portions of the flow passage portions to communicate with the first port 222a, thereby adjusting the refrigerant flow rate.

It can be understood that the sliding block 31 can move up and down relative to the corresponding plane, wherein under the action of the difference between the pressure of the refrigerant and the elastic force of the elastic member, the sliding block 31 can move up and separate from the corresponding plane; after the refrigerant pressure disappears, the slider 31 can move downward to abut against the corresponding plane under the elastic force of the elastic member.

As above, the slider 31 of the valve device is used for realizing the flow rate adjustment of the valve device, specifically, a flow passage part and a blocking part are arranged on the slider 31 along the circumferential direction, the flow passage part is communicated with the top side and the bottom side of the slider 31, and the slider 31 is provided with a connecting part matched with a driving part of the valve device so as to enable the slider to rotate under the driving of the driving part; when the valve device works, the slide block 31 enables the flow passage part to be communicated with the valve port of the valve device through rotation, so that the inlet and the outlet of the valve device are communicated, or the blocking part of the slide block is enabled to close the valve port of the valve device, so that the inlet and the outlet of the valve device are isolated, and therefore the inlet and the outlet of the valve device are communicated or isolated through rotation of the slide block 31, and the valve device has a full-closing function; meanwhile, the flow area of the flow channel part of the slider 31 along the circumferential direction is different, so that different positions of the flow channel part are communicated with the valve port of the valve device through the rotation of the slider 31, and the flow rate is adjusted, and the flow area of the flow channel part along the circumferential direction is easy to set and adjust and can be set smaller according to system requirements, so that the flow rate deviation is easy to control in a smaller range, such as within 5%, through the setting of the flow area of the flow channel part of the slider 31, and the flow rate control precision requirement of a refrigerator and similar small refrigeration systems is met.

In the valve device provided by this embodiment, two sliding block 31 structures are applied, and two planes with valve ports are arranged on the valve body part 20 and are matched with the two sliding blocks 31, one of the sliding blocks 31 is controlled to be separated from the plane by an elastic part and refrigerant pressure, and the other sliding block 31 regulates flow, so that forward and reverse flow control is realized, and forward and reverse flow regulation is realized by the two sliding blocks 31 respectively, so that different forward and reverse flow control characteristics can be realized by different designs of the flow channel parts on the two sliding blocks 31; moreover, the flow regulation is realized by the rotation of the sliding block 31 and the relative plane, so that the bidirectional full closing can be realized, and the phenomenon of locking during the full closing can be avoided; finally, the precision of the flow area of the runner part of the sliding block 31 along the circumferential direction is easy to guarantee, and the flow deviation of the system is convenient to control in a smaller range so as to meet the flow control precision requirements of different refrigeration systems.

Referring to fig. 3-6, fig. 3 is a schematic view of an angle structure of a slider according to a first embodiment of the present invention; FIG. 4 is a schematic view of another angle structure of the slider according to the first embodiment of the present invention; FIG. 5 is a top view of the slider shown in FIG. 3; fig. 6 is a bottom view of the slider shown in fig. 3.

In this embodiment, the flow path portion of the slider 31 includes a flow hole 311 and an arc-shaped variable cross-section groove 312, wherein the flow hole 311 penetrates through the slider 31, the variable cross-section groove 312 is opened on the bottom surface of the slider 31 matched with the plane of the valve body member 20, the flow hole 311 communicates with the variable cross-section groove 312, and thus, the flow hole 311 communicates with the valve chamber and the variable cross-section groove 312; thus, a blocking portion for closing the valve port is formed at a portion where the groove and the hole are not provided in the circumferential direction of the flow path portion.

It is understood that the size of the flow hole 311 and the maximum flow area of the variable cross-section groove 312 determine the maximum value at which the slider 31 can adjust the refrigerant flow rate. Specifically, when the flow area of the flow hole 311 is smaller than the maximum flow area of the variable cross-section groove 312, the maximum refrigerant flow rate controlled by the slider 31 is the flow area of the flow hole 311; when the flow area of the flow hole 311 is larger than the maximum flow area of the variable cross-section groove 312, the maximum value of the refrigerant flow rate controlled by the slider 31 is the maximum flow area of the variable cross-section groove 312.

When the flow area of the variable cross-section groove 312 is set to be gradually increased along the circumferential direction, the flow rate is gradually increased or decreased in the process that the sliding block 31 rotates towards one direction, and the operation in practice is facilitated.

Preferably, the flow area of the flow hole 311 is not smaller than the maximum flow area of the variable cross-section groove 312, and the flow hole 311 is located at the end of the variable cross-section groove 312 where the flow area is the largest, which facilitates the control of the flow rate.

