Four-way valve

Abstract

The utility model provides a four-way valve which comprises a valve body, a first valve assembly and a second valve assembly, the first valve assembly and the second valve assembly are arranged on the valve body, a first main valve hole is communicated with a second main valve hole through a first channel, and the bottom of the valve body is provided with a second channel communicated with the first main valve hole and the second main valve hole. A second sealing groove is formed in the valve seat body at the joint of the second channel and the first main valve hole and the joint of the second channel and the second main valve hole, a second plastic sealing ring is arranged in the second sealing groove, a first sealing groove is formed in the valve seat body between the two annular receding grooves, and a first plastic sealing ring is arranged in the first sealing groove. The periphery of the lower end of the valve element is matched with the first plastic sealing ring and the second plastic sealing ring, and switching among all connectors of the four-way valve is achieved through the first valve assembly and the second valve assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field, especially a four-way valve. BACKGROUND

[0002] The refrigeration system comprises a compressor, an evaporator, a condenser, a throttling element and a reversing valve, usually adopts an electronic expansion valve as the throttling element, and adopts a four-way valve to switch the refrigerant flow direction. The four-way valve in the prior art usually adopts a ball valve or a planar valve core structure or a four-magnetic-valve combination structure, and the structure is relatively complex, and the manufacturing process is difficult. In addition, the applicant's 201510120619.4 discloses a four-way valve, the outer periphery of the lower end of the valve core is provided with a first sealing ring or a second sealing ring, the first sealing ring and the second sealing ring are both rubber O-rings, and the high-pressure working condition of a carbon dioxide air conditioning system and the like cannot be adapted. SUMMARY

[0003] The utility model aims at providing a four-way valve, which can adapt to the high-pressure working condition of a special medium air conditioning system.

[0004] The utility model provides a four -way valve, including valve body, first valve subassembly, second valve subassembly of setting on the valve body, be equipped with vertical first main valve hole, second main valve hole in the valve body, the third interface that is equipped with with first main valve hole intercommunication in the valve body side, the fourth interface that is equipped with with second main valve hole intercommunication in the valve body side still, first main valve hole is connected with second main valve hole through first channel, first interface connects first channel, the bottom of valve body is equipped with with first main valve hole and second main valve hole intercommunication's second channel, second channel connects second interface, first valve subassembly and second valve subassembly include valve seat, set up in the execution subassembly of valve seat, set up in the drive mechanism for driving execution subassembly on execution subassembly, valve seat includes hollow valve seat body that sets up in first main valve hole and second main valve hole, the valve seat body outer circumferential surface is equipped with two annular let -alone slot, the annular let -alone slot is distributed up and down along the valve seat body axis, the valve seat body side is equipped with with first valve hole and second valve hole that pass through valve seat body, first valve hole and second valve hole are located in two annular let -alone slot respectively, first channel and the first main valve hole and second main valve hole part corresponding to the uppermost annular let -alone slot intercommunication, the third interface and the first main valve hole part corresponding to the lowermost annular let -alone slot intercommunication, the fourth interface and the second main valve hole part corresponding to the lowermost annular let -alone slot intercommunication, the valve seat body side and first main valve hole and second main valve hole inner wall fit, drive mechanism includes sleeve, the rotor that sets up in sleeve, set up in the coil for driving rotor rotation outside sleeve, with the screw rod that the rotor is fixedly connected, with the nut that the screw rod cooperates and with execution subassembly drive connection, execution subassembly includes valve core, the nut and valve core drive connection, the valve core only makes vertical direction movement, the valve seat body in second channel and first main valve hole, second main valve hole junction is equipped with with second sealing groove, sets up second plastic sealing ring in second sealing groove, the valve seat body between two annular let -alone slot is equipped with with first sealing groove, sets up first plastic sealing ring in first sealing groove, when the valve core is in the lower position, the valve core lower end outer circumferential and second plastic sealing ring cooperation seal, second plastic sealing ring seals first main valve hole and second main valve hole with second channel intercommunication place, when the valve core is in the upper position, the valve core lower end outer circumferential and first plastic sealing ring cooperation seal, first plastic sealing ring seals the valve seat body inner cavity between first valve hole and second valve hole.

