CN212616489U - Three-way valve and valve element part thereof - Google Patents

Abstract

The utility model discloses a three-way valve and a valve core component thereof, wherein the valve core component comprises a connecting shaft and two sealing components sleeved on the connecting shaft, and the two sealing components are arranged at intervals with preset distances; the sealing assembly comprises a sealing element, and a cushion block and a pressing block which are positioned on two sides of the sealing element, and the cushion block and the pressing block are fixedly sleeved on the connecting shaft and extrude and fix the sealing element; the pressing blocks of the two sealing components are oppositely arranged; a first sealing structure is formed between the cushion block and the sealing element, and a second sealing structure is formed between the pressing block and the sealing element. Compared with the prior art, the valve core component avoids using a locking nut to fix related components on the connecting shaft, and correspondingly avoids the problem of product failure caused by the loosening of the locking nut.

Description

Three-way valve and valve element part thereof

Technical Field

The utility model relates to the technical field of valves, especially, relate to a three-way valve and case part thereof.

Background

In the refrigeration system, the switching between the refrigeration mode and the defrosting mode is mostly carried out by a three-way valve, and the switching between other similar modes is also mostly carried out by the three-way valve.

A refrigerant inlet, a condensation interface and an evaporation interface are formed in a valve body part of the three-way valve, and a first valve port and a second valve port are formed in an inner cavity of the valve body part, wherein the refrigerant inlet is communicated with the condensation interface through the first valve port, and the refrigerant inlet is communicated with the evaporation interface through the second valve port; the valve core component of the three-way valve can move axially along the inner cavity of the valve body component to open the first valve port, close the second valve port or close the first valve port and open the second valve port, so that the switching between the refrigeration mode and the defrosting mode of the system is realized.

The valve core component of most existing three-way valves comprises a connecting shaft, a supporting sleeve is fixedly sleeved on the connecting shaft, a sealing element and a cushion block are arranged at the upper end of the supporting sleeve, the sealing element and the cushion block are both sleeved on the connecting shaft, the cushion block presses the sealing element against the upper end face of the supporting sleeve, a sealing element and a pressing block are arranged at the lower end of the supporting sleeve, the sealing element and the pressing block are both sleeved on the connecting shaft, the pressing block presses the sealing element against the lower end face of the supporting sleeve, and the components are installed on the connecting shaft and then; in order to ensure the sealing property, O-shaped rings are required to be arranged between the support sleeve and the connecting shaft, between the sealing element and the support sleeve and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a valve core component of a three-way valve, which comprises a connecting shaft and two sealing components sleeved on the connecting shaft, wherein the two sealing components are arranged at a preset distance;

the sealing assembly comprises a sealing element, and a cushion block and a pressing block which are positioned on two sides of the sealing element, and the cushion block and the pressing block are fixedly sleeved on the connecting shaft and extrude and fix the sealing element; the pressing blocks of the two sealing components are oppositely arranged;

a first sealing structure is formed between the cushion block and the sealing element, and a second sealing structure is formed between the pressing block and the sealing element.

The utility model discloses a three-way valve's case part that provides is equipped with two seal assembly on the connecting axle, and every seal assembly includes the sealing member and is located the cushion and the briquetting of sealing member both sides, and cushion and briquetting are all overlapped admittedly on the connecting axle to fix the sealing member extrusion between them, wherein, are formed with first seal structure between cushion and the sealing member, are formed with the second seal structure between briquetting and the sealing member. Therefore, the sealing element is clamped by the cushion block and the pressing block which are fixedly sleeved on the connecting shaft, the sealing element is extruded and fixed, the reliability of the structure is not easy to lose efficacy, compared with the background art, the valve core component avoids using a locking nut to fix related components on the connecting shaft, and accordingly the possibility of product failure caused by the loosening of the locking nut is reduced.

The utility model also provides a three-way valve, including the valve body part, the valve body part is equipped with refrigerant import, condensation interface and evaporation interface, the inner chamber of valve body part still has first valve port and second valve port, the refrigerant import is through the first valve port with the condensation interface communicates, the refrigerant import is through the second valve port with the evaporation interface communicates; the valve core component can move along the axial direction of the valve body component to open one of the first valve port and the second valve port and close the other valve port.