Specifically, one side of the variable cross-section groove 312 is designed as an arc line, and the other side of the variable cross-section groove 312 is designed as an archimedean spiral, which is convenient for processing.

In addition, the structure of the runner portion may be designed as a continuous variable cross-section through hole structure that is continuous and curved.

Referring also to fig. 7-16, fig. 7 is a schematic structural view of a valve housing, a valve seat, a nozzle and a central shaft according to an embodiment; FIG. 8 is a cross-sectional view of the structure shown in FIG. 7; FIG. 9 is a schematic view of the valve housing of FIG. 7; FIG. 10 is a top view of the valve housing of FIG. 9; FIG. 11 is a schematic view of the valve seat of FIG. 7; FIG. 12 is a top view of the valve seat of FIG. 11; FIG. 13 is a schematic cross-sectional view taken along line A-A of FIG. 12; FIG. 14 is a schematic illustration of the construction of a valve cover according to an exemplary embodiment; FIG. 15 is a bottom view of the valve cover of FIG. 14; fig. 16 is a cross-sectional schematic view of the valve cover of fig. 14.

In a specific embodiment, the valve body component 20 includes a valve housing 21, two valve seats 22 fixed at the bottom of the valve housing 21, and a valve cover 23 embedded in the upper end of the valve housing 21.

Specifically, the top surface of the first valve seat 22a forms a first flat surface 221a that cooperates with the first slider 31a, and the top surface of the second valve seat 22b forms a second flat surface 221b that cooperates with the second slider 31 b.

The inner walls of the valve housing 21, the valve seat 22 and the valve cover 23 enclose a valve cavity, and obviously, two sliding blocks 31 are located in the valve cavity, and when the valve cavity is specifically arranged, a preset distance is reserved between the sliding blocks 31 and the valve cover 23 so as to provide a space for the sliding blocks 31 to move upwards away from the corresponding plane, and the elastic member is arranged between the sliding blocks 31 and the valve cover 23.

The valve cover 23 has two rotating shafts, i.e., a first rotating shaft 231a and a second rotating shaft 231b, which are respectively inserted into the first slider 31a and the second slider 31b to define the rotating centers of the two sliders 31, so as to prevent the sliders 31 from deviating from the corresponding plane to prevent the flow channel portion from communicating with the valve port.

In a specific embodiment, in order to define the relative position between the valve cover 23 and the valve housing 21, the valve cover 23 is further provided with a leg portion 233, and the leg portion 233 abuts against the inner bottom wall of the valve housing 21. It should be understood that the arrangement of the leg portions 233 should not affect the assembly and the action space of the slider 31.

Specifically, the leg portions 233 are arc-shaped protrusions protruding downward along the inner wall periphery of the valve cover 23, and more specifically, the leg portions 233 are provided with two and symmetrically distributed to provide uniform support to the valve cover 23.

Further, a blind hole 224 is formed in the top of the valve seat 22, and the rotating shaft of the valve cover 23 is inserted and fixed in the blind hole 224 of the corresponding valve seat 22 through the corresponding slider 31, so that the relative positions of the slider 31 and the valve seat 22 can be controlled more accurately on one hand, and the valve cover 23 and the valve seat 22 can be fixed relatively on the other hand.

In this embodiment, the valve housing 21 and the two valve seats 22 are designed to be split structures, and can be fixed in a welding manner, so that the valve housing is simple, convenient and reliable.

Specifically, two mounting holes 211 matched with the valve seat 22 are formed in the bottom of the valve housing 21, and the valve seat 22 is fixedly embedded in the corresponding mounting holes 211, more specifically, the top surface of the valve seat 22 is slightly higher than the inner bottom wall of the valve housing 21 during assembly, so that the sliding block 31 can rotate smoothly relative to the top surface of the valve seat 22.

In order to define the relative positions of the valve housing 21 and the valve seat 22, a limit step may be provided at the mating of the two; in the illustrated embodiment, an upward step surface 225 is formed at the upper end of the valve seat 22, so that the upper portion of the valve seat 22 is fitted into the mounting hole 211 of the valve housing 21 during assembly, and the step surface 225 of the valve seat 22 abuts against the bottom surface of the valve housing 21 to regulate the relative position of the two.

It will be appreciated that in practice it is also possible to provide the valve housing 21 and valve seat 22 as a unitary structure; it should be noted that, in the illustrated embodiment, the two valve seats 22 have the same structure, which is convenient for machining and assembling, but, in practice, the two valve seats 22 may not have the same structure, so long as the above-mentioned requirements are met.