[0005] In some embodiments, the valve core position in the first main valve hole and the valve core position in the second main valve hole are opposite when in operation. When the valve core position in the first main valve hole is in the lower position, the valve core position in the second main valve hole is in the upper position. When the valve core position in the first main valve hole is in the upper position, the valve core position in the second main valve hole is in the lower position.

[0006] In some embodiments, the first channel and the second channel are parallel to each other, and axes of the first channel and the second channel are perpendicular to axes of the first main valve hole and the second main valve hole.

[0007] In some embodiments, the third interface and the fourth interface are located on a first side of the valve body.

[0008] In some embodiments, axes of the first channel and the second channel are parallel to the first side.

[0009] In some embodiments, the first channel and the second channel are closed by plugs.

[0010] In some embodiments, the first interface and the second interface are located on a second side of the valve body, and the first side and the second side are oppositely arranged.

[0011] In some embodiments, the valve seat body comprises a connecting seat, a first valve seat with a side wall, a second valve seat with a side wall, and a third valve seat with a side wall, which are sequentially fixedly connected, and the second valve seat and the first valve seat and the third valve seat are connected to form a first sealing groove and a second sealing groove.

[0012] In some embodiments, a rubber sealing ring is arranged outside the first plastic sealing ring or the second plastic sealing ring.

[0013] The utility model provides a four-way valve, including valve body, first valve subassembly, second valve subassembly set up on the valve body, first main valve hole is connected with second main valve hole through first channel, the bottom of valve body is equipped with with first main valve hole and second main valve hole intercommunication's second channel, the valve seat body in second channel and first main valve hole, second main valve hole junction place is equipped with second sealing groove, and second plastic sealing ring is arranged in second sealing groove, and the valve seat body between two annular accommodation grooves is equipped with first sealing groove, and first plastic sealing ring is arranged in first sealing groove, and the outer circle of spool lower extreme cooperates with first plastic sealing ring, second plastic sealing ring, realizes switching between each interface of four-way valve through first valve subassembly and second valve subassembly. ACCURATE DRAWINGS

[0014] Figure 1 It is four-way valve structure schematic diagram of the utility model embodiment;

[0015] Figure 2 It is valve seat, executive component and drive mechanism (except coil) structure schematic diagram of the utility model embodiment Figure 1

[0016] Figure 3 It is four-way valve solid structure schematic diagram of the utility model embodiment; ​

[0017] Figure 4 is a valve body three-dimensional structure schematic diagram of the embodiment of the utility model;

[0018] Figure 5 is the utility model embodiment Figure 4 valve body along the second channel axis section structure schematic diagram;

[0019] Figure 6 is the utility model embodiment Figure 4 valve body along the first channel axis section structure schematic diagram.

[0020] Among them, serial number explanation: 1, valve body;11, first interface;12, second interface;13, third interface;14, fourth interface;15, first main valve hole;16, second main valve hole;17, first side face;18, second side face;19, third side face;21, fourth side face;22, first channel;23, second channel;27, sealing pad;28, rubber O type sealing ring;29, rubber O type sealing ring;30, plastic sealing ring;100, drive mechanism;101, sleeve;102, rotor;103, coil;104, screw;105, nut;1051, lug;200, execution assembly;201, valve core;202, first plastic sealing ring;203, second plastic sealing ring;204, first balance hole;205, rubber sealing ring;206, rubber sealing ring;300, valve seat;301, valve seat body;302, annular let -out slot;303, annular let -out slot;304, first valve hole;305, second valve hole;306, second sealing groove;307, first sealing groove;308, third sealing groove;3011, connecting seat;3012, first valve seat;3013, second valve seat;3014, third valve seat;4, support frame;401, recess;5, bearing;80, first valve assembly;90, second valve assembly. DETAILED DESCRIPTION

[0021] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive aspects to those skilled in the art. In the drawings, the thickness of regions and layers can be exaggerated for clarity. Like reference numerals may

[0022] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the application.

