Four-way reversing valve and main valve thereof

Abstract

The invention discloses a four-way reversing valve and a main valve thereof. The main valve comprises a valve body block and a valve seat block. The valve body block comprises a valve body part, a first block part and a first connecting part which are integrated, the valve body part is provided with a valve cavity, and the first block part is provided with a channel D communicated with the valve cavity; the valve seat block comprises a seat main body and a second connecting part which are integrated; the seat main body is provided with a channel E, a channel S and a channel C; the first connecting part and the second connecting part are detachably connected, part of the seat body extends into the valve cavity through the butt joint opening, and the E channel, the S channel and the C channel all communicate with the valve cavity. The main valve is assembled in a detachable mode, so that the assembling process is relatively simplified, and the number of parts is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid control, in particular to a four-way reversing valve and a main valve thereof. BACKGROUND

[0002] The four-way reversing valve is usually applied in a system such as a heat pump air conditioner, a water heater or an air conditioning system of an electric vehicle, to realize switching of a refrigerant flow channel in the system, so as to realize refrigeration, heating and other functions of the whole system.

[0003] The main valve of the four-way reversing valve is provided with a first connecting frame, and the pilot valve is provided with a second connecting frame, and the main valve and the pilot valve are fixedly assembled together through welding of the first connecting frame and the second connecting frame.

[0004] The valve body assembly of the main valve includes a valve body, a valve seat, a first connecting block, a second connecting block and the aforementioned first connecting frame, etc., the valve seat is assembled with the valve body, the valve seat has an E interface, an S interface and a C interface which are communicated with a valve cavity of the valve body, the first connecting block has a D connecting pipe interface and is assembled with the valve body, and the second connecting block has an E connecting pipe interface, an S connecting pipe interface and a C connecting pipe interface and is assembled with the valve seat; the aforementioned components of the valve body assembly are generally pre-assembled by interference press fitting or spot welding, and then fixedly welded by furnace welding, the assembly process is complicated, and in the welding process, there is a problem that soldering material climbs to the surface of the components, resulting in product failure, rework or even scrap.

[0005] Therefore, how to improve the structure of the four-way reversing valve to at least partially improve or solve the aforementioned defects is a technical problem urgently needed to be solved by those skilled in the art. SUMMARY

[0006] The purpose of the present application is to provide a four-way reversing valve and a main valve thereof, which is relatively simplified in assembly process and reduces the number of components through structural optimization and detachable assembly.

[0007] To solve the aforementioned technical problems, the present application provides a main valve of a four-way reversing valve, which comprises a valve body block and a valve seat block.

[0008] The valve body block comprises an integrated valve body part, a first block part and a first connecting part, the valve body part has a valve cavity, and the first block part has a D channel communicated with the valve cavity;

[0009] The valve seat block comprises an integrated seat main body and a second connecting part, the seat main body has an E channel, an S channel and a C channel;

[0010] The first connecting part and the second connecting part are detachably connected, part of the seat main body extends into the valve cavity, and the E channel, the S channel and the C channel are all communicated with the valve cavity.

[0011] The application also provides a four-way reversing valve, comprising a main valve and a pilot valve, wherein the main valve is the main valve described in any one of the preceding aspects; and the pilot valve is detachably mounted on the valve body block.

[0012] The main valve of the four-way reversing valve provided by the application has the valve body assembly comprising the integrally-structured valve body block and the integrally-structured valve seat block, the valve body block is integrated with the valve body part, the first block part having the D channel and the first connecting part, and the valve seat block is integrated with the seat main body having the E channel, the S channel and the C channel and the second connecting part; the valve body block and the valve seat block are assembled through detachable connection of the first connecting part and the second connecting part; the valve body assembly structure of the main valve reduces the number of parts and simplifies the assembly process, which is conducive to improving the assembly efficiency of the main valve; meanwhile, the main parts of the valve body assembly of the main valve are assembled in a detachable manner, the related parts have the possibility of recycling, which is conducive to saving costs and avoiding the problem of rework or even scrapping caused by the possibility of solder climbing to the surface of the parts during the welding process. The four-way reversing valve provided by the application has the main valve with the foregoing structure and has the same beneficial effects, and the main valve and the pilot valve are connected in a detachable manner, so that the main valve and the pilot valve have the recyclability and are also conducive to saving costs. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure of the four-way reversing valve provided in the first embodiment of the application is shown in the figure;

[0014] Figure 2 The structure of the main valve of the four-way reversing valve provided in the first embodiment of the application is shown in the figure; Figure 1

[0015] Figure 3 The cross-sectional view of the valve body assembly shown in the figure is shown in the figure; Figure 2

[0016] Figure 4 The structure of the valve body block shown in the figure in one perspective view is shown in the figure; Figure 2

[0017] The structure of the valve body block shown in the figure in another perspective view is shown in the figure; Figure 5 Figure 2

[0018] The bottom view of the valve body block shown in the figure is shown in the figure; Figure 6 Figure 2 The right view of the valve body block shown in the figure is shown in the figure;

[0019] Figure 7 Figure 2 The cross-sectional view of the valve body block shown in the figure is shown in the figure;

[0020] Figure 8 The cross-sectional view of the valve body block shown in the figure is shown in the figure; Figure 2

[0021] ​​​​​​Figure 9 for Figure 8 A partial enlarged view of the middle J3 area;

[0022] Figure 10 for Figure 2 An isometric view of the valve seat block shown in ;

[0023] Figure 11 for Figure 2 A front view of the valve seat block shown in ;

[0024] Figure 12 for Figure 11 A top view of the valve seat block shown;

[0025] Figure 13 for Figure 11 Left side view of the seat block shown;

[0026] Figure 14 for Figure 3 A partial enlarged view of the middle J4 area;

[0027] Figure 15 This is a schematic structural diagram of an end cover of a main valve in one embodiment;