In a specific embodiment, the top of the sliding block 31 is provided with a cavity 313, so that the distance between the valve cover 23 and the inner bottom wall of the valve housing 21 can be designed to be relatively small, the axial dimension can be shortened, and the valve device can be more compact.

On the basis, in order to make the sliding block 31 and the rotating shaft of the valve cover 23 have a certain matching length, a cylinder part 316 is further arranged in the middle of the concave cavity 313 of the sliding block 31, so that the concave cavity 313 of the sliding block 31 is actually in a ring cavity structure.

The elastic member may be a spring, and is externally fitted to the cylindrical portion 316, and both ends of the elastic member respectively abut against the bottom surface of the valve cover 23 and the cavity bottom surface of the cavity 313.

The valve device also includes a rotation stop member for limiting the range of rotation of the slider 31 and the initial relative position of the slider 31 to the plane of the valve seat 22 to facilitate product commissioning and determination of a time reference.

In a specific embodiment, the rotation stopping component includes a boss 232 fixed on the inner wall of the valve cover 23 and a protrusion 314 fixed on the sliding block 31, and obviously, two bosses 232 are provided on the inner wall of the valve cover 23 to respectively cooperate with the protrusions 314 of the two sliding blocks 31.

The convex portion 314 and the corresponding convex portion 232 of the slider 31 may be specifically configured to:

the convex portion 314 abuts against one side of the boss 232, the blocking portion of the slider 31 closes the valve port, and in the rotation process of the slider 31, one end to the other end of the variable cross-section groove 312 are sequentially communicated with the valve port, and in the rotation direction, the convex portion 314 abuts against the other side of the boss 232 in the state that the other end of the variable cross-section groove is communicated with the valve port.

Referring to fig. 17-20, fig. 17 is a schematic structural view of a magnetic rotor and a rotating wheel according to an embodiment; FIG. 18 is a cross-sectional view of the structure shown in FIG. 17; FIG. 19 is a schematic view of the structure of the magnetic rotor of FIG. 17; fig. 20 is a schematic structural view of the rotating wheel in fig. 17.

Wherein, the lower end of the rotating wheel 12 has an outer tooth ring 121, and both the sliders 31 have an outer gear portion 315 engaged with the outer tooth ring 121.

During operation, the magnetic rotor 11 is driven to rotate by the external coil, the rotating wheel 12 is driven to rotate, and the two sliding blocks 31 rotate synchronously through the meshing transmission of the external gear 121 and the external gear part 315.

Obviously, in order to enable the outer toothing 121 of the rotating wheel 12 to mesh with the outer toothing 315 of the slider 31, the rotating wheel 12 passes through the valve cap 23 with its outer toothing 121 located in the valve chamber.

The driving part has simple and reliable structural design, and simultaneously, the structure of the valve device is more compact.

When the valve body component 20 is specifically arranged, the rotation centers of the two sliding blocks 31 and the rotation center of the rotating wheel 12 are located on the same straight line, that is, the two sliding blocks 31 are symmetrically arranged relative to the rotating wheel 12, as can be understood by referring to fig. 21, which shows a bottom view of the two sliding blocks 31 in meshing fit with the rotating wheel 12, so that the structure of the whole valve body component 20 is symmetrical, and the operation is more stable.

In a specific embodiment, the magnetic rotor 11 includes a cylindrical wall 111 and a bottom wall 112, wherein the bottom wall 112 has an insertion hole 1121, the middle portion of the rotating wheel 12 has an annular groove 122 engaged with the insertion hole 1121, and a limit structure is provided between the insertion hole 1121 and the annular groove 122 to prevent the rotating wheel 12 from rotating relative to the magnetic rotor 11.

There are several ways to realize the limiting structure, and a simpler way is to realize the limiting structure by the shapes of the insertion holes 1121 and the annular groove 122.

Specifically, the insertion hole 1121 has at least one plane section, the groove bottom of the annular groove 122 has a plane section matched with the plane section, after the rotating wheel 12 is inserted into the magnetic rotor 11, the annular groove 122 is embedded in the insertion hole 1121, and the plane sections of the two are attached, so that the relative positions of the rotating wheel 12 and the magnetic rotor 11 can be limited.

More specifically, the insertion hole 1121 may have a polygonal hole structure, and the sectional shape of the bottom of the groove 122 is identical to the shape of the insertion hole 1121.

