CN218670772U - Four-way valve - Google Patents

Abstract

The application relates to a four-way valve, the four-way valve includes first takeover, first connector and the main valve body, the internal valve pocket that is equipped with of main valve, the main valve body is connected and through first connector intercommunication valve pocket to first takeover, be equipped with the sliding valve subassembly in the valve pocket, the switching-over in order to realize the four-way valve can be removed in the valve pocket to the sliding valve subassembly, the sliding valve subassembly still is equipped with the choked flow structure, the choked flow structure is equipped with first sealing member and second sealing member. The first sealing part and the second sealing part can move towards the direction close to or far away from the first connecting port respectively to the first connecting port is plugged or opened, a first connecting strip is arranged between the first sealing part and the second sealing part, and a side end face of the first connecting port close to the first sealing part, a side end face of the first connecting port close to the second sealing part and a side end face of the first connecting strip close to the first connecting port are located on the same plane. The four-way valve solves the problem that the flow resisting structure is not tightly sealed with the connector, so that the flow resisting effect of the flow resisting structure is reduced.

Description

Four-way valve

Technical Field

The application relates to the technical field of heat exchange equipment, in particular to a four-way valve.

Background

In the technical field of heat exchange equipment, the refrigerant generates backflow phenomenon in the refrigerant circulating system due to pressure change or pipeline oscillation, and the backflow refrigerant impacts the refrigerant circulating system, so that the service life of the whole refrigerant circulating system is shortened. In order to prevent the refrigerant from flowing backwards, a flow resisting structure is always movably arranged in a valve cavity of the four-way valve to block the connector. The choked flow structure can be equipped with the sealing member that carries out the shutoff to the interface, and the surface of choked flow structure is all located in the protrusion of a plurality of sealing members. Under the impact of external force, the sealing element is easy to sink into the interface to collide with the interface. The long-time collision easily causes the abrasion of the sealing element, so that the sealing between the flow resisting structure and the interface is not tight, the refrigerant is leaked, and the flow resisting effect of the flow resisting structure is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, a four-way valve is needed to solve the problem that the flow resisting structure and the joint are not sealed tightly, so that the refrigerant is leaked, and the flow resisting effect of the flow resisting structure is reduced.

Specifically, the four-way valve provided by the application comprises a first connecting pipe and a main valve body. The main valve body is internally provided with a valve cavity, the first connecting pipe is arranged at a first joint of the main valve body, the valve cavity is internally provided with a flow resisting structure, and a first sealing piece and a second sealing piece are arranged on the end face, close to one side of the first connecting pipe, of the flow resisting structure. The choke structure can drive first sealing member and move towards the direction of being close to or keeping away from first connecting port, and first connecting port all can be shutoff or opened to first sealing member and second sealing member, is equipped with first connecting strip between first sealing member of second sealing member and the second sealing member, and a side terminal surface that first sealing member is close to first connecting port, a side terminal surface that second sealing member is close to first connecting port and a side terminal surface that first connecting strip is close to first connecting port are located the coplanar.

In one embodiment, a direction between two ends of the flow resisting structure is an axial direction of the main valve body, a second connecting strip is arranged between the first sealing element and one end of the flow resisting structure, a third connecting strip is arranged between the second sealing element and the other end of the flow resisting structure, a side end face of the first sealing element close to the first connecting port, a side end face of the second sealing element close to the first connecting port, a side end face of the first connecting strip close to the first connecting port, a side end face of the second connecting strip close to the first connecting port, and a side end face of the third connecting strip close to the first connecting port are located on the same plane. It can be understood that, by the arrangement, the sealing performance of the first connection part of the four-way valve is improved.

In one embodiment, a side end surface of the second connecting strip close to the first connecting port, a side end surface of the first sealing element close to the first connecting port, a side end surface of the first connecting strip close to the first connecting port, a side end surface of the second sealing element close to the first connecting port, and a side end surface of the third connecting strip close to the first connecting port are sequentially and smoothly connected to form a continuous first plane. It can be understood that, so set up for first plane can smoothly slide along the first connection department of cross valve, thereby when having improved the cross valve switching-over, first sealing member or second sealing member and first connection department clearance fit's stability.

In one embodiment, the second connecting strip, the first sealing element, the first connecting strip, the second sealing element and the third connecting strip form a sealing structure, and the sealing structure is made of one of nitrile rubber, silicon rubber or fluorine rubber. It can be understood that, by adopting the arrangement, the service life of the sealing structure is prolonged or the sealing structure can keep good service performance under high-temperature conditions.