Since the valve core member has the above technical effects, the three-way valve including the valve core member also has the same technical effects, and the discussion thereof is not repeated.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a three-way valve provided in the present invention;

FIG. 2 is an enlarged view of a portion I of FIG. 1;

FIG. 3 is a partial enlarged view of the portion II in FIG. 1;

FIG. 4 is a schematic structural view of the valve core member of FIG. 1;

FIG. 5 is a partial enlarged view of portion A of FIG. 4;

FIG. 6 is a partial enlarged view of the portion B in FIG. 4;

fig. 7 is a schematic structural view of another embodiment of the valve core component provided by the present invention;

FIG. 8 is a partial enlarged view of the portion C in FIG. 7;

fig. 9 is a partially enlarged view of a portion D in fig. 7.

Description of reference numerals:

the valve body component 100, the upper valve body 110, the pilot port 111, the condensation port 112, the piston cavity 113, the second balance hole 114, the third balance hole 115, the first plug 116, the lower valve body 120, the second valve port 121, the refrigerant inlet 122, the evaporation port 123, the first balance hole 124, the seal seat 130, the first valve port 131, the seal ring 132, and the seal gasket 140;

a piston member 200, a piston body 210, an elastic member 220, a spring seat 230;

the spool member 300, 300', the connecting shaft 310, the first annular step surface 311, the second annular step surface 312;

the sealing assemblies 320a and 320b, the sealing element 321, a first sealing bulge 3211, a second sealing bulge 3212, a cushion block 322, a first sealing groove 3221, a pressing block 323, a second sealing groove 3231 and a limit convex part 3232;

the seal assemblies 320a ', 320b ', the seal member 321 ', the spacer block 322 ', the first sealing protrusion 3221 ', the axial protrusion 3222 ', the pressing block 323 ', the second sealing protrusion 3231 ', and the limiting protrusion 3232 ';

the pressure relief component 400, the pressure relief cavity 410, the first communicating hole 420, the second communicating hole 430, the pressure relief valve port 440, the push rod 450, the pressure relief valve core 460, the elastic element 470, and the second plug 480.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

For the convenience of understanding and simplicity of description, the following description is taken in conjunction with the three-way valve and the valve core component thereof, and the beneficial effects are not repeated.

It should be noted that the terms of orientation, up, down, left, right, etc. referred to herein are defined by the positions of the components in the drawings and the positions of the components relative to each other, wherein the axial direction refers to the axial direction of the three-way valve, i.e., the vertical direction from top to bottom or from bottom to top of the drawing sheet; it is to be understood that the directional terms are used merely for clarity and convenience in describing the technical solutions and should not be construed as limiting the scope of protection.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a three-way valve according to an embodiment of the present invention; FIG. 2 is an enlarged view of a portion I of FIG. 1; fig. 3 is a partially enlarged view of a portion II in fig. 1.

As shown in the drawings, this embodiment provides a three-way valve including a valve body member 100, a piston member 200, a spool member 300, and a relief member 400.

The piston member 200 is provided in the inner cavity of the valve body member 100, and divides the inner cavity of the valve body member 100 into a piston cavity 113 located above the piston member 200 and a main cavity located below the piston member 200.

The valve body member 100 has a pilot port 111 at the tip end thereof, which communicates with a piston chamber 113.

The piston member 200 specifically includes a piston body 210, an elastic member 220, and a spring seat 230; specifically, the piston body 210 partitions the inner cavity of the valve body 100, the outer peripheral wall of the piston body 210 is attached to the inner peripheral wall of the valve body 100, and a sealing member is further provided between the piston body 210 and the valve body 100 in order to ensure the sealing property between the partitioned piston cavity 113 and the main cavity; two ends of the elastic component 220 are respectively abutted against the top end of the valve body component 100 and the piston body 210, in order to position the elastic component 220 and avoid the elastic component 220 from deflecting, a spring seat 230 is fixedly arranged on the piston body 210, and the lower end of the elastic component 220 is inserted into the spring seat 230.