In a specific embodiment, the bottom wall 112 of the magnetic rotor 11 is provided with a balance hole 1122 to keep the pressure balance between the upper and lower cavities of the magnetic rotor 11. In the illustrated embodiment, the balance holes 1122 are provided in plural numbers and are uniformly distributed around the insertion holes 1121, and in practice, the number and arrangement of the balance holes 1122 may be set according to the requirement.

The valve assembly further includes a housing 50 externally fitted over the magnetic rotor 11 and a central shaft 60, wherein the lower end of the housing 50 is fixedly connected to the valve body member 20.

Specifically, the housing 50 is fixedly connected to the upper end of the valve housing 21, and a step structure may be provided at the connection portion of the two in order to limit the relative position of the two.

Wherein, the rotating wheel 12 has a central through hole 123, the central shaft 123 passes through the central through hole 123, one end of the central shaft 123 is fixedly connected with the housing 50, and the other end is fixedly connected with the valve housing 21 of the valve body component 20, so that the rotating center of the rotating wheel 12 can be limited, and the matching of the rotating wheel 12 and the two sliders 31 can be ensured.

In the above embodiments, the flow path portion of the slider 31 has the structure of the flow hole 311 and the variable cross-section groove 312, but in actual installation, the flow path portion of the slider 31 may have another structure.

Referring to fig. 22-25, fig. 22 is a schematic view illustrating an angle structure of a slider according to a second embodiment of the present invention; FIG. 23 is a schematic view of another angle structure of a slider according to a second embodiment of the present invention; FIG. 24 is a top view of the slider shown in FIG. 22; fig. 25 is a bottom view of the slider shown in fig. 22.

In this embodiment, the runner portion of the slider 31 'is specifically a plurality of runner holes 311' with different diameters, and specifically, the plurality of runner holes 311 'are arranged in an arc shape circumferentially around the rotation center of the slider 31', so that a portion between the two runner holes 311 'located at the outer ends forms a blocking portion of the slider 31'.

In the illustrated embodiment, the runner portion of the slider 31 'is provided with five runner holes 311', and the diameters of the five runner holes 311 'are sequentially increased in the circumferential direction, and the angles between two adjacent runner holes 311' are equal, that is, the plurality of runner holes 311 'are uniformly distributed on the arc segment where the runner holes 311' are arranged. With this design, the slider 31' is adjusted once for each rotation through the same angle, i.e., the flow rate is adjusted, which facilitates the operation of the valve device.

It is understood that, in practice, the aperture of each flow passage hole 311 ' may be irregular when arranged, and in addition, the plurality of flow passage holes 311 ' may be arranged unevenly on the circular arc segment where the flow passage holes 311 ' are arranged. But relatively, the regular and even arrangement as shown in the figure is more convenient for controlling the product.

Further, as shown in fig. 23, a plurality of inner grooves 312 ' are further formed in the bottom surface of the slider 31 ', and correspond to the positions of the plurality of flow passage holes 311 ', respectively, and the size of each inner groove 312 ' is larger than the corresponding flow passage hole 311 '.

With the above arrangement, when the slider 31 'rotates relative to the valve seat member 20, direct friction between the end of the flow path hole 311' and the plane of the valve seat 22 is avoided, and the flow path hole 311 'can be prevented from being clogged by the rotational wear between the bottom surface of the slider 31' and the plane of the valve seat 22, thereby ensuring the reliability of the flow rate control of the product.

Specifically, the size of each inner groove 312 'may be uniform for convenient processing, and in the solution shown in fig. 25, each inner groove 312' is a counter bore structure with a uniform aperture. It should be understood that the shape of the inner groove 312 'is not limited as long as direct friction between the end of the flow passage hole 311' and the plane of the valve seat 22 can be avoided.

The slider may be used for a valve device having another structure, and is not limited to a valve device having a double slider structure with two-way flow.

Referring to fig. 26, fig. 26 is a schematic cross-sectional view of a valve device according to another embodiment of the present invention.

In this embodiment, the valve device is provided with a slider 31 ″, and further comprises a driving member and a valve body member 20 ', wherein the top surface of the valve body member 20 ' is provided with a valve port 203 ' communicating an inlet 201 ' and an outlet 202 '; the bottom surface of the slider 31 "is attached to the top surface of the valve body member 20';

the driving component can drive the slide block 31 'to rotate relative to the valve body component 20' so as to enable the runner part of the slide block 31 'to be communicated with the valve port 203', or enable the blocking part of the slide block 31 'to close the valve port 203'.

The slider 31 "is substantially similar to the slider structure described in the previous embodiments, except that the connection of the slider 31" to the drive member may be provided in other configurations, as the valve device is provided with only one slider 31 ".