[0028] Figure 16 for Figure 3 A partial enlarged view of the middle J5 area;

[0029] Figure 17 for Figure 1 Schematic diagram of the structure of the pilot valve;

[0030] Figure 18 for Figure 1 A partial enlarged view of the middle J1 area;

[0031] Figure 19 for Figure 1 A partial enlarged view of the middle J2 area;

[0032] Figure 20 for Figure 19 Cross-sectional view of the middle bushing connection part;

[0033] Figure 21 for Figure 17 A schematic diagram of the structure of the bushing shown in FIG;

[0034] Figure 22 for Figure 19 The structural diagram of the pressing plate shown in FIG;

[0035] Figure 23 This is a structural diagram of the valve body block in the second embodiment;

[0036] Figure 24 Schematic diagram of the structure of the valve seat block in the second embodiment;

[0037] Figure 25 is a bottom view of the valve body block in the third embodiment;

[0038] Figure 26 is a structural schematic view of the valve seat block in the third embodiment;

[0039] Figure 27 is a bottom view of the valve body block in the fourth embodiment;

[0040] Figure 28 is a structural schematic view of the valve seat block in the fourth embodiment;

[0041] Figure 29 is a structural schematic view of the valve body block and the valve seat block assembled in the fifth embodiment;

[0042] Figure 30 is a bottom view of the valve body block in the sixth embodiment; Figure 29

[0043] Figure 31 is a structural schematic view of the valve seat block in the sixth embodiment; Figure 29

[0044] is a structural schematic view of the valve body block in the seventh embodiment; Figure 32

[0045] is a structural schematic view of the valve body block in the eighth embodiment; Figure 33

[0046] Figure 34 is a structural schematic view of the valve body block in the ninth embodiment;

[0047] Figure 35 is a sectional schematic view in the direction of I-I in the ninth embodiment; Figure 34

[0048] is a structural schematic view of the valve body block and the end cap in the tenth embodiment; Figure 36

[0049] is a structural schematic view of the end cap in the tenth embodiment; Figure 37 Figure 36 is a structural schematic view of the valve body block and the end cap in the eleventh embodiment;

[0050] Figure 38 is a structural schematic view of the end cap in the eleventh embodiment.

[0051] Figure 39 BRIEF DESCRIPTION OF THE DRAWINGS Figure 38 EXPLANATION OF REFERENCE NUMERALS

[0052] main valve 10, pilot valve 20;

[0053]

[0054] ​​​​Valve body block 11, valve body part 111, valve cavity 1111, butt joint 1112, flared section 1113, first step part 11131, internal thread section 11132, protrusion block part 1114, first block part 112, D channel 1121, first connecting part 113, first flange plate 113A, first connecting plate 113B, first mounting hole 1131, first sealing structure 114, support part 115, first mounting part 1151, second mounting part 1152, limiting block 116;

[0055] Valve seat block 12, seat main body 120, E channel 1201, S channel 1202, C channel 1203, valve seat part 121, second block part 122, second connecting part 123, second flange plate 123A, second connecting plate 123B, second mounting hole 1231, second sealing structure 124;

[0056] End cover 13, second step part 131, external thread part 132, limiting step part 133, sealing element 141, sealing ring 142, sealing gasket 143, bolt 151, nut 152, d capillary connecting part 16d, e capillary connecting part 16e, s capillary connecting part 16s, c capillary connecting part 16c, bushing hole 161, small hole part 1611, large hole part 1612, threaded hole 162, pressing plate 17, open slot 171, connecting hole 172;

[0057] Pilot valve body 21, connecting frame 22, mounting plate 221, d capillary 23d, e capillary 23e, s capillary 23s, c capillary 23c, bushing 24, thin sleeve part 241, thick sleeve part 242. DETAILED DESCRIPTION

[0058] For the convenience of understanding and description, the following will be described in combination with the four-way reversing valve and its main valve. The four-way reversing valve provided by the embodiments of the present application can be used in household scenarios (for example, household water heaters, household air conditioning systems, etc.), and can also be used in vehicle air conditioning system scenarios, etc.

[0059] In order to enable personnel in the technical field to better understand the present application scheme, the following will be further described in combination with the drawings and specific embodiments.

[0060] Please refer to Figure 1 , Figure 1 The structure schematic diagram of the four-way reversing valve in the first embodiment provided by the present application is shown.

[0061] The four-way reversing valve comprises a main valve 10 and a pilot valve 20, the main valve 10 is switched by the pilot valve 20 to change the pressure difference, the pilot valve 20 is driven by an electromagnetic driving core to move the pilot valve bowl, and the flow channel of the pilot valve 20 is switched by a reset spring to change the pressure difference at both ends of the main valve 10. The pilot valve 20 is generally installed on the main valve 10 to facilitate the communication of the capillary tube of the pilot valve 20 with the relevant chambers of the main valve 10.

[0062] Specifically, the main valve 10 has a D connection pipe (high pressure area) connected with the exhaust port of the compressor, an S connection pipe (low pressure area) connectable with the suction port of the compressor, an E connection pipe connectable with the heat exchanger, and a C connection pipe; in a general household scenario, the S connection pipe remains connected with the suction port of the compressor, the E connection pipe can be connected with the indoor heat exchanger, and the C connection pipe can be connected with the outdoor heat exchanger; in a vehicle scenario, the relevant connection pipes can also be connected with other components based on different requirements, and then switched by the reversing valve.