The valve body 100 further has a condensation port 112, a refrigerant inlet 122 and an evaporation port 123, which are communicated with the main chamber, wherein the refrigerant inlet 122 is communicated with the condensation port 112 through a first valve port 131, and the refrigerant inlet 122 is communicated with the evaporation port 123 through a second valve port 121; as shown in fig. 1, the condensation port 112, the refrigerant inlet 122 and the evaporation port 123 are arranged from top to bottom along the axial direction of the valve body 100, and accordingly, the first valve port 131 is located above the second valve port 121.

The valve core component 300 is located in the main cavity of the valve body component 100 and connected to the piston body 210, when the pressure at the upper end and the lower end of the piston body 210 changes, the piston body 210 can move up and down along the axial direction of the valve body component 100, and drives the valve core component 300 to move up and down along the axial direction together, so as to close the first valve port 131, open the second valve port 121, or open the first valve port 131, and close the second valve port 121.

Referring to fig. 1, the valve body 100 further defines a balance hole set for communicating the refrigerant inlet 122 with the piston cavity 113.

When the piston works, when the pilot port 111 is closed, a part of high-pressure refrigerant entering from the refrigerant inlet 122 can enter the piston cavity 113 through the balance hole group, so that pressures at the upper end and the lower end of the piston body 210 are balanced, and under the action of the elastic component 220, the piston body 210 keeps the valve core component 300 in a state of closing the second valve port 121 and opening the first valve port 131, namely the state shown in fig. 1, at the moment, the refrigerant inlet 122 is communicated with the condensation port 112 through the first valve port 131, and the high-pressure refrigerant flows out from the condensation port 112, so that a refrigeration function is realized.

When the air conditioner works, when the pilot port 111 is opened, a part of high-pressure refrigerant entering from the refrigerant inlet 122 still enters the piston cavity 113 through the balance hole group, and because the pilot port 111 is in an open state at this time, the part of refrigerant enters the piston cavity 113 and then is discharged through the pilot port 111, so that the pressure of the piston cavity 113 is reduced, the pressure at the lower end of the piston body 210 is greater than the pressure at the upper end of the piston body, under the action of pressure difference, the piston body 210 moves upwards by overcoming the elastic force of the elastic component 220, the valve core component 300 moves upwards along with the elastic force to open the second valve port 121 and close the first valve port 131, at this time, the refrigerant inlet 122 is communicated with the evaporation interface 123 through the second valve port 121, and the high-pressure refrigerant flows out of the evaporation interface 123.

In actual operation, after the three-way valve is switched from the cooling mode to the heating mode, a part of high-pressure refrigerant inevitably exists in the condensation port 112, and in order to facilitate switching back to the cooling mode when necessary, the part of high-pressure refrigerant in the condensation port 112 needs to be discharged, so the three-way valve is further provided with a pressure relief part 400.

Referring to fig. 1 and 2, in this embodiment, the pressure relief member 400 includes a pressure relief chamber 410 opened in the valve body member 100, a first communication hole 420, and a second communication hole 430; the first communicating hole 420 communicates with the pressure relief chamber 410 through the pressure relief valve port 440, the pressure relief chamber 410 communicates with the piston chamber 113 through the second communicating hole 430, and the first communicating hole 420 communicates with the condensation port 112.

The pressure relief component 400 further includes a plunger 450, an elastic element 470 and a pressure relief valve core 460, wherein the plunger 450 is fixed in the pressure relief cavity 410, the elastic element 470 is disposed between the plunger 450 and the pressure relief valve core 460 to press the pressure relief valve core 460 against the pressure relief valve port 440, and the pressure relief valve core 460 and the pressure relief valve port 440 form a sealing pair.

It is understood that the pressure relief chamber 410 formed in the valve body part 100 has an open structure in order to facilitate the assembly of the push rod 450, the elastic member 470 and the pressure relief valve spool 460.

It will also be appreciated that, in the normal state, the elastic element 470 presses the relief valve core 460 against the relief valve port 440, so that it can close the relief valve port 440 and cut off the passage between the first communication hole 420 and the relief chamber 410.