In this embodiment, the driving part includes a magnetic rotor 11 ' and a rotating shaft 12 ' fixedly inserted in the magnetic rotor 11 ', the magnetic rotor 11 ' is driven to rotate by an external coil to drive the rotating shaft 12 ' to rotate together, and the sliding block 31 ″ and the rotating part of the driving part can be fixedly connected together to simplify the connection structure; specifically, a key groove may be formed in the slider 31 ″, and a key portion that is engaged with the key groove may be formed in the magnetic rotor 11 ', so that the key portion of the magnetic rotor 11 ' is fixedly embedded in the key groove of the slider 31 ″, and the two are fixed in relative positions, so that the magnetic rotor 11 ' may drive the slider 31 ″.

Specifically, as shown in fig. 26, the shaft 12 ' passes through the slider 31 "and is in clearance fit with the valve body member 20 ', so that the relative positions of the slider 31" and the valve body member 20 ' can be positioned to avoid the slider 31 "from shifting.

In addition, a pretension spring 40 ' is provided between the magnetic rotor 11 ' and the slide 31 "in order to press the slide 31" against the top surface of the valve body part 20 '.

When the magnetic rotor 11 ' works, the slide block 31 ' is driven to rotate through the rotation of the magnetic rotor 11 ', the runner part of the slide block is communicated with the valve port 203 ', so that the inlet 201 ' is communicated with the outlet 202 ', or the blocking part of the slide block closes the valve port 203 ', so that the inlet 201 ' and the outlet 202 ' are cut off; the flow rate of the refrigerant is also adjusted by communicating different parts of the flow channel part with the valve port 203'.

The valve device and its slider provided by the present invention have been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The valve device comprises a driving part and a valve body part, and is characterized by also comprising a sliding block, wherein the sliding block is provided with a flow channel part and a blocking part which are circumferentially arranged around the rotation center of the sliding block; the top of the sliding block is provided with a concave cavity, the flow channel part is communicated with the bottom wall of the concave cavity and the bottom side of the sliding block, and the flow area of the flow channel part is different along the circumferential direction; the sliding block is also provided with an outer gear part which is in meshing fit with the outer gear teeth of the driving part, so that the sliding block can rotate under the driving of the driving part;

the valve body component comprises a valve seat matched with the sliding block, the top surface of the valve seat is provided with a valve port, and the valve port is communicated with a connector;

the sliding block is pressed against the top surface of the valve seat by the elastic piece; the driving component can drive the sliding block to rotate relative to the valve seat, so that the flow passage part of the sliding block is communicated with the valve port of the valve seat, or the blocking part of the sliding block is closed to the valve port of the valve seat.

2. The valve device according to claim 1, wherein the flow passage portion includes a plurality of flow passage holes having a diameter not completely the same, and the plurality of flow passage holes are distributed in an arc shape.

3. The valve apparatus according to claim 2, wherein the bottom surface of the slider has a plurality of inner grooves corresponding to positions of the plurality of flow passage holes, respectively, and each of the inner grooves has a size larger than the corresponding flow passage hole.

4. The valve device according to claim 2, wherein the plurality of flow passage holes have a sequentially increasing hole diameter in a circumferential direction.

5. The valve device according to claim 1, wherein the runner section is a continuous variable cross-section through hole having an arc shape.

6. The valve device according to claim 1, wherein the flow path portion includes a flow hole and an arc-shaped continuous variable cross-section groove, the variable cross-section groove is provided on a bottom surface of the slider, and the flow hole penetrates the slider and communicates with the variable cross-section groove.

7. The valve arrangement of claim 6, wherein the flow area of the flow aperture is not less than the maximum flow area of the variable cross-section groove.

8. The valve device according to claim 7, wherein the flow area of the variable cross-section groove increases sequentially in the circumferential direction, and the flow hole is located at an end of the variable cross-section groove where the flow area is largest.

9. The valve assembly of claim 8 wherein one side of the variable cross-section slot is radiused and the other side of the slot is an archimedean spiral; or the groove walls on the two sides of the variable cross-section groove are all in Archimedes spiral.

10. The valve device according to claim 1, wherein there are two sliders, and the valve body member comprises two valve seats respectively engaged with the two sliders, and the sliders are further movable up and down with respect to the valve seats.

11. The valve apparatus according to any one of claims 1 to 10, wherein the drive member comprises a magnetic rotor and a rotating wheel secured to the magnetic rotor, the rotating wheel having an outer mesh; the slider has an external gear portion engaged with the external tooth teeth; the magnetic rotor can drive the rotating wheel to rotate so as to drive the sliding block to rotate.