In one embodiment, the second connecting strip, the first sealing member, the first connecting strip, the second sealing member and the third connecting strip are integrally formed. It can be understood that, by the arrangement, the processing difficulty of the sealing structure is reduced, and the structural strength of the sealing structure is improved.

In one embodiment, the first connecting strip, the second connecting strip and the third connecting strip have the same width in the direction perpendicular to the axial direction of the main valve body and/or the first connecting strip, the second connecting strip and the third connecting strip protrude from the flow blocking structure at the same height from the end face of the flow blocking structure on the side close to the first connection port. It can be understood that, by the arrangement, the sealing structure is regular in shape and uniform in thickness, so that the processing difficulty of the four-way valve of the sealing structure is further reduced.

In one embodiment, the first sealing element is provided with a first sealing groove which is opened towards the first connecting port, and the maximum cross-sectional area of the first sealing groove is larger than that of the first connecting port; and/or the second sealing element is provided with a second sealing groove with an opening facing the first connecting port, and the maximum cross-sectional area of the second sealing groove is larger than that of the first connecting port. It will be appreciated that so arranged, the sealing of the first or second seal with the first valve seat is enhanced.

In one embodiment, the inner wall of the first sealing groove is spherical, and the inner wall of the first sealing groove is concave towards the direction far away from the first connecting port; and/or the inner wall of the second sealing groove is spherical, and the inner wall of the second sealing groove is sunken towards the direction far away from the first connecting port. It can be understood that, by such an arrangement, the refrigerant can push the flow blocking structure to move towards the direction away from the first connecting pipe, so that the first connecting pipe and the valve cavity can be communicated quickly.

In one embodiment, the outer contour of the first sealing element is circular, so that an annular first sealing ring is formed between the outer wall of the first sealing element and the inner wall of the first sealing groove, and the flow resisting structure can separate the first connecting pipe and the valve cavity through the first sealing ring; the outer contour of the second sealing element is circular, so that an annular second sealing ring is formed between the outer wall of the second sealing element and the inner wall of the second sealing groove, and the flow resisting structure can separate the first connecting pipe and the valve cavity through the second sealing ring. It will be appreciated that the arrangement is such that either the first seal ring or the second seal ring forms a line seal with the second plane of the first valve seat, thereby further enhancing the sealing of the second seal member in cooperation with the first valve seat.

In one embodiment, the projected areas s of the first sealing ring 556, the second sealing ring 557, the first connecting bar 553, the second connecting bar 554 and the third connecting bar 555 at the plane of the first connecting port 58a ₁ A projected area s of an end surface of the choke structure 55 facing away from the first connection port 58a at a plane where the first connection port 58a is located ₂ Satisfy, s ₁ ＜s ₂ . It can be understood that, by the arrangement, the difficulty of plugging the first connecting port by the sealing structure is reduced.

The application provides a cross valve, when the slide valve subassembly was located first preset position, got into first takeover refrigerant promotion choked flow structure from the compressor exhaust end and removed in order to communicate first takeover and valve pocket towards the direction of keeping away from first connector. When the refrigerant has a backflow trend that the refrigerant flows from the valve cavity to the first connecting pipe, the refrigerant pushes the flow resisting structure to move towards the direction close to the first connecting port and block the first connecting port through the first sealing element, and therefore communication between the first connecting pipe and the valve cavity is cut off. Similarly, when the slide valve assembly is located at the second preset position, refrigerant entering the first connecting pipe from the discharge end of the compressor pushes the flow blocking structure to move towards a direction away from the first connecting port so as to communicate the first connecting pipe with the valve cavity. When the refrigerant has a backflow trend of flowing from the valve cavity to the first connecting pipe, the refrigerant pushes the flow resisting structure to move towards the direction close to the first connecting port and block the first connecting port through the second sealing element, and therefore communication between the first connecting pipe and the valve cavity is cut off. Furthermore, because a first connecting bar extending along the axial direction of the main valve body is arranged between the first sealing element and the second sealing element, one side end face of the first sealing element close to the first connecting port, one side end face of the second sealing element close to the first connecting port and one side end face of the first connecting bar close to the first connecting port are positioned on the same plane. Therefore, when the sliding valve assembly drives the flow blocking structure to move from the first preset position to the second preset position along the axial direction of the main valve body, or move from the second preset position to the first preset position, the first connecting strip plays a role in guiding, the problem that the edge of the first sealing element or the edge of the second sealing element collides with the edge of the first connecting port in the moving process to cause the curling damage of the first sealing element or the second sealing element can be avoided, and then the refrigerant flows into the first connecting pipe from the valve cavity is caused, namely, the arrangement is carried out, and the sealing performance of the first connecting port of the four-way valve is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of a four-way valve according to one embodiment provided herein;

FIG. 2 is a schematic illustration of a flow blocking structure and a spool valve assembly in one embodiment as provided herein;

FIG. 3 is a cross-sectional view of a four-way valve according to another embodiment provided herein.