When the three-way valve is switched from the cooling mode to the heating mode, if the condensing port 112 has a high-pressure refrigerant, the condensing port is communicated with the first communication hole 420, so that the high-pressure refrigerant acts on the pressure relief valve core 460 through the first communication hole 420, overcomes the elastic force of the elastic element 470 to jack the pressure relief valve core 460, and opens the pressure relief valve port 440, so that the high-pressure refrigerant can enter the pressure relief cavity 410 through the first communication hole 420 and the pressure relief valve port 440, and then enters the piston cavity 113 through the pressure relief cavity 410 and the second communication hole 430 and then is discharged from the pilot port 111, so that the pressure in the condensing port 112 is reduced, and the three-way valve is switched back to the cooling mode when needed subsequently.

In a specific embodiment, the first communication hole 420 of the pressure relief member 400 is directly communicated with the condensation port 112, and the second communication hole 430 is directly communicated with the piston cavity 113. When the pressure relief chamber 410, the first communication hole 420 and the second communication hole 430 are arranged on the wall of the valve body member 100 close to the condensation port 112 and the piston chamber 113, as shown in fig. 1 and 2, it is obvious that the pressure relief chamber 410, the first communication hole 420 and the second communication hole 430 are located on the same side as the condensation port 112 and on the upper portion of the valve body member 100.

In addition, because the first communication hole 420 of the pressure relief component 400 is directly communicated with the condensation interface 112, and the second communication hole 430 is directly communicated with the piston cavity 113, the related hole structure of the pressure relief component 400 does not need to be related to the balance hole group in position, and the problem that the related hole structure needs to be crossed when the related structure of the pressure relief component 400 and the balance hole group are arranged in the same position in the background art is avoided, so that the hole structures can be flexibly arranged as required, and the processing difficulty is reduced.

In a specific embodiment, the refrigerant inlet 122 and the condensation port 112 are located at different sides of the valve body 100, and the balance hole set is located at the same side as the refrigerant inlet 122 and the piston cavity 113 due to the communication between the refrigerant inlet 122 and the piston cavity 113, so as to facilitate processing, thereby avoiding mutual interference between the related structure of the pressure relief component 400 and the position of the balance hole set, and facilitating processing.

In the illustrated embodiment, the refrigerant inlet 122 and the balance hole set are located on the right side of the valve body 100 in the illustration, and the condensation interface 112 and the pressure relief part 400 are located on the left side of the valve body 100 in the illustration, that is, they are located on opposite sides of the valve body 100, it can be understood that, in actual processing, only the two are staggered in the circumferential direction of the valve body 100, and they may be specifically set according to actual requirements.

In this embodiment, as shown in fig. 1, the valve body component 100 includes an upper valve body 110 and a lower valve body 120 which are separately arranged and fixedly connected; the piston cavity 113 and the condensation port 112 are both formed in the upper valve body 110, and the pressure relief component 400 is also arranged in the upper valve body 110; the refrigerant inlet 122, the evaporation port 123 and the second valve port 121 are formed in the lower valve body 120, and specifically, the evaporation port 123 and the condensation port 112 are located on the same side of the valve body 100.

The balance hole group is formed on the upper valve body 110 and the lower valve body 120, and specifically, the balance hole group comprises a first balance hole 124 opened on the lower valve body 120, a second balance hole 114 opened on the upper valve body 110 and a third balance hole 115; the first balance hole 124 communicates with the refrigerant inlet 122 and the second balance hole 114, and the third balance hole 115 communicates with the second balance hole 114 and the piston cavity 113.

In a specific embodiment, the first balance hole 124 is disposed diagonally, the second balance hole 114 extends upward from the bottom of the upper valve body 110 to the position of the piston cavity 113, and the third balance hole 115 is disposed substantially transversely to communicate the second balance hole 114 with the piston cavity 113.

For convenience of processing, the third balance hole 115 penetrates through the wall surface of the upper valve body 110, and in order to ensure the sealing performance, the opening of the third balance hole 115 can be sealed by the first plug 116.