[0023] Reference Figures 1 to 5 As shown, according to the four-way valve of the embodiment of the present application, the valve body 1, the first valve assembly 80 and the second valve assembly 90 are arranged on the valve body, the first valve assembly and the second valve assembly comprise a valve seat 300, an actuating assembly 200 arranged in the valve seat, and a driving mechanism 100 arranged on the actuating assembly and used for driving the actuating assembly.

[0024] The valve body is provided with a vertical first main valve hole 15 and a second main valve hole 16, the side surface of the valve body is provided with a third interface 13 communicating with the first main valve hole 15, and the side surface of the valve body is further provided with a fourth interface 14 communicating with the second main valve hole 16, the first main valve hole 11 communicates with the second main valve hole 16 through a first channel 22, the first interface 11 communicates with the first channel 22, and the bottom of the valve body is provided with a second channel 23 communicating with the first main valve hole 15 and the second main valve hole 16, and the second channel communicates with the second interface 12. The first channel and the second channel are parallel to each other, and the axes of the first channel and the second channel are perpendicular to the axes of the first main valve hole and the second main valve hole.

[0025] The axes of the first main valve hole and the second main valve hole are parallel to each other, the common plane of the axes of the first main valve hole and the second main valve hole is defined as a reference plane, the bottom surface and the top surface of the valve body are perpendicular to the axes of the first main valve hole and the second main valve hole, the side surface of the valve body parallel to the reference plane is a first side surface 17 and a second side surface 18, and adjacent side surfaces of the valve body are a third side surface 19 and a fourth side surface 21. The third interface and the fourth interface are located on the first side surface 17 of the same side of the valve body, and can also be located on the second side surface 18 of the same side of the valve body; the first interface and the second interface are located on the first side surface 17 or the second side surface 18 of the same side of the valve body, and are not located on the same side as the third interface and the fourth interface. The first channel and the second channel are drilled through the third side surface 19 or the fourth side surface 21 and then closed by plugs. The threaded holes of the first channel and the second channel have a certain length, the axes of the first channel and the second channel are not in the same plane as the axes of the first main valve hole and the second main valve hole, the threaded holes are offset from the thin-walled part of the valve body, and the threaded holes can be longer. In some embodiments, the first interface and the second interface can also be located on the third side surface or the fourth side surface of the same side of the valve body, the third interface and the fourth interface are located on the second side surface of the same side of the valve body, and pipeline connection is facilitated.

[0026] The valve seat 300 comprises a hollow valve seat body 301 arranged in the first and second main valve holes, the outer periphery of the valve seat body is provided with two annular accommodation grooves 302, 303, which are distributed up and down along the axis of the valve seat body, the side of the valve seat body is provided with a first valve hole 304 and a second valve hole 305 penetrating the valve seat body, and the first valve hole and the second valve hole are respectively located in the two annular accommodation grooves. The first channel 22 communicates with the part of the first main valve hole 15 and the second main valve hole 16 corresponding to the uppermost annular accommodation groove 302, the first channel 22 communicates with the first interface 11, the third interface 13 communicates with the part of the first main valve hole 15 corresponding to the lowermost annular accommodation groove, the fourth interface 14 communicates with the part of the second main valve hole 16 corresponding to the lowermost annular accommodation groove, the second channel 23 communicates with the bottom of the first main valve hole 15 and the second main valve hole 16, and the side of the valve seat body 301 is attached to the inner wall of the first main valve hole and the second main valve hole.

[0027] The driving mechanism 100 comprises a sleeve 101, a rotor 102 arranged in the sleeve, a coil 103 arranged outside the sleeve for driving the rotor to rotate, a screw rod 104 fixedly connected with the rotor, and a nut 105 cooperating with the screw rod and drivingly connected with the actuating assembly.

[0028] The actuating assembly 200 comprises a valve core 201, the nut 105 is drivingly connected with the valve core 201, and the valve core only moves in the vertical direction; the second channel 23 is provided with a second sealing groove 306 at the connection with the first main valve hole 15 and the second main valve hole 16, a second plastic sealing ring 203 is arranged in the second sealing groove, a first sealing groove 307 is arranged in the valve seat body between the two annular accommodation grooves, and a first plastic sealing ring 202 is arranged in the first sealing groove. When the valve core 201 is in the lower position, the lower end of the valve core is sealed in cooperation with the second plastic sealing ring 203, i.e. the second plastic sealing ring seals the communication between the first main valve hole 15 and the second main valve hole 16 and the second channel 23; when the valve core 201 is in the upper position, the lower end of the valve core is sealed in cooperation with the first plastic sealing ring 202, i.e. the first sealing ring 202 seals the inner cavity of the valve seat body between the first valve hole and the second valve hole.