Reference numerals are as follows: 1. a first adapter tube; 2. a second connection pipe; 3. a third connection pipe; 4. a fourth connection pipe; 5. a main valve body; 51. a valve cavity; 52. a spool valve assembly; 521. a first piston; 522. a second piston; 523. a slider; 523a, an inner cavity; 524. a guide frame; 54. a first valve seat; 541. a first through hole; 542. a second plane; 55. a flow-impeding structure; 551. a first seal member; 551a, a first sealing groove; 552. a second seal member; 552a, a second seal groove; 553. a first connecting bar; 554. a second connecting strip; 555. a third connecting strip; 556. a first seal ring; 557. a second seal ring; 58a, a first connection port; 58b and a second connection port; 58c and a third connection port; 58d and a fourth connection port; 59. a second valve seat; 591. a second through hole; 592. a third through hole; 593. a fourth via hole; 6. a first valve body; 61. a first hydraulic chamber; 63. a first seal section; 7. a second valve body; 71. a second hydraulic chamber; 73. a second seal section; 8. A pilot valve; 81. a first capillary tube; 82. a second capillary tube; 83. a fourth capillary tube; 84. a third capillary.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the technical field of heat exchange equipment, the refrigerant generates backflow phenomenon in the refrigerant circulating system due to pressure change or pipeline oscillation, and the backflow refrigerant impacts the refrigerant circulating system, so that the service life of the whole refrigerant circulating system is shortened. In order to prevent the refrigerant from flowing backwards, a flow resisting structure is always movably arranged in a valve cavity of the four-way valve to block the connector. The flow resisting structure can be provided with sealing elements for plugging the interface, and the sealing elements all protrude out of the surface of the flow resisting structure. Under the impact action of external force, the sealing element is easy to sink into the interface to collide with the interface. The long-time collision easily causes the abrasion of the sealing element, so that the sealing between the flow resisting structure and the interface is not tight, the refrigerant is leaked, and the flow resisting effect of the flow resisting structure is reduced.

Referring to fig. 1-2, in order to improve the sealing performance of the flow blocking structure and the interface, a four-way valve is provided. Specifically, the four-way valve includes a first connection pipe 1, a first connection port 58a and a main valve body 5, a valve cavity 51 is arranged in the main valve body 5, one end of the first connection pipe 1 is connected to the exhaust end of the compressor, the other end of the first connection pipe is connected to the main valve body 5 and communicated with the valve cavity 51 through the first connection port 58a, a slide valve assembly 52 is arranged in the valve cavity 51, the slide valve assembly 52 can move in the axial direction of the main valve body 5 to achieve reversing of the four-way valve, a flow blocking structure 55 is further arranged at one end of the slide valve assembly 52 close to the first connection port 58a, and a first sealing part 551 and a second sealing part 552 are arranged on one side end face of the flow blocking structure 55 close to the first connection pipe 1.

When spool valve assembly 52 moves to a first predetermined position along the axial direction of main valve body 5, flow-blocking structure 55 can drive first sealing element 551 to move toward or away from first connection port 58a to block or open first connection port 58a, and when spool valve assembly 52 moves to a second predetermined position along the axial direction of main valve body 5, flow-blocking structure 55 can drive second sealing element 552 to move toward or away from first connection port 58a to block or open first connection port 58a; a first connecting strip 553 is arranged between the first sealing member 551 and the second sealing member 552, and a side end face of the first sealing member 551 close to the first connecting port 58a, a side end face of the second sealing member 552 close to the first connecting port 58a and a side end face of the first connecting strip 553 close to the first connecting port 58a are located on the same plane.

It should be noted that the "first preset position" refers to: the position of the spool valve assembly 52 within the valve cavity 51 when the four-way valve is in a cooling condition. The "second preset position" refers to: the position of the spool valve assembly 52 within the valve cavity 51 when the four-way valve is in the heating mode.