Specifically, the center line of the third balance hole 115 may be disposed perpendicular to the axial direction of the valve body member 100, which facilitates machining and shortens the flow path of the balance hole group.

As above, because the pressure relief cavity 410 of the pressure relief component 400, the related communication hole structure and the balance hole component are disposed on different sides of the valve body component 100, the situation that the balance hole component and the pressure relief structure are concentrated on the same position of the valve body component 100 is avoided, and the cross design of the related hole structure is avoided, so that the valve body component 100 can realize the processing of the related hole structure only by arranging two main structures, namely the upper valve body 110 and the lower valve body 120, the structure of the valve body component 100 is simplified, the processing difficulty is reduced, and accordingly, the production cost can be reduced.

Specifically, the valve body assembly 100 further includes a seal seat 130, the seal seat 130 is clamped and fixed by the upper valve body 110 and the lower valve body 120, and the first port 131 is formed in the seal seat 130.

Referring to fig. 1, it can be understood that the inner cavity of the upper valve body 110 and the inner cavity of the lower valve body 120 are communicated to form a valve cavity, the piston member 200 is disposed in the upper valve body 110 to divide the inner cavity of the upper valve body 110 into a piston cavity 113 and a lower cavity, the lower cavity of the upper valve body 110 and the inner cavity of the lower valve body 120 are communicated to form the main cavity, the first port 131 of the sealing seat 130 divides the main cavity, and the inner cavity of the lower valve body 120 is communicated with the lower cavity of the upper valve body 110 through the first port 131.

Specifically, as shown in fig. 3, a groove-shaped structure is formed at the joint of the upper valve body 110 and the lower valve body 120, the outer periphery of the seal seat 130 is engaged with the groove-shaped structure, the seal seat 130 is clamped and fixed after the upper valve body 110 and the lower valve body 120 are fixedly connected, and usually, the upper valve body 110 and the lower valve body 120 are detachably fixed by a fastener such as a bolt.

In order to ensure the sealing performance, a sealing ring 132 is disposed between the sealing seat 130 and the upper valve body 110 or the peripheral wall of the lower valve body 120, and the sealing ring 132 is disposed between the sealing seat 130 and the lower valve body 120; also, to ensure the sealing performance, a packing 140 is further disposed between the upper valve body 110 and the lower valve body 120, and it is understood that the packing 140 also starts to have a through hole at a position corresponding to the first balance hole 124 so as to communicate the first balance hole 124 with the second balance hole 114.

In a specific scheme, the central lines of the pressure relief cavity 410 and the first communication hole 420 of the pressure relief component 400 are parallel to the axial direction of the valve body component 100, so that the spatial structure of the upper valve body 110 can be reasonably utilized, the volume of the upper valve body 110 is reduced, and materials are saved.

Specifically, the center line of the condensation port 112 is perpendicular to the center line of the first communication hole 420, and when pressure relief is required, the high-pressure refrigerant at the condensation port 112 is convenient to push the pressure relief valve element 460 to act.

More specifically, the center line of the second communication hole 430 is perpendicular to the center line of the first communication hole 420, that is, the second communication hole 430 is perpendicular to the pressure relief cavity 410, so that the communication path between the pressure relief cavity 410 and the piston cavity 113 can be effectively shortened, which is beneficial to discharge the high-pressure refrigerant in the condensation port 112.

Specifically, the second communication hole 430 penetrates through the wall surface of the valve body member 100, as shown in fig. 2, it can be understood that the second communication hole 430 and the pressure relief chamber 410 have a cross structure, which facilitates the processing of the second communication hole 430; meanwhile, to ensure the sealing property, the opening of the second communication hole 430 is sealed by the second plug 480.

Referring also to fig. 4-6, fig. 4 is a schematic view of the valve core member of fig. 1; FIG. 5 is a partial enlarged view of portion A of FIG. 4; fig. 6 is a partially enlarged view of a portion B in fig. 4.