[0063] Specifically, the pilot valve 20 is connected with a d capillary tube 23d, an e capillary tube 23e, an s capillary tube 23s and a c capillary tube 23c; the d capillary tube 23d is connected with the D connection pipe of the main valve 10, the e capillary tube 23e is in communication with the left chamber of the main valve 10, the s capillary tube 23s is in communication with the S connection pipe of the main valve 10, and the c capillary tube 23c is in communication with the right chamber of the main valve 10; here, the left chamber and the right chamber refer to the two sides in the axial direction of the main valve 10, the slider inside the main valve 10 can move in the axial direction of the main valve 10, the slider has a slider chamber, and the aforementioned movement of the slider can switch the conduction state between the D connection pipe, the E connection pipe, the S connection pipe and the C connection pipe to change the flow direction of the refrigerant.

[0064] In the embodiment, the structure of the valve body assembly of the main valve 10, the installation structure of the main valve 10 and the pilot valve 20, and the installation structure of the capillary tube are improved, which will be described one by one.

[0065] Please refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 the structure diagram of the valve body assembly of the main valve, Figure 3 for Figure 2 the cross-sectional view of the valve body assembly shown in the figure.

[0066] In the embodiment, the valve body assembly of the main valve 10 comprises a valve body block 11 and a valve seat block 12.

[0067] The valve body block 11 comprises an integrated valve body part 111, a first block part 112 and a first connecting part 113, i.e. the valve body part 111, the first block part 112 and the first connecting part 113 are integrally formed. The valve body part 111 has a valve cavity 1111. The first block part 112 has a D channel 1121 which is in communication with the valve cavity 1111 and is used to connect with the aforementioned D connector.

[0068] The valve seat block 12 comprises an integrated seat main body 120 and a second connecting part 123, i.e. the seat main body 120 and the second connecting part 123 are integrally formed. The seat main body 120 has an E channel 1201, an S channel 1202 and a C channel 1203 which are used to connect with the aforementioned E connector, S connector and C connector respectively. At least part of the seat main body 120 is inserted into the valve body part 111, i.e. part of the seat main body 120 is located in the valve cavity 1111, so that the E channel 1201, the S channel 1202 and the C channel 1203 are all in communication with the valve cavity 1111.

[0069] Specifically, the E channel 1201 of the seat main body 120 has one channel port located in the valve cavity 1111 and one channel port located outside the valve cavity 1111, and the channel port located outside the valve cavity 1111 of the E channel 1201 is convenient for connecting with the E connector. The S channel 1202 and the C channel 1203 of the seat main body 120 are similar, and have channel ports located in the valve cavity 1111 and channel ports located outside the valve cavity 1111 which are convenient for connecting with the connectors.

[0070] The first connecting part 113 of the valve body block 11 and the second connecting part 123 of the valve seat block 12 are detachably connected.

[0071] In specific implementations, the first connecting part 113 and the second connecting part 123 can be detachably connected through fasteners. Exemplarily, the fasteners can be screws, and the fasteners can also be assemblies constituted by bolts and nuts, etc. The first connecting part 113 and the second connecting part 123 can also be detachably connected through other ways.

[0072] After the above scheme, the valve body block 11 is integrated with the valve body part 111 and the first block part 112 with the D channel 1121, the seat main body 120 of the valve seat block 12 is formed with the E channel 1201, the S channel 1202 and the C channel 1203, and part of the seat main body 120 can extend into the valve cavity 1111, so that the number of components of the valve body assembly of the main valve 10 is reduced, and the assembly steps are correspondingly simplified, at the same time, the valve body block 11 and the valve seat block 12 are connected in a detachable manner, and the corresponding connecting parts are integrally arranged on the valve body block 11 and the valve seat block 12 respectively, compared with the existing welding assembly method, the components have the possibility of recycling, and the problem of rework or even scrapping caused by the possibility of solder climbing to the surface of the components in the welding process is avoided.

[0073] Please refer to Figures 4 to 13 , wherein Figures 4 to 9 The structure diagram of the valve body block is shown in the figure, Figures 10 to 13 The structure diagram of the valve seat block is shown in the figure.

[0074] In this embodiment, the valve body part 111 of the valve body block 11 has a butt joint surface 1112 communicating with the valve cavity 1111, and part of the seat main body 120 of the valve seat block 12 extends into the valve cavity 1111 through the butt joint surface 1112. The seat main body 120 of the valve seat block 12 includes a valve seat part 121 and a second block part 122, wherein the valve seat part 121 extends into the valve cavity 1111 through the butt joint surface 1112.

[0075] The valve body block 11 is provided with a first sealing structure 114, and the valve seat block 12 is provided with a second sealing structure 124, wherein the first sealing structure 114 is a ring structure around the butt joint surface 1112, and the second sealing structure 124 is a ring structure around the valve seat part 121. After the valve seat part 121 of the valve seat block 12 is inserted into the valve cavity 1111 of the valve body part 111 through the butt joint surface 1112, the first sealing structure 114 and the second sealing structure 124 can be sealed and matched to seal the insertion part of the valve body block 11 and the valve seat block 12, so as to avoid leakage of refrigerant and other causes leading to failure of the four-way reversing valve.

[0076] As shown in the figure, Figures 5 to 9 The first sealing structure 114 of the valve body block 11 is a ring-shaped protrusion around the butt joint surface 1112, as shown in the figures, Figure 10 and Figure 12 The second sealing structure 124 of the valve seat block 12 is a ring-shaped groove of the ring-shaped valve seat part 121. After the valve seat part 121 of the valve seat block 12 is inserted into the valve body block 11, the ring-shaped protrusion is inserted into the ring-shaped groove to realize sealing and matching.

[0077] Please refer to Figure 14 , Figure 14 It is shown that Figure 3A local enlarged view of the J4 part. In one implementation, a ring-shaped sealing member 141 can be placed in the ring-shaped groove, and the ring-shaped protrusion of the valve body block 11 is inserted into the ring-shaped groove and presses against the sealing member 141 to improve the sealing effect between the valve body block 11 and the valve seat block 12. In addition, the sealing member 141 can avoid the problem that the ring-shaped protrusion and the ring-shaped groove cannot be well sealed due to machining errors.