When the sliding valve assembly 52 is located at the first preset position, the refrigerant entering the first connecting pipe 1 from the discharge end of the compressor pushes the flow blocking structure 55 to move away from the first connecting port 58a to communicate the first connecting pipe 1 with the valve chamber 51. When the refrigerant has a backflow tendency to flow from the valve chamber 51 to the first connection pipe 1, the refrigerant pushes the flow blocking structure 55 to move toward the direction close to the first connection port 58a and blocks the first connection port 58a through the first sealing member 551, so as to block the communication between the first connection pipe 1 and the valve chamber 51. Likewise, when the sliding valve assembly 52 is located at the second preset position, the refrigerant entering the first connection pipe 1 from the discharge end of the compressor pushes the flow blocking structure 55 to move away from the first connection port 58a to communicate the first connection pipe 1 with the valve chamber 51. When the refrigerant has a backflow tendency to flow from the valve chamber 51 to the first connection pipe 1, the refrigerant pushes the flow blocking structure 55 to move toward the direction close to the first connection port 58a and blocks the first connection port 58a through the second sealing member 552, so as to block the communication between the first connection pipe 1 and the valve chamber 51. Further, due to the first connecting bar 553 provided between the first seal 551 and the second seal 552, an end surface of the first seal 551 on a side close to the first connection port 58a, an end surface of the second seal 552 on a side close to the first connection port 58a, and an end surface of the first connecting bar 553 on a side close to the first connection port 58a are located on the same plane. Therefore, when the spool valve assembly 52 drives the flow blocking structure 55 to move from the first preset position to the second preset position along the axial direction of the main valve body 5, or to move from the second preset position to the first preset position, the first connecting strip 553 plays a guiding role, and can avoid the problem that the edge of the first sealing member 551 or the edge of the second sealing member 552 collides with the edge of the first connecting port 58a during the moving process to cause the curling damage of the first sealing member 551 or the second sealing member 552, thereby causing the refrigerant to flow into the first connecting pipe 1 from the valve cavity 51, that is, the sealing performance at the first connecting port 58a of the four-way valve is improved.

In summary, the four-way valve provided by the application improves the sealing effect between the flow blocking structure 55 and the first connection port 58a in the reversing process of the four-way valve, and further improves the flow blocking effect of the flow blocking structure 55.

In one embodiment, as shown in fig. 2, the direction between the two ends of the flow blocking structure 55 is the axial direction of the main valve body 5, a second connecting strip 554 is disposed between the first sealing member 551 and one end of the flow blocking structure 55, a third connecting strip 555 is disposed between the second sealing member 552 and the other end of the flow blocking structure 55, and a side end surface of the first sealing member 551 close to the first connection port 58a, a side end surface of the second sealing member 552 close to the first connection port 58a, a side end surface of the first connecting strip 553 close to the first connection port 58a, a side end surface of the second connecting strip 554 close to the first connection port 58a, and a side end surface of the third connecting strip 555 close to the first connection port 58a are located on the same plane.

By providing the second connecting strip 554, when the first sealing member 551 is in sealing fit with the first connecting port 58a, the problem that the edge of the first sealing member 551 away from the first connecting strip 553 collides with the edge of the first connecting port 58a to cause the first sealing member 551 to be curled and damaged, thereby causing the refrigerant to flow into the first connecting pipe 1 from the valve chamber 51 can be avoided. With this arrangement, the sealing performance at the first connection port 58a of the four-way valve is improved.

In an embodiment, the second connecting strip 554, the first seal 551, the first connecting strip 553, the second seal 552 and the third connecting strip 555 are distributed in sequence along the axial direction of the main valve body 5.

In this manner, the second connecting rod 554, the first seal 551, the first connecting rod 553, the second seal 552, and the third connecting rod 555 are distributed in a direction consistent with a moving direction of the spool valve assembly 52 in the valve chamber 51, thereby facilitating the spool valve assembly 52 to bring the flow blocking structure 55 into sealing engagement with the first port 58a via the first seal 551 and the second seal 552.

Further, by providing the third connecting strip 555, when the second sealing element 552 is in sealing fit with the first connection port 58a, a problem that the edge of the second sealing element 552 far from the first connecting strip 553 collides with the edge of the first connection port 58a to cause a curling damage to the second sealing element 552, so that the refrigerant flows into the first connection pipe 1 from the valve chamber 51 can be avoided. With this arrangement, the sealing performance at the first connection port 58a of the four-way valve is improved.

In one embodiment, an end surface of the second connecting bar 554 near the first port 58a, an end surface of the first seal 551 near the first port 58a, an end surface of the first connecting bar 553 near the first port 58a, an end surface of the second seal 552 near the first port 58a, and an end surface of the third connecting bar 555 near the first port 58a are smoothly connected to form a continuous first plane.

So set up, make the first plane smoothly slide along the first interface 58a of the four-way valve, thus has improved the stability that the first sealing member 551 or the second sealing member 552 cooperates with the first interface 58a activity when the four-way valve commutates.