[0029] The valve core upper end has a recess, the nut 105 is accommodated in the recess and fixed with the valve core by the check ring 205 to prevent the nut from coming out. The nut 105 includes a lug 1051, the side wall of the valve core recess has a gap, and the lug of the nut extends out of the gap to prevent the nut from rotating. The valve core has a first balance hole 204 extending through the upper and lower ends. The valve seat body includes an inner hole in clearance fit with the upper end of the valve core. The upper end of the valve core is in clearance fit with the inner hole of the valve seat body, and a plastic sealing ring 30 is arranged between the upper end of the valve core and the valve seat body. The outer diameters of the upper and lower ends of the valve core are equal, and the diameter of the middle section of the valve core is smaller than the diameters of the upper and lower ends, facilitating the flow of the medium. The valve core pressure balance structure is adopted, and the driving torque required for opening or closing of the valve core is not affected by the pressure of each interface. It can be applied to high pressure working conditions and can adapt to the situation that the closed interface has back pressure. The required rotating torque is small, the valve core only moves up and down without rotating, the wear between the valve core and the valve seat is reduced, and the sealing performance is improved.

[0030] In operation, the positions of the valve cores in the first and second main valve holes are opposite. When the valve core in the first main valve hole is in the lower position, the valve core in the second main valve hole is in the upper position. At this time, the first interface and the third interface are connected, and the fourth interface and the second interface are connected. When the valve core in the first main valve hole is in the upper position, the valve core in the second main valve hole is in the lower position. At this time, the second interface and the third interface are connected, and the first interface and the fourth interface are connected. Through the two valve assemblies, switching between the interfaces of the four-way valve is realized. Compared with the combination switching of four electromagnetic valves, the manufacturing cost can be reduced, and the sealing performance of the valve core can be improved.

[0031] Reference Figure 2 As shown, the four-way valve includes a support frame 4 and a bearing 5. The support frame 4 is fixed to the upper end of the valve seat body 301, the bearing is fixed to the upper end of the support frame, the bearing is fixedly connected with the screw rod 104, and the support frame further includes a longitudinal groove 401. The lug of the nut extends into the longitudinal groove to prevent the nut and the valve core from rotating. In other embodiments, the lug is radially extended by a check ring to prevent the valve core from rotating, and a special-shaped check ring is used to prevent the nut from rotating, which can achieve the design purpose.

[0032] Reference Figure 1 、 2As shown in FIGS. 3, the valve seat body 301 comprises a connecting seat 3011, a first valve seat 3012 with a side wall, a second valve seat 3013 with a side wall, and a third valve seat 3014 with a side wall, which are sequentially fixedly connected. The second valve seat is connected with the first valve seat and the third valve seat to form a first sealing groove and a second sealing groove. The outer side of the first plastic sealing ring 202 and the second plastic sealing ring 203 is provided with a rubber sealing ring 205 and 206. The outer periphery of the lower end of the valve core is matched and sealed with the first plastic sealing ring or the second plastic sealing ring, the friction is small, the wear is small, the sealing performance is good, and the rubber sealing ring on the outer side ensures the sealing on the outer side. Similarly, the first valve seat is connected with the connecting seat to form a third sealing groove 308, and a plastic sealing ring 30 is arranged. The side surface of the valve seat body on the upper and lower sides of the annular accommodation groove 302 and 303 is provided with a sealing gasket 27 and rubber O-shaped sealing rings 28 and 29 for sealing the valve seat body and the first main valve hole and the first main valve hole. Except the coil, the valve seat, the execution assembly and the driving mechanism form an integral whole, which is fixedly inserted into the first main valve hole and the second main valve hole through the connecting seat, and the coil is directly fixed on the end surface of the valve body through a screw.