[0078] The sealing member 141 can be made of a material with elasticity, such as a rubber sealing member, to ensure the sealing effect.

[0079] In this embodiment, the first connecting portion 113 is arranged on the side where the valve body block 11 is connected to the valve seat block 12, and the second connecting portion 123 is arranged on the side where the valve seat block 12 is connected to the valve body block 11, which facilitates the assembly of the two blocks and also helps to ensure the assembly effect.

[0080] Specifically, as shown in Figures 4 to 6 , the first connecting portion 113 is a first flange plate 113A arranged around the periphery of the first sealing structure 114; as shown in Figure 10 and Figure 12 , the second connecting portion 123 is a second flange plate 123A arranged around the periphery of the second sealing structure 124. The first flange plate 113A is provided with a plurality of first mounting holes 1131, and the second flange plate 123A is provided with a plurality of second mounting holes 1231, the positions of the first mounting holes 1131 and the second mounting holes 1231 correspond. After the valve seat portion 121 of the valve seat block 12 is inserted into the valve body portion 111 of the valve body block 11, the valve body block 11 and the valve seat block 12 can be fixed by fastening the first mounting holes 1131 of the first flange plate 113A and the second mounting holes 1231 of the second flange plate 123 through fasteners. During the assembly of the fasteners, the tightening force of the fasteners can also ensure the compression of the ring-shaped protrusion against the sealing member 141, thereby ensuring the sealing effect.

[0081] For example, the fasteners can be a combination of bolts 151 and nuts 152. After the bolts 151 pass through the first mounting holes 1131 and the second mounting holes 1231, they are fixed by tightening the nuts 152.

[0082] For reference Figure 15 and Figure 16 , Figure 15 , a structure diagram of the end cover of the main valve in one embodiment, Figure 16 is Figure 3 a local enlarged view of the J5 part.

[0083] In order to facilitate the assembly of the slider and connecting rod piston assembly (not shown in the figure) in the valve cavity 1111 of the valve body part 111, the two ends of the valve body part 111 are open in the axial direction of the valve cavity 1111. After assembling the slider and connecting rod piston assembly, the valve cavity 1111 needs to be sealed. Therefore, in the present embodiment, the valve body assembly of the main valve 10 further comprises two end covers 13 for sealing the two open ends of the valve body part 111.

[0084] In the present embodiment, the end cover 13 and the valve body part 111 are connected in a detachable manner, so that the end cover 13 and the valve body part 111 are recyclable.

[0085] In combination Figure 4 And Figure 6 It is understood that the two ends of the valve body part 111 have flared sections 1113, which form first stepped portions 11131 with outwardly facing steps inside, and the flared sections 1113 have internally threaded portions 11132 located outside the first stepped portions 11131. Here, the outside refers to the side away from the valve cavity 1111, and correspondingly, the side close to the valve cavity 1111 is the inside, and the following refers to the inside and outside in the same way.

[0086] The end cover 13 has an externally threaded portion 132, and the side of the end cover 13 facing the valve body part 111 is provided with a second stepped portion 131 with an inwardly facing step. The externally threaded portion 132 of the end cover 13 is threadedly engaged with the internally threaded portion 11132 of the valve body part 111 to achieve detachable connection of the end cover 13 and the valve body part 111; wherein a sealing ring 142 is provided between the stepped surface of the first stepped portion 11131 and the stepped surface of the second stepped portion 131 to ensure the sealing of the connection between the end cover 13 and the valve body part 111.

[0087] Figure 16 In the shown, the notch on the right side of the sealing ring 142 on the end cover 13 is a tool withdrawal groove when the end cover 13 is machined.

[0088] It should be noted that Figure 13 In the shown, only the assembled end cover 13 at the right open end of the valve body part 111 is shown, and in actual application, the flared section 1113 on the left side of the valve body part 111 and the end cover 13 cooperating therewith are the same as the right side, and will not be described again.

[0089] For reference Figure 17 And Figure 18 , Figure 17 For Figure 1 The structure diagram of the pilot valve in the shown, Figure 18 For Figure 1 The local enlarged view of J1 part in the shown.

[0090] In this embodiment, the main valve 10 and the pilot valve 20 of the four-way directional control valve are detachably mounted. The bracket portion 115 is provided on the main valve 10, and the connecting bracket 22 is provided on the pilot valve 20. The connecting bracket 22 and the bracket portion 115 are detachably connected by fasteners, so that the pilot valve 20 is detachably mounted on the main valve 10. After such arrangement, the recyclability of the main valve 10 or the pilot valve 20 is provided.

[0091] Because the valve block portion 12 of the main valve 10 needs to be connected with each pipe, the bracket portion 115 is generally arranged on the valve body block 11 of the main valve 10. Specifically, the bracket portion 115 is arranged on the valve body portion 111 of the valve body block 11. The bracket portion 115 and the valve body portion 111 are in an integral structure, so that the assembly step between the bracket portion 115 and the valve body portion 111 can be omitted, and the structural strength of the bracket portion 115 is also improved.

[0092] In combination Figure 4 , the bracket portion 115 includes a first mounting portion 1151 and a second mounting portion 1152 arranged oppositely. In the illustrated example, the first mounting portion 1151 and the second mounting portion 1152 are two oppositely independent plate portions.

[0093] The connecting bracket 22 is fixedly arranged on the pilot valve body 21 of the pilot valve 20. The connecting bracket 22 can be detachably connected with the pilot valve body 21, or can be integrally formed with the pilot valve body 21. When the connecting bracket 22 is detachably connected with the pilot valve body 21, the relative position of the connecting bracket 22 on the pilot valve body 21 can be adjusted. If there is a machining error between the connecting bracket 22 and the bracket portion 115, the position-adjustable connecting bracket 22 can compensate for the machining error and ensure the mounting reliability.