Further, in an embodiment, as shown in fig. 1, a first valve seat 54 is disposed in the valve chamber 51, the first connecting pipe 1 extends into the first valve seat 54 and communicates with the valve chamber 51 through a first connecting port 58a, and an end surface of the first valve seat 54 close to the first connecting strip 553 is defined as a second plane 542, and the first plane can be closely attached to the second plane 542.

So set up for first plane can closely laminate second plane 542 and steadily slide, thereby when further having improved the cross valve switching-over, first sealing member 551 or second sealing member 552 and first connecting port 58a clearance fit's stability, and then prevent that the refrigerant from the valve chamber 51 refluence and get into first takeover 1, further improved the choked flow effect of choked flow structure 55.

Further, in an embodiment, the second connecting strip 554, the first sealing member 551, the first connecting strip 553, the second sealing member 552 and the third connecting strip 555 form a sealing structure, and the sealing structure is made of one of nitrile rubber, silicon rubber or fluorine rubber.

The wear resistance of the nitrile rubber and the silicon rubber is better, so that the service life of the sealing structure can be prolonged. The hydrogenated nitrile rubber has good heat resistance, so that the sealing structure can keep good service performance under a high-temperature condition.

Further, in one embodiment, the second connecting strip 554, the first seal 551, the first connecting strip 553, the second seal 552, and the third connecting strip 555 are integrally formed.

So set up, reduced seal structure's the processing degree of difficulty to, seal structure's structural strength has been improved. Specifically, in one embodiment, the second connecting bar 554, the first seal 551, the first connecting bar 553, the second seal 552, and the third connecting bar 555 are formed by one of lathe forming, punch forming, or cast molding.

But not limited thereto, the second connecting bar 554, the first seal 551, the first connecting bar 553, the second seal 552, and the third connecting bar 555 may also be welded.

In an embodiment, as shown in fig. 2, the widths of the first connecting strip 553, the second connecting strip 554 and the third connecting strip 555 in the direction perpendicular to the axial direction of the main valve body 5 are equal.

Thus, it is advantageous to reduce the difficulty in processing the first connecting bar 553, the second connecting bar 554, and the third connecting bar 555.

Further, in an embodiment, the first connecting bar, the second connecting bar 554 and the third connecting bar 555 protrude from the spoiler structure 55 at the same height near the side of the first connecting port 58 a.

So set up for seal structure shape rule and thickness are even, thereby further reduced the processing degree of difficulty of cross valve.

In one embodiment, as shown in fig. 2, the first seal 551 is provided with a first seal groove 551a opened toward the first connection port 58a, and a maximum cross-sectional area of the first seal groove 551a is larger than a cross-sectional area of the first connection port 58 a.

In this way, when the refrigerant pushes the flow blocking structure 55 to move toward the direction close to the first connecting pipe 1 until the first sealing member 551 is engaged with the second plane 542 of the first valve seat 54, the first sealing groove 551a can completely cover the first connecting port 58a, so that the sealing performance of the first sealing member 551 in cooperation with the first valve seat 54 is enhanced.

In another embodiment, as shown in FIG. 2, second seal 552 has a second seal groove 552a opening toward first port 58a, and second seal groove 552a has a maximum cross-sectional area greater than the cross-sectional area of first port 58 a.

In this way, when the refrigerant pushes the flow blocking structure 55 to move toward the direction close to the first nozzle 1 until the second sealing member 552 fits the second plane 542 of the first valve seat 54, the second sealing groove 552a can completely cover the first connection port 58a, so that the sealing performance of the second sealing member 552 in cooperation with the first valve seat 54 is enhanced.

In one embodiment, as shown in fig. 2, the inner wall of the first sealing groove 551a is spherical, and the inner wall of the first sealing groove 551a is concave toward a direction away from the first connection port 58 a.

Thus, when the refrigerant flows from the first connecting pipe 1 to the flow blocking structure 55, the spherical first seal groove 551a increases the force-bearing area of the flow blocking structure 55, and further increases the pressure on the end surface of one side of the flow blocking structure 55 close to the first connecting pipe 1, which is beneficial for the refrigerant to push the flow blocking structure 55 to move towards the direction far away from the first connecting pipe 1, thereby being beneficial for fast communication between the first connecting pipe 1 and the valve cavity 51.

In another embodiment, as shown in fig. 2, the inner wall of the second sealing groove 552a is spherical, and the inner wall of the second sealing groove 552a is concave toward a direction away from the first connection port 58 a.