In this embodiment, the valve core component 300 includes a connecting shaft 310, and further includes two sealing assemblies 320a and 320b sleeved on the connecting shaft 310, and the two sealing assemblies 320a and 320b are disposed at a predetermined distance and respectively correspond to the first valve port 131 and the second valve port 121.

Referring to fig. 1, it can be understood that the upper sealing assembly 320a is used for opening and closing the first valve port 131, and the lower sealing assembly 320b is used for opening and closing the second valve port 121.

The two sealing assemblies 320a and 320b have the same composition structure, and both include a sealing element 321, and a cushion block 322 and a pressing block 323 located at both sides of the sealing element 321, wherein the cushion block 322 and the pressing block 323 are both fixedly sleeved on the connecting shaft 310 and press and fix the sealing element 321.

Wherein, the pressing block 323 of the sealing assembly 320a is arranged opposite to the pressing block 323 of the sealing assembly 320b, that is, the pressing block 323 of the sealing assembly 320a faces the pressing block 323 of the sealing assembly 320 b; as shown in fig. 4, the upper sealing assembly 320a has a pressing block 323 below the sealing element 321, and accordingly, the spacer block 322 is disposed above the sealing element 321, and the lower sealing assembly 320b has a pressing block 323 above the sealing element 321, and accordingly, the spacer block 322 is disposed below the sealing element 321.

A first sealing structure is formed between the sealing member 321 and the packing 322, and a second sealing structure is formed between the sealing member 321 and the pressing block 323.

As described above, the valve core component 300 is provided with the two sealing assemblies 320a and 320b on the connecting shaft 310, and the sealing member 321 of each sealing assembly is clamped by the pressing block 323 and the cushion block 322 fixedly sleeved on the connecting shaft 310, so that the sealing member 321 is pressed and fixed.

In a specific embodiment, the first sealing structure is formed between the sealing member 321 and the spacer 322, and the second sealing structure is formed between the sealing member 321 and the pressing block 323.

Specifically, the first sealing structure includes a first sealing groove 3221 formed in the spacer 322 and a first sealing protrusion 3211 formed in the sealing member 321, and the first sealing protrusion 3211 is snapped into the first sealing groove 3221; the second sealing structure includes a second sealing groove 3231 formed in the pressing block 323 and a second sealing protrusion 3212 formed in the sealing member 321, and the second sealing protrusion 3212 is fitted into the second sealing groove 3231.

In practice, the sealing element 321 is mostly made of rubber or other elastic material, and at this time, the first sealing protrusion 3211 and the second sealing protrusion 3212 of the sealing element 321 may be formed during the process of clamping and pressing the sealing element 321 by the spacer 322 and the pressing block 323, that is, during normal processing, the sealing protrusion is not separately formed on the surface of the sealing element 321 in contact with the pressing block 323 and the spacer 322, and during the process of clamping the sealing element 321 by the spacer 322 and the pressing block 323, the sealing element 321 is formed into the sealing protrusion embedded in the first sealing groove 3221 and the second sealing groove 3231 by pressing, so as to achieve sealing.

In practice, however, it is also possible to machine the first and second sealing projections 3211, 3212 in a corresponding manner before assembly, i.e. on the sealing element 321, which is relatively simple and reliable.

As described above, the sealing structure is formed with the packing 321, the pressing block 323, and the packing 322 themselves, and it is not necessary to separately provide an additional sealing member, and the structure of the spool member 300 can be simplified.

In a specific scheme, a limiting convex part 3232 is formed by extending the outer periphery of the pressing block 323 in the direction of the cushion block 322 along the axial direction, and the limiting convex part 3232 is abutted against the outer periphery of the sealing element 321; the location of the limit protrusion 3232 can define the radial position of the seal 321.

In a specific scheme, the pressing block 323 and the cushion block 322 can be fixed with the connecting shaft 310 in an interference fit or welding mode, and the fixing mode is simple, reliable and easy to implement.

In a specific scheme, the connecting shaft 310 is provided with a first annular step surface 311 facing upwards, and the pressing block 323 of the sealing assembly 320a located above is abutted against the first annular step surface 311, and it can be understood that the arrangement of the first annular step surface 311 can limit the axial position of the sealing assembly 320a on the connecting shaft 310, and ensure the opening and closing matching of the sealing assembly 320a and the first valve port 131.