[0094] The connecting bracket 22 includes two mounting plates 221 arranged in parallel. The two mounting plates 221 of the connecting bracket 22 are detachably connected with the first mounting portion 1151 and the second mounting portion 1152 of the bracket portion 115 by fasteners, respectively. Figures 19 to 22 As shown in the figure, the bracket portion 115 is located between the two mounting plates 221 of the connecting bracket 22. The first mounting portion 1151 and the corresponding mounting plate 221 are provided with position-corresponding mounting holes. The fasteners pass through the two mounting holes to fasten the first mounting portion 1151 and the mounting plate 221. The second mounting portion 1152 and the corresponding mounting plate 221 are provided with position-corresponding mounting holes. The fasteners pass through the two mounting holes to fasten the second mounting portion 1152 and the mounting plate 221. The fasteners can be selected from screws, or a combination structure of bolts and nuts, etc.

[0095] In this embodiment, the connection of each capillary tube of the pilot valve 20 to the main valve 10 is also detachable, and the detachable assembly of the pilot valve 20 and the main valve 10 makes the main valve 10 and the pilot valve 20 recyclable repeatedly, without damaging the main valve 10 or the capillary tube due to the disassembly of the capillary tube and the main valve 10, and avoiding the adverse problems such as the disconnection of the capillary tube and the main valve 10 caused by the welding method.

[0096] For a better understanding of the present application, reference will be made to the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings, in which: Figure 19 Figure 1 For a better understanding of the present application, reference will be made to the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings, in which: Figure 20 is a local enlarged view of the J2 part in FIG. 8, Figure 19 is a sectional view of the sleeve connection part in FIG. 8, Figure 21 is a sectional view of the sleeve connection part in FIG. 8, Figure 17 is a structural schematic view of the sleeve shown in FIG. 8, Figure 22 is a structural schematic view of the sleeve shown in FIG. 8. In this embodiment, a sleeve 24 is fixedly connected to the end (the end connected to the main valve 10) of each of the d capillary tube 23d, the e capillary tube 23e, the s capillary tube 23s, and the c capillary tube 23c connected to the pilot valve 20. Figure 19 Figure 21 As shown in FIG. 8, the sleeve 24 includes a thin sleeve part 241 and a thick sleeve part 242, and when the sleeve 24 is installed at the end of the capillary tube, the thin sleeve part 241 is closer to the side where the pilot valve 20 is located relative to the thick sleeve part 242.

[0097] As shown in FIG. 8, the sleeve 24 includes a thin sleeve part 241 and a thick sleeve part 242, and when the sleeve 24 is installed at the end of the capillary tube, the thin sleeve part 241 is closer to the side where the pilot valve 20 is located relative to the thick sleeve part 242. Figure 1 In the corresponding positions of the main valve 10, there are provided a d capillary tube connection part 16d, an e capillary tube connection part 16e, an s capillary tube connection part 16s, and a c capillary tube connection part 16c. In combination with

[0098] and Figure 2 , in this embodiment, the d capillary tube connection part 16d is provided on the first block part 112 of the valve body block 11, the e capillary tube connection part 16e and the c capillary tube connection part 16 are respectively provided on the axial two end parts of the valve body part 111, and the s capillary tube connection part 16s is provided on the valve seat block 12. This position is related to the function of the capillary tube. The structure of each capillary tube connection part is consistent, which will be described uniformly below. Figures 5 to 7 In combination with

[0099] , Figure 10 , Figure 11 and Figure 19 , each capillary tube connection part includes a sleeve hole 161, which includes a small hole part 1611 and a large hole part 1612. The large hole part 1612 is located on the outside of the small hole part 1611, that is, the small hole part 1611 of the sleeve hole 161 is closer to the inside of the main valve 10 relative to the large hole part 1612, or the step surface formed at the connection of the small hole part 1611 and the large hole part 1612 faces the outside of the main valve 10.

[0100] ​​The gasket 143 is placed in the large hole portion 1612 of the bushing hole 161, the thick sleeve portion 242 of the bushing 24 fixed to the end of the capillary tube is inserted into the large hole portion 1612 of the bushing hole and presses against the gasket 143, and then the thick sleeve portion 242 of the bushing 24 is pressed against by the pressing plate 17 detachably connected to the main valve 10. In this way, after the bushing 24 is combined with the bushing hole 161, the relative fixation between the bushing 24 and the main valve 10 is achieved by the pressing plate 17, and the gasket 143 arranged between the bushing 24 and the bushing hole 161 can ensure the sealing performance at the connection position of the bushing 24, thereby avoiding leakage.

[0101] In specific implementations, the pressing plate 17 is detachably connected to the main valve 10 by means of fasteners or the like. Each capillary tube connecting portion further includes threaded holes 162 on both sides of the bushing hole. The pressing plate 17 has an open slot 171 for avoiding the capillary tube combined with the bushing hole 161 and two connecting holes 172 corresponding to the two threaded holes 162. After the bushing 24 at the end of the capillary tube is combined with the bushing hole 161, the pressing plate 17 can be fastened to the main valve 10 by means of fasteners such as screws passing through the connecting holes 172 of the pressing plate 17 and the threaded holes 162 of the main valve 10, and at the same time, the thick sleeve portion 242 of the bushing 24 is pressed towards the main valve 10 by the pressing plate 17 to limit the relative position of the bushing 24 and the main valve 10.

[0102] It can be understood that the open slot 171 of the pressing plate 17 avoids the capillary tube while not affecting the pressing of the thick sleeve portion 242. For a better understanding, please refer to Figure 2 .