Thus, when the refrigerant flows from the first connecting pipe 1 to the flow blocking structure 55, the spherical second seal groove 552a increases the stressed area of the flow blocking structure 55, so as to increase the pressure on one side end surface of the flow blocking structure 55 close to the first connecting pipe 1, which is beneficial for the refrigerant to push the flow blocking structure 55 to move towards the direction away from the first connecting pipe 1, thereby being beneficial for fast communication between the first connecting pipe 1 and the valve chamber 51.

In an embodiment, as shown in fig. 2, the outer profile of the first sealing member 551 is circular, so that an annular first sealing ring 556 is formed between the outer wall of the first sealing member 551 and the inner wall of the first sealing groove 551a, and the flow blocking structure 55 can block the first connecting pipe 1 and the valve cavity 51 through the first sealing ring 556.

In this manner, the first sealing ring 556 forms a line seal with the second flat surface 542 of the first valve seat 54, further enhancing the sealing ability of the first sealing member 551 with respect to the first valve seat 54.

In another embodiment, as shown in fig. 2, the outer profile of the second sealing member 552 is circular, so that an annular second sealing ring 557 is formed between the outer wall of the second sealing member 552 and the inner wall of the second sealing groove 552a, and the flow blocking structure 55 can block the first connecting pipe 1 and the valve chamber 51 through the second sealing ring 557.

In this way, the second sealing ring 557 forms a line seal with the second plane 542 of the first valve seat 54, and the sealing performance of the second sealing member 552 in cooperation with the first valve seat 54 is further enhanced.

In one embodiment, the projected areas s of the first sealing ring 556, the second sealing ring 557, the first connecting bar 553, the second connecting bar 554 and the third connecting bar 555 at the plane of the first connecting port 58a ₁ A projected area s of an end surface of the choke structure 55 facing away from the first connection port 58a at a plane where the first connection port 58a is located ₂ Satisfy, s ₁ ＜s ₂ 。

That is, in the present embodiment, the area of the first plane of the seal structure is smaller than the area of the end surface of the choke structure 55 on the side facing away from the first connection port 58 a. So set up, when first interface 58a of seal structure shutoff, the atress area of the first plane of seal structure is less than the atress area that one side terminal surface that choked flow structure 55 deviates from first interface 58a to one side terminal surface that choked flow structure 55 deviates from first interface 58a receives less pressure and can make choked flow structure 55 and rather than fixed connection's seal structure be in the stress balance state, thereby has reduced the degree of difficulty of first interface 58a of seal structure shutoff.

Referring to fig. 3, generally, the four-way valve includes a first connection pipe 1, a second connection pipe 2, a third connection pipe 3, and a fourth connection pipe 4, and the first connection pipe 1, the second connection pipe 2, the third connection pipe 3, and the fourth connection pipe 4 are all connected to a main valve body 5. And the first connecting pipe 1 is used for connecting the exhaust port of the compressor, the second connecting pipe 2 is used for connecting the evaporator, the third connecting pipe 3 is used for connecting the air suction port of the compressor, and the fourth connecting pipe 4 is used for connecting the condenser.

Further, in an embodiment, as shown in fig. 3, the side wall of the main valve body 5 is provided with a first connection port 58a, a second connection port 58b, a third connection port 58c, and a fourth connection port 58d. The first connection port 58a is provided with a first connection pipe 1, the second connection port 58b is provided with a second connection pipe 2, the third connection port 58c is provided with a third connection pipe 3, and the fourth connection port 58d is provided with a fourth connection pipe 4.

Further, the first connection port 58a is provided on one side of the main valve body 5, and the second connection port 58b, the third connection port 58c, and the fourth connection port 58d are provided on the other side of the main valve body 5 and are arranged along the axial direction of the main valve body 5. The slider 523 has an inner cavity 523a, and the third connection port 58c communicates with the second connection port 58b through the inner cavity 523a, or the third connection port 58c communicates with the fourth connection port 58d through the inner cavity 523 a.

Still further, a second valve seat 59 is provided in the main valve body 5. The first valve seat 54 is provided with a first through hole 541 corresponding to the first connection port 58 a. The second valve seat 59 is provided with a second through hole 591, a third through hole 592, and a fourth through hole 593 corresponding to the second, third, and fourth connection ports 58b, 58c, and 58d, respectively. The first connection pipe 1 sequentially passes through the first connection port 58a and the first through hole 541 to be communicated with the valve chamber 51, and the outer wall of the first connection pipe 1 is fixedly connected with the inner wall of the first valve seat 54 located in the first through hole 541, including but not limited to welding, clamping and screwing. The second connection pipe 2 sequentially passes through the second connection port 58b and the second through hole 591 to communicate with the valve cavity 51, and the outer wall of the second connection pipe 2 is fixedly connected with the inner wall of the second valve seat 59 located in the second through hole 591, including but not limited to welding, clamping and screwing. The third connection pipe 3 sequentially passes through the third connection port 58c and the third through hole 592 to communicate with the valve chamber 51, and the outer wall of the third connection pipe 3 and the inner wall of the second valve seat 59 in the third through hole 592 are fixedly connected, including but not limited to welding, clamping and screwing. The fourth connection pipe 4 sequentially passes through the fourth connection port 58d and the fourth through hole 593 to be communicated with the valve chamber 51, and the outer wall of the fourth connection pipe 4 and the inner wall of the second valve seat 59 located in the fourth through hole 593 are fixedly connected, including but not limited to welding, clamping and threaded connection.