The connecting shaft 310 further has a second downward annular step surface 312, and the pressing block 323 of the lower sealing assembly 320b abuts against the second annular step surface 312, and it can be understood that the second annular step surface 312 is arranged to limit the axial position of the sealing assembly 320a on the connecting shaft 310, and ensure the opening and closing of the sealing assembly 320b and the second valve port 121.

In addition to the above structure, the valve core component may have other structural forms, please refer to fig. 7 to 9 together, fig. 7 is a schematic structural view of another embodiment of the valve core component provided by the present invention; FIG. 8 is a partial enlarged view of the portion C in FIG. 7; fig. 9 is a partially enlarged view of a portion D in fig. 7.

In this embodiment, the valve core component 300 ' also includes a connecting shaft 310 and two sealing assemblies 320a ', 320b ' sleeved on the connecting shaft 310, and the two sealing assemblies 320a ', 320b ' are spaced apart by a predetermined distance and are respectively corresponding to the first valve port 131 and the second valve port 121.

The basic construction of the valve core member 300' is similar to that of the previous embodiment, except that the seal assembly is constructed somewhat differently, as will be described in detail below.

In this embodiment, the sealing assemblies 320a ', 320b ' also include a sealing member 321 ', and a spacer block 322 ' and a pressing block 323 ' located at both sides of the sealing member 321 ', and the spacer 322 ' and the pressing block 323 ' are also fixedly sleeved on the connecting shaft 310 and press and fix the sealing member 321 '.

In this embodiment, the first sealing structure formed between the packing 322 'and the sealing member 321' includes a first sealing protrusion 3221 'formed on the packing 322', and the first sealing protrusion 3221 'is embedded in the sealing member 321' to seal therebetween; the second sealing structure formed between the pressing block 323 'and the sealing member 321' includes a second sealing protrusion 3231 'formed at the pressing block 323', and the second sealing protrusion 3231 'is embedded in the sealing member 321' to seal therebetween.

It can be understood that in this embodiment, the first sealing protrusion 3221 ' is disposed on the surface of the pad 322 ' contacting the sealing member 321 ', the second sealing protrusion 3231 ' is disposed on the surface of the pressing block 323 ' contacting the sealing member 321 ', and when the pressing block 323 ' and the sealing member 321 ' are clamped therebetween, the first sealing protrusion 3221 ' and the second sealing protrusion 3231 ' are respectively pressed into the sealing member 321 ' to form a seal.

The sealing mode has simple structure and high reliability.

In this embodiment, the connecting shaft 310 is also provided with an upward facing first annular step surface 311 and a downward facing second annular step surface 312 to limit the axial position of the two seal assemblies 310a ', 310 b' on the connecting shaft 310.

Specifically, in this embodiment, the pressing block 323 'also has a limit protrusion 3232' facing the spacer 322 'to limit the radial position of the sealing member 321'.

In a specific embodiment, the spacer 322 'includes an annular body and an axial projection 3222' extending axially from an inner edge of the annular body toward the pressing block 323 ', the axial projection 3222' is inserted into an inner hole of the sealing member 321 ', and it can be understood that, when so configured, a receiving portion for receiving the sealing member 321' is formed between an outer periphery of the axial projection 3222 'of the spacer 322' and the annular body of the spacer 322 'and the pressing block 323'.

It can be understood that, when the sealing assemblies 320a ', 320 b' are assembled to the connecting shaft 310, the pressing block 323 'is fixedly sleeved on the connecting shaft 310 and abutted against the corresponding annular step surface 311, then the sealing element 321' is sleeved, and finally the cushion block 322 'is sleeved, so that the cushion block 322' is pressed towards the pressing block 323 ', and the design of the axial boss 3222' of the cushion block 322 'can control the pressing degree of the cushion block 322' pressing the sealing element 321 ', and avoid over compression of the sealing element 321'.

Of course, in the previously described embodiments of fig. 4-6, the spacer 322 may also be provided with a similar axial projection to limit the amount of compression of the seal 321.