[0103] In specific implementations, the valve body portion 111 of the valve body block 11 of the main valve 10 is substantially tubular in structure, and the wall thickness thereof can be relatively thin. When the e capillary tube connecting portion 16e and the c capillary tube connecting portion 16c are arranged at both ends of the valve body portion 111, the bushing hole 161 with the large hole portion 1612 and the small hole portion 1611 cannot be machined due to the wall thickness. In this case, the valve body block 11 can be integrally formed with a protruding block portion 1114 at both ends of the valve body portion 111, as shown in Figure 4 , Figure 6 and Figure 1 , and the e capillary tube connecting portion 16e and the c capillary tube connecting portion 16c are arranged on the two protruding block portions 1114, respectively.

[0104] In specific implementations, at least one of the valve body block 11, the valve seat block 12 and the end cover 13 of the main valve 10 can be made of an aluminum alloy, which can reduce the weight of the valve and facilitate cost reduction. In other implementations, the components of the main valve 10 or the components of the pilot valve 20 can also be made of other materials.

[0105] The above description of Figures 2 to 22The detailed structure of the four-way reversing valve is introduced in detail, and the related structural parts in the Figure 1 are combined. Figure 23 In actual application, the four-way reversing valve can also have other transformed embodiments, which will be introduced in different parts below, and similar structures can be understood by referring to the foregoing, and will not be described in detail.

[0106] In some other embodiments, as shown in the second embodiment in Figure 24 and Figures 1 to 22 , the first sealing structure 114 provided on the valve body block 11 of the main valve 10 is in the form of a ring-shaped groove, and the second sealing structure 124 provided on the valve seat block 12 and matched with the first sealing structure 114 is in the form of a ring-shaped protrusion; when assembled, the ring-shaped sealing member 141 is placed in the first sealing structure 114 as a ring-shaped groove, and the second sealing structure 124 as a ring-shaped protrusion is inserted into the first sealing structure 114 and pressed against the sealing member 141. Compared with the embodiment shown in the foregoing Figures 1 to 22 , the specific structural forms of the first sealing structure 114 of the valve body block 11 and the second sealing structure 124 of the valve seat block 12 are reversely arranged.

[0107] In the first embodiment shown in the foregoing Figure 23 , and the second embodiment shown in Figure 24 and Figure 25 , the butt joint interface 1112 of the valve body block 11 is roughly in the shape of a rectangle, the first sealing structure 114 provided around the periphery of the butt joint interface 1112 is also roughly in the shape of a rectangle, and correspondingly, the valve seat part 121 of the valve seat block 12 is roughly in the matching cuboid structure, and the second sealing structure 124 provided around the periphery of the valve seat part 121 is also roughly in the shape of a rectangle. In other embodiments, the shapes of the first sealing structure 114 and the second sealing structure 124 can be other forms, and the structures of the associated butt joint interface 1112 and valve seat part 121 can also be adaptively adjusted. For example, in the third embodiment shown in Figure 26 and Figure 27 , the first sealing structure 114 and the second sealing structure 124 are both roughly in the shape of a racetrack, or in the shape of an oblong, and along the axis direction of the valve cavity 1111, the two ends of the valve seat part 121 are in the structure of a circular arc; for another example, in the fourth embodiment shown in Figure 28 and Figure 25 , the first sealing structure 114 and the second sealing structure 124 are both roughly in the shape of a hexagon, which is a narrow hexagon, and can be understood as Figure 26 and Figures 29 to 31The first and second sealing structures 114 and 124 exhibit a racetrack-shaped deformation. Along the axis of the valve cavity 1111, the ends of the first and second sealing structures 114 and 124 are generally trapezoidal in shape, while the middle portions are rectangular. In addition to the illustrated examples, the shapes of the first and second sealing structures 114 and 124, the shape of the docking port 1112, and the structure of the valve seat 121 may also have other structural forms, which will not be described in detail.

[0108] In the aforementioned embodiments, the first connection portion 113 of the valve body block 11 is a first flange 113A structure, and the second connection portion 123 of the valve seat block 12 is a matching second flange 123A structure. In other embodiments, the first connection portion 113 and the second connection portion 123 may also be in other structural forms, such as Figures 29 to 31 In the fifth embodiment shown, the first connecting portion 113 includes two first connecting plates 113B arranged along the axis of the valve cavity 1111 and extending radially perpendicular to the axis of the valve cavity 1111. The second connecting portion 123 includes two second connecting plates 123B, which correspond to the positions of the two first connecting plates 113B, respectively. The first connecting plates 113B and the second connecting plates 123B are detachably connected by fasteners. A first mounting hole 1131 is provided at each end of the first connecting plate 113B, and a matching second mounting hole 1231 is provided at each end of the second connecting plate 123B. The fasteners may also be a combination of bolts and nuts. The detachable connection structure of the valve body block 11 and the valve seat block 12 in the fifth embodiment can be achieved using fewer fasteners, thereby reducing the weight of the main valve 10.

[0109] In some embodiments, the detachable connection structure between the main valve 10 and the pilot valve 20 of the four-way reversing valve is further provided with a limiter. Specifically, a limiter is provided on both sides of the bracket portion 115 of the main valve 10 to limit the relative position of the connecting bracket 22 of the pilot valve 20 and the bracket portion 115. The provision of the limiter prevents the connecting bracket 22 from rotating relative to the bracket portion 115, thereby preventing the pilot valve 20 from moving relative to the main valve 10, thereby ensuring the reliability of the four-way reversing valve during operation.

[0110] like Figure 29In the fifth embodiment shown, the bracket part 115 of the main valve 10 is consistent with the structure of the first embodiment described above, and includes two plate parts arranged separately, which form the first mounting part 1151 and the second mounting part 1152 respectively. In the fifth embodiment, the limiting part includes four limiting blocks 116, one limiting block 116 is arranged on each side of the first mounting part 1151, and one limiting block 116 is also arranged on each side of the second mounting part 1152; the arrangement direction of the two limiting blocks 116 of the first mounting part 1151 is substantially perpendicular to the arrangement direction of the first mounting part 1151 and the second mounting part 1152, and the two limiting blocks 116 of the first mounting part 1151 each extend out of the first mounting part 1151 in a direction away from the second mounting part 1152, so that one mounting plate 221 of the connecting frame 22 is limited between the two limiting blocks 116 after being fastened with the first mounting part 1151, and cannot move. The two limiting blocks 116 of the second mounting part 1152 are also arranged similarly.