As shown in fig. 3, the four-way valve further includes a pilot valve 8, a first capillary tube 81, a second capillary tube 82, a third capillary tube 84, and a fourth capillary tube 83. Wherein, one end of the first capillary 81 is connected to the pilot valve 8, and the other end is connected to the first inserting hole at the side of the first connecting pipe 1 and communicated with the first connecting pipe 1; one end of the second capillary tube 82 is connected to the pilot valve 8, and the other end is connected to the second insertion hole at the side of the first sealing section 63 and communicated with the first hydraulic cavity 61; one end of the third capillary tube 84 is connected to the pilot valve 8, and the other end is connected to a third inserting hole at the side part of the third connecting pipe 3 and communicated with the third connecting pipe 3; one end of the fourth capillary 83 is connected to the pilot valve 8, and the other end is connected to a fourth plug hole at the side of the second sealing section 73 and communicated with the second hydraulic chamber 71.

The application provides a process that the cross valve heats the operating mode and switches with the refrigeration operating mode in air conditioning equipment, also the process that the cross valve commutates as follows:

one part of the high-pressure refrigerant from the compressor enters the valve cavity 51 through the first connecting pipe 1, the other part of the high-pressure refrigerant enters the pilot valve 8 from the first capillary pipe 81, at the moment, the pilot valve 8 is opened, and the pilot valve 8 controls the first capillary pipe 81 to be communicated with the fourth capillary pipe 83. Part of the refrigerant entering the first capillary tube 81 enters the second hydraulic chamber 71 through the fourth capillary tube 83, the high-pressure refrigerant pushes the second piston 522 to move toward the direction close to the valve chamber 51, the second hydraulic chamber 71 becomes larger, the second piston 522 drives the first piston 521 to move in the same direction through the guide frame 524 and compress the first hydraulic chamber 61 until the first piston 521 abuts against the end portion of the first valve body 6 close to the main valve body 5. At this time, the sliding block 523 moves to the second through hole 591 and the third through hole 592, the inner cavity 523a of the sliding block 523 is communicated with the second connecting pipe 2 and the third connecting pipe 3 through the second through hole 591 and the third through hole 592, the refrigerant entering the valve cavity 51 from the first connecting pipe 1 is discharged out of the four-way valve from the fourth connecting pipe 4, and sequentially flows through the outdoor heat exchanger, the throttling assembly and the compressor, thereby realizing the refrigeration cycle;

then, the pilot valve 8 is closed, the pilot valve 8 controls the first capillary tube 81 and the second capillary tube 82 to communicate, a part of the refrigerant entering the first capillary tube 81 enters the first hydraulic pressure chamber 61 through the second capillary tube 82, the high-pressure refrigerant pushes the first piston 521 to move toward the direction close to the valve cavity 51, the first hydraulic pressure chamber 61 is enlarged, the first piston 521 drives the second piston 522 to move in the same direction through the guide frame 524 and compress the second hydraulic pressure chamber 71 until the second piston 522 abuts against one side end of the second valve body 7 close to the main valve body 5. At this time, the slider 523 moves to the third through hole 592 and the fourth through hole 593, the inner cavity 523a of the slider 523 communicates with the third connecting pipe 3 and the fourth connecting pipe 4 through the third through hole 592 and the fourth through hole 593, the refrigerant entering the valve chamber 51 from the first connecting pipe 1 is discharged out of the four-way valve from the second connecting pipe 2, and sequentially flows through the indoor heat exchanger, the throttling assembly, the outdoor heat exchanger and the compressor, thereby realizing a heating cycle.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (10)