Similarly, in other solutions, the sealing structures in the two embodiments of the valve core component can be combined with each other to form a new structure of the valve core component, for example, the sealing structure between the spacer and the sealing member adopts the solutions shown in fig. 4 to 6, and the sealing structure between the pressing block and the sealing member adopts the solutions shown in fig. 7 to 9.

It is right above that the utility model provides a three-way valve and case part all introduce in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The valve core component of the three-way valve comprises a connecting shaft (310) and is characterized by further comprising two sealing assemblies sleeved on the connecting shaft (310), wherein the two sealing assemblies are arranged at intervals of a preset distance;

the sealing assembly comprises a sealing element (321, 321 '), and a cushion block (322, 322 ') and a pressing block (323, 323 ') which are positioned at two sides of the sealing element (321, 321 '), wherein the cushion block (322, 322 ') and the pressing block (323, 323 ') are fixedly sleeved on the connecting shaft (310) and press and fix the sealing element (321, 321 '); the pressing blocks (323, 323') of the two sealing assemblies are arranged oppositely;

a first sealing structure is formed between the cushion block (322, 322 ') and the sealing element (321, 321'), and a second sealing structure is formed between the pressing block (323, 323 ') and the sealing element (321, 321').

2. The spool member of claim 1, wherein the first sealing structure comprises a first sealing groove (3221) formed in the spacer (322) and a first sealing protrusion (3211) formed in the seal member (321), the first sealing protrusion (3211) being snap-fitted into the first sealing groove (3221), or the first sealing structure comprises a first sealing protrusion (3221 ') formed in the spacer (322'), the first sealing protrusion (3221 ') being embedded into the seal member (321').

3. The spool member according to claim 1, characterized in that the second seal structure comprises a second seal groove (3231) formed in the pressing block (323) and a second seal projection (3212) formed in the seal (321), the second seal projection (3212) being snap-fitted into the second seal groove (3231), or the second seal structure comprises a second seal projection (3231 ') formed in the pressing block (323'), the second seal projection (3231 ') being fitted into the seal (321').

4. A spool member according to any one of claims 1 to 3, characterised in that the spacer (322 ') comprises an annular body and an axial boss (3222 ') projecting axially along the inner edge of the annular body in the direction of the pressure piece (323 '), the axial boss (3222 ') being inserted into the bore of the seal member (321 ').

5. The spool component according to any of the claims 1 to 3, characterized in that the spacer (322, 322') is fixedly connected with the connecting shaft (310) by interference fit or welding.

6. The spool component according to any one of claims 1 to 3, characterized in that the pressing piece (323, 323') is fixedly connected with the connecting shaft (310) by interference fit or welding.

7. The spool component according to any one of claims 1 to 3, characterized in that the outer periphery of the pressing piece (323, 323 ') extends axially in the direction of the spacer block (322, 322 ') to form a limit convex part (3232, 3232 '), and the limit convex part (3232, 3232 ') abuts against the outer periphery of the sealing member (321, 321 ').

8. A spool member according to any one of claims 1 to 3, characterised in that the connecting shaft (310) has a first annular step surface (311) towards one end thereof, the pressing piece (323, 323') of one of the sealing assemblies abutting the first annular step surface (311).

9. The spool member of claim 8, wherein the connecting shaft (310) further has a second annular step surface (312) towards its other end, the press piece (323, 323') of the other of the seal assemblies abutting the second annular step surface (312).

10. The three-way valve comprises a valve body component (100), wherein the valve body component (100) is provided with a refrigerant inlet (122), a condensation interface (112) and an evaporation interface (123), an inner cavity of the valve body component (100) is also provided with a first valve port (131) and a second valve port (121), the refrigerant inlet (122) is communicated with the condensation interface (112) through the first valve port (131), and the refrigerant inlet (122) is communicated with the evaporation interface (123) through the second valve port (121); characterized by further comprising a valve core member (300) according to any one of claims 1 to 9, the valve core member (300) being movable in the axial direction of the valve body member (100) to open one of the first valve port (131) and the second valve port (121) and close the other.

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