[0111] As shown in Figure 30 and Figures 29 to 31 specifically, the first mounting part 1151 and the two limiting blocks 116 matched therewith are connected as a whole, and the second mounting part 1152 and the two limiting blocks 116 matched therewith are also connected as a whole. The four limiting blocks of the limiting part are in a unitary structure with the valve body part 111.

[0112] The structure form of the bracket part 115 and the limiting part can also have other implementation manners in addition to Figure 32 the fifth embodiment shown.

[0113] For example Figure 29 in the sixth embodiment shown, the structure form of the bracket part 115 of the main valve 10 is consistent with the bracket part 115 shown in Figure 30 and Figure 33 The difference between the two is that the two limiting blocks 116 matched with the first mounting part 1151 are arranged independently with respect to the first mounting part 1151, and the two limiting blocks 116 matched with the second mounting part 1152 are also arranged independently with respect to the second mounting part 1152. Each limiting block 116 is in a unitary structure with the valve body part 111.

[0114] For another example Figure 34 in the seventh embodiment shown, the bracket part 115 of the main valve 10 is a bracket block structure, two end faces of the bracket block in the axial direction of the valve cavity 1111 form the first mounting part 1151 and the second mounting part 1152 respectively, and the limiting part includes four limiting blocks 116, the first mounting part 1151 is matched with two limiting blocks 116, and the second mounting part 1152 is also matched with two limiting blocks 116. The four limiting blocks 116 of the limiting part are connected with the bracket part 115 as a whole, and are in a unitary structure with the valve body part 111.

[0115] For another exampleFigure 35 and Figures 1 to 22 In the eighth embodiment shown, the bracket portion 115 of the main valve 10 is a bracket block structure. The bracket block forms a first mounting portion 1151 and a second mounting portion 1152 on two end surface portions in the axial direction of the valve cavity 1111, respectively. The limiting portion includes two limiting blocks 116 extending along the axial direction of the valve cavity 1111. The two limiting blocks 116 are located on either side of the bracket portion 115. In the axial direction of the valve cavity 1111, each limiting block 116 extends beyond both ends of the bracket portion 115. In this way, the effect of limiting the movement of the connecting frame 22 connected to the bracket portion 115 can still be achieved. The two limiting blocks 116 are integrally connected to the bracket portion 115 and form an integral structure with the valve body portion 111.

[0116] In the aforementioned Figure 29 In the first embodiment shown, the d capillary connection portion 16d on the main valve 10 for assembly with the d capillary 23d is provided on the first block 112 of the valve body block 11. The function of the d capillary 23d is to connect the high-pressure area in the valve cavity 1111 with the pilot valve cavity of the pilot valve 20. Therefore, the setting position of the d capillary connection portion 16d is not limited to the first block 112. It can be located in the high-pressure area in the valve cavity 1111 of the main valve 10. The high-pressure area in the valve cavity 1111 is the intermediate overlapping area between the two extreme positions of the connecting rod piston assembly in the valve cavity 1111. In the specific setting, the d capillary connection portion 16d can be provided on the valve body portion 111 of the valve body block 11, as shown in FIG. Figure 32 and 30 The fifth embodiment shown, or as Figure 33 、 Figure 34 as well as Figure 35 、 Figure 34 The embodiment shown.

[0117] by Figure 35 Take the example to illustrate, combined with Figures 1 to 22 To facilitate the processing of the bushing hole 161 of the capillary connection portion 16d, the corresponding setting of the valve body portion 111 can also be integrally formed with a protruding block portion 1114, and the capillary connection portion 16d is set on the protruding block portion 1114.

[0118] In the aforementioned Figure 36 In the first embodiment shown, the end cap 13 of the main valve 10 is sealed to the valve body 111 by means of threaded engagement and a sealing ring 142. In other embodiments, the end cap 13 and the valve body 111 may be fixed by welding.

[0119] For example Figure 37 and Figure 37In the ninth embodiment shown, the two end portions of the valve body part 111 of the valve body block 11 can not be provided with the flared sections 1113, and the two end portions of the valve body part 111 are of equal diameter section structure. The end cover 13 can be provided with a limiting stepped portion 133 with a stepped surface facing the valve body part 111. A portion of the end cover 13 is embedded in the end opening of the valve body part 111, and is fixed by laser welding or other welding method. At this time, the weld joint K1 formed by welding of the end cover 13 and the valve body part 111 is located at the peripheral surface of the valve body part 111. Figure 38 The structure of the end cover 13 shown can be processed from a bar material.

[0120] For example, the end cover 13 can be provided with a stepped surface facing the valve body part 111, and a portion of the end cover 13 is embedded in the end opening of the valve body part 111, and is fixed by laser welding or other welding method. At this time, the weld joint K1 formed by welding of the end cover 13 and the valve body part 111 is located at the peripheral surface of the valve body part 111. Figure 39 For example, the end cover 13 can be provided with a stepped surface facing the valve body part 111, and a portion of the end cover 13 is embedded in the end opening of the valve body part 111, and is fixed by laser welding or other welding method. At this time, the weld joint K1 formed by welding of the end cover 13 and the valve body part 111 is located at the peripheral surface of the valve body part 111. Figure 39 The structure of the end cover 13 shown can be processed from a bar material. ​ The structure of the end cover 13 shown can be processed from a bar material.