1. A four-way valve is characterized by comprising a first connecting pipe (1) and a main valve body (5); a valve cavity (51) is arranged in the main valve body (5), the first connecting pipe (1) is arranged at a first connecting port (58 a) of the main valve body (5),

a flow resisting structure (55) is arranged in the valve cavity (51), and a first sealing piece (551) and a second sealing piece (552) are arranged on one side end face, close to the first connecting port (58 a), of the flow resisting structure (55); the flow resisting structure (55) can drive the first sealing member (551) and the second sealing member (552) to move towards the direction close to or away from the first connecting port (58 a), and both the first sealing member (551) and the second sealing member (552) can block or open the first connecting port (58 a),

a first connecting strip (553) is arranged between the first sealing member (551) and the second sealing member (552), and an end surface of one side of the first sealing member (551) close to the first connecting port (58 a), an end surface of one side of the second sealing member (552) close to the first connecting port (58 a) and an end surface of one side of the first connecting strip (553) close to the first connecting port (58 a) are positioned on the same plane.

2. Four-way valve according to claim 1, wherein the direction between the two ends of the flow blocking structure (55) is the axial direction of the main valve body (5); a second connecting strip (554) is arranged between the first sealing element (551) and one end of the flow blocking structure (55), a third connecting strip (555) is arranged between the second sealing element (552) and the other end of the flow blocking structure (55),

an end face of the first seal member (551) adjacent to the first port (58 a), an end face of the second seal member (552) adjacent to the first port (58 a), an end face of the first connecting bar (553) adjacent to the first port (58 a), an end face of the second connecting bar (554) adjacent to the first port (58 a), and an end face of the third connecting bar (555) adjacent to the first port (58 a) are located on the same plane.

3. The four-way valve according to claim 2, wherein an end surface of the second connecting bar (554) adjacent to the first port (58 a), an end surface of the first seal (551) adjacent to the first port (58 a), an end surface of the first connecting bar (553) adjacent to the first port (58 a), an end surface of the second seal (552) adjacent to the first port (58 a), and an end surface of the third connecting bar (555) adjacent to the first port (58 a) are smoothly connected in this order to form a continuous first plane.

4. The four-way valve according to claim 3, wherein the second connecting strip (554), the first sealing member (551), the first connecting strip (553), the second sealing member (552), and the third connecting strip (555) form a sealing structure, and the sealing structure is made of one of nitrile rubber, silicone rubber, or fluorine rubber.

5. The four-way valve of claim 2, wherein the second connecting bar (554), the first seal (551), the first connecting bar (553), the second seal (552), and the third connecting bar (555) are an integrally formed structure.

6. The four-way valve according to claim 2, wherein the first connecting strip (553), the second connecting strip (554) and the third connecting strip (555) have equal widths in a direction perpendicular to the axial direction of the main valve body (5);

and/or the first connecting strip (553), the second connecting strip (554) and the third connecting strip (555) protrude from the end face of the flow blocking structure (55) close to one side of the first connecting port (58 a) to the same height.

7. The four-way valve according to claim 2, wherein the first seal (551) is provided with a first seal groove (551 a) opening toward the first connection port (58 a), the first seal groove (551 a) having a maximum cross-sectional area larger than a cross-sectional area of the first connection port (58 a);

and/or the second sealing element (552) is provided with a second sealing groove (552 a) which opens out towards the first connection opening (58 a), the maximum cross-sectional area of the second sealing groove (552 a) being greater than the cross-sectional area of the first connection opening (58 a).

8. The four-way valve according to claim 7, wherein the inner wall of the first sealing groove (551 a) is spherical, and the inner wall of the first sealing groove (551 a) is concave toward a direction away from the first connection port (58 a);

and/or the inner wall of the second sealing groove (552 a) is spherical, and the inner wall of the second sealing groove (552 a) is concave towards the direction far away from the first connecting port (58 a).

9. The four-way valve according to claim 8, wherein the outer contour of the first seal (551) is circular, so that an annular first sealing ring (556) is formed between the outer wall of the first seal (551) and the inner wall of the first seal groove (551 a), and the flow blocking structure (55) can block the first connecting pipe (1) and the valve chamber (51) by the first sealing ring (556);

and/or the outer contour of the second sealing element (552) is circular, so that an annular second sealing ring (557) is formed between the outer wall of the second sealing element (552) and the inner wall of the second sealing groove (552 a), and the flow blocking structure (55) can block the first connecting pipe (1) and the valve cavity (51) through the second sealing ring (557).

10. The four-way valve according to claim 9, wherein the projected areas s of the first sealing ring (556), the second sealing ring (557), the first connecting bar (553), the second connecting bar (554) and the third connecting bar (555) at the plane of the first connection port (58 a) ₁ A projection area s of a side end face of the flow blocking structure (55) facing away from the first connection port (58 a) on a plane of the first connection port (58 a) ₂ Satisfy s ₁ ＜s ₂ 。

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