[0033] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied in various ways for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A four-way valve characterized by The valve body is provided with a vertical first main valve hole and a vertical second main valve hole, a third interface communicating with the first main valve hole is arranged on the side surface of the valve body, a fourth interface communicating with the second main valve hole is also arranged on the side surface of the valve body, the first main valve hole communicates with the second main valve hole through a first channel, the first interface communicates with the first channel, a second channel communicating with the first main valve hole and the second main valve hole is arranged at the bottom of the valve body, and the second channel communicates with the second interface; the first valve assembly and the second valve assembly comprise a valve seat, an execution assembly arranged in the valve seat, and a driving mechanism arranged on the execution assembly and used for driving the execution assembly, the valve seat comprises a hollow valve seat body arranged in the first main valve hole and the second main valve hole, the outer circumferential surface of the valve seat body is provided with two annular accommodation grooves, the annular accommodation grooves are distributed upwards and downwards along the axis of the valve seat body, the side surface of the valve seat body is provided with a first valve hole and a second valve hole penetrating through the valve seat body, the first valve hole and the second valve hole are respectively located in the two annular accommodation grooves, the first channel communicates with the positions of the first main valve hole and the second main valve hole corresponding to the uppermost annular accommodation groove, the third interface communicates with the position of the first main valve hole corresponding to the lowermost annular accommodation groove, the fourth interface communicates with the position of the second main valve hole corresponding to the lowermost annular accommodation groove, and the side surface of the valve seat body is attached to the inner walls of the first main valve hole and the second main valve hole; the driving mechanism comprises a sleeve, a rotor arranged in the sleeve, a coil arranged outside the sleeve and used for driving the rotor to rotate, a screw rod fixedly connected with the rotor, and a nut matched with the screw rod and drivingly connected with the execution assembly, the execution assembly comprises a valve core, the nut is drivingly connected with the valve core, and the valve core only moves in the vertical direction; a second sealing groove is arranged in the valve seat body at the connection position of the second channel and the first main valve hole and the second main valve hole, a second plastic sealing ring is arranged in the second sealing groove, a first sealing groove is arranged in the valve seat body between the two annular accommodation grooves, a first plastic sealing ring is arranged in the first sealing groove, when the valve core is in a lower position state, the lower end of the valve core is sealingly matched with the second plastic sealing ring, and the second plastic sealing ring seals the communication position of the first main valve hole and the second main valve hole and the second channel; when the valve core is in an upper position state, the lower end of the valve core is sealingly matched with the first plastic sealing ring, and the first plastic sealing ring seals the inner cavity of the valve seat body between the first valve hole and the second valve hole.

2. The four-way valve according to claim 1, characterized in that The positions of the valve cores in the first main valve hole and the second main valve hole are opposite to each other during work.

3. The four-way valve according to claim 2, characterized in that When the position of the valve core in the first main valve hole is in a lower position state, the position of the valve core in the second main valve hole is in an upper position state.

4. The four-way valve of claim 1, wherein The first channel and the second channel are parallel to each other, and the axes of the first channel and the second channel are perpendicular to the axes of the first main valve hole and the second main valve hole.

5. The four-way valve of claim 1, wherein The third interface and the fourth interface are located on the first side surface of the same side of the valve body.

6. The four-way valve according to claim 5, characterized in that The first interface and the second interface are located on a second side of the valve body, and the first side and the second side are oppositely arranged.

7. The four-way valve of claim 5, wherein The first channel and the second channel are parallel to the first side in terms of an axis.

8. The four-way valve according to claim 7, characterized in that The first channel and the second channel are closed by a plug.

9. The four-way valve of claim 1, wherein The valve seat body comprises a connecting seat, a first valve seat with a side wall, a second valve seat with a side wall, and a third valve seat with a side wall, which are sequentially fixedly connected; the second valve seat is connected with the first valve seat and the third valve seat to form a first sealing groove and a second sealing groove.

10. The four-way valve according to claim 9, characterized in that A rubber sealing ring is arranged outside the first plastic sealing ring or the second plastic sealing ring.

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