[0121] In actual application, the related structures in the above embodiments can be combined to form new embodiments without interference, and the related structure components can also have other forms of deformation.

[0122] The principles and implementation modes of the present application are described by using specific examples in the present text, and the above embodiment descriptions are only used to help understand the method and core idea of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. The main valve of the four-way reversing valve is characterized by: The main valve includes a valve body block and a valve seat block; The valve body block includes an integrated valve body portion, a first block portion, and a first connecting portion. The valve body portion has a valve cavity, and the first block portion has a D channel communicating with the valve cavity. The valve seat block includes an integrated seat body and a second connecting portion, wherein the seat body has an E channel, an S channel and a C channel; The first connecting portion and the second connecting portion are detachably connected, a portion of the seat body extends into the valve cavity, and the E channel, the S channel, and the C channel are all communicated with the valve cavity.

2. The main valve of the four-way reversing valve according to claim 1, characterized in that: The valve body has a docking port communicating with the valve cavity, the seat body includes a valve seat portion and a second block portion, and the valve seat portion extends into the valve cavity through the docking port; The valve body block is provided with a first sealing structure, and the valve seat block is provided in a second sealing structure. The first sealing structure is an annular structure surrounding the docking port, and the second sealing structure is an annular structure surrounding the valve seat portion. One of the first sealing structure and the second sealing structure is an annular groove, and the other is an annular protrusion, and the annular protrusion is inserted into the annular groove.

3. The main valve of the four-way reversing valve according to claim 2, characterized in that: An annular sealing member is provided in the annular groove, and the annular protrusion presses against the sealing member.

4. The main valve of the four-way reversing valve according to claim 2, characterized in that: The annular structures of the first sealing structure and the second sealing structure are rectangular, racetrack or hexagonal.

5. The main valve of the four-way reversing valve according to claim 2, characterized in that: The first connection portion is a first flange arranged around the periphery of the first sealing structure, and the second connection portion is a second flange arranged around the periphery of the second sealing structure. The first flange has a plurality of first mounting holes, and the second flange has a plurality of second mounting holes. Alternatively, the first connecting portion includes two first connecting plates, which are arranged along the axial direction of the valve cavity and extend radially perpendicular to the axial direction of the valve cavity; the second connecting portion includes two second connecting plates, which are respectively detachably connected to the two first connecting plates.

6. The main valve of the four-way reversing valve according to any one of claims 1 to 5, characterized in that: Along the axis of the valve cavity, both ends of the valve body are provided with flared sections, a first step portion with a step surface facing outward is formed inside the flared section, and the flared section has an internal thread portion, and the internal thread portion is located outside the first step portion; The main valve also includes two end covers; the end cover has an external threaded portion, and the side of the end cover facing the valve body is provided with a second step portion with the step surface facing inward; the end cover and the valve body are connected by threaded cooperation between the external threaded portion and the internal threaded portion, and a sealing ring is provided between the first step portion and the second step portion.

7. The main valve of the four-way reversing valve according to any one of claims 1 to 5, characterized in that: Along the axial direction of the valve cavity, the two ends of the valve body are open ends; the main valve also includes two end covers, which are respectively used to seal the two open ends, and the end covers are welded and fixed to the valve body.

8. Four-way reversing valve, including main valve and pilot valve, characterized in that: The main valve is the main valve according to any one of claims 1 to 7; and the pilot valve is detachably mounted on the valve body block.

9. The four-way reversing valve according to claim 8, characterized in that: A bracket portion is provided on the valve body portion, and the bracket portion and the valve body portion are an integral structure. The bracket portion includes a first mounting portion and a second mounting portion that are arranged opposite to each other; a connecting frame is fixedly provided on the pilot valve body of the pilot valve, and the connecting frame includes two parallelly arranged mounting plates, and the two mounting plates are respectively detachably connected to the first mounting portion and the second mounting portion by fasteners.

10. The four-way reversing valve according to claim 9, characterized in that: Limiting parts are provided on both sides of the bracket part, and the limiting parts are used to limit the relative positions of the connecting frame and the bracket part.

11. The four-way reversing valve according to any one of claims 8 to 10, characterized in that: The main valve has a capillary connection portion, which includes a bushing hole. The bushing hole includes a small hole portion and a large hole portion, and the large hole portion is located on the outside of the small hole portion; the pilot valve includes a capillary tube, and the end of the capillary tube is fixedly covered with a bushing. The bushing includes a thin sleeve portion and a thick sleeve portion, and the thin sleeve portion is closer to the pilot valve body of the pilot valve relative to the thick sleeve portion; the large hole portion is provided with a sealing gasket, and the thick sleeve portion is located in the large hole portion and presses against the sealing gasket; the four-way reversing valve also includes a pressure plate, which is detachably connected to the main valve and presses against the thick sleeve portion.

12. The four-way reversing valve according to claim 11, characterized in that: The capillary connecting part also includes threaded holes located on both sides of the bushing hole. The pressure plate has an open groove and two connecting holes. The open groove is used to avoid the capillary, and the connecting holes correspond to the positions of the threaded holes. The pressure plate is connected to the main valve by fasteners passing through the connecting holes and the threaded holes.

13. The four-way reversing valve according to claim 11, characterized in that: The main valve has four capillary connection parts, which are capillary connection part d, capillary connection part e, capillary connection part s and capillary connection part c respectively; Along the axial direction of the valve cavity, both ends of the valve body are integrally formed with protruding blocks, and the capillary tube connecting portion e and the capillary tube connecting portion c are respectively provided on the two protruding blocks; The d capillary tube connection portion is provided on the first block portion or on the valve body portion, and the s capillary tube connection portion is provided on a portion of the seat body located outside the valve cavity.

14. The four-way reversing valve according to any one of claims 8 to 10, characterized in that: At least one of the valve body block, the valve seat block and the end cover of the main valve is an aluminum alloy part.

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