CN212959976U

CN212959976U - Electronic expansion valve

Info

Publication number: CN212959976U
Application number: CN202021677399.4U
Authority: CN
Inventors: 罗意明; 张俊伟
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-13
Anticipated expiration: 2030-08-12

Abstract

The utility model provides an electronic expansion valve, this electronic expansion valve includes: the first shell is provided with a valve cavity, and the outlet end of the first shell is provided with a valve port and a circulation channel which are mutually independent; the valve core assembly is movably arranged in the valve cavity and is used for communicating, adjusting or isolating the valve cavity and the valve port; the one-way plugging piece is movably arranged in the valve cavity and is provided with an opening position and a plugging position relative to the first shell, when the one-way plugging piece is located at the opening position, the flow passage is communicated with the valve cavity, and when the one-way plugging piece is located at the plugging position, the flow passage is separated from the valve cavity. Through the technical scheme provided by the application, the problem of complex structure in the prior art can be solved.

Description

Electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve technical field particularly, relates to an electronic expansion valve.

Background

Generally, an air conditioning system is provided with an electronic expansion valve and a check valve for controlling a flow direction of a refrigerant during cooling and heating of the air conditioning system. In the prior art, the electronic expansion valve and the one-way valve are two parts which are independently arranged, and the one-way valve is connected with the electronic expansion valve through an external pipeline, so that the problem of complex structure exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the problem that the structure is complicated among the prior art.

The utility model provides an electronic expansion valve, electronic expansion valve includes: the first shell is provided with a valve cavity, and the outlet end of the first shell is provided with a valve port and a circulation channel which are mutually independent; the valve core assembly is movably arranged in the valve cavity and is used for communicating, adjusting or isolating the valve cavity and the valve port; the one-way plugging piece is movably arranged in the valve cavity and is provided with an opening position and a plugging position relative to the first shell, when the one-way plugging piece is located at the opening position, the flow passage is communicated with the valve cavity, and when the one-way plugging piece is located at the plugging position, the flow passage is separated from the valve cavity.

Furthermore, the electronic expansion valve further comprises a guide sleeve, the guide sleeve is arranged in the valve cavity, the valve core assembly is arranged in the guide sleeve in a penetrating mode, the valve port is located on the inner side of the guide sleeve, the circulation channel is located on the outer side of the guide sleeve, and the one-way plugging piece is movably sleeved on the outer wall of the guide sleeve.

Furthermore, the one-way plugging piece is provided with at least one first flow through hole, the outlet end of the first shell is provided with at least one flow channel, and the first flow through hole and the flow channel are arranged in a staggered mode.

Furthermore, the electronic expansion valve further comprises a rotation stopping structure, the rotation stopping structure is arranged between the one-way plugging piece and the first shell and/or the guide sleeve, and the rotation stopping structure is used for limiting the rotation of the one-way plugging piece relative to the first shell.

Further, one-way shutoff piece has first mounting hole, and the uide bushing is worn to establish in first mounting hole including interconnect's first section and second section, and first mounting hole is the non-round hole, and the overall dimension of second section suits with the pass of first mounting hole in order to form the structure of splining.

Further, at least part of the projection of the outer wall of the first section in the axial direction is located outside the outer wall of the second section.

Furthermore, a plurality of second flow through holes are formed in the outlet end of the first shell, the second flow through holes are arranged on the periphery of the valve port at intervals along the circumferential direction of the first shell, and the second flow through holes form a circulation channel.

Further, the first shell comprises a valve body and a sleeve which are connected with each other, a valve seat is integrally formed on the valve body, a valve port is arranged on the valve seat, and a circulation channel is arranged on the valve body.

Further, the electronic expansion valve further comprises a sealing member disposed on a side of the one-way blocking member facing the outlet end of the first housing.

Furthermore, an inlet is formed in the side wall of the first shell and communicated with the valve cavity, the electronic expansion valve further comprises a diverter module, the diverter module is connected with the outlet end of the first shell, and the valve port and the circulation channel are communicated with the diverter module.

Further, the electronic expansion valve comprises an expansion valve module and a flow divider module, wherein the expansion valve module comprises a first shell and a valve core assembly, the flow divider module comprises a second shell, the second shell is connected with the first shell, the second shell is provided with a flow dividing part, the flow dividing part is provided with a flow dividing inlet and a plurality of flow dividing outlets, and the flow dividing inlet is communicated with the valve port.

Further, the first shell and the second shell are connected through threads or fixed through welding.

Furthermore, the second housing is provided with a second mounting hole, the shunt inlet is communicated with the second mounting hole, the first housing is provided with a connecting part, the valve port is arranged on the connecting part, an inner thread is arranged on the inner wall of the second mounting hole, an outer thread is arranged on the outer wall of the connecting part, and the inner thread is matched with the outer thread.

Further, the electronic expansion valve further comprises a sealing structure arranged between the connecting part and the second mounting hole.

Further, the second mounting hole includes interconnect's first hole section and second hole section, and first hole section is located the one side of keeping away from the reposition of redundant personnel entry, and connecting portion include interconnect's linkage segment and seal segment, and the linkage segment is connected with first hole section, and the aperture of second hole section reduces gradually in the direction of keeping away from first hole section, and the outer wall of seal segment is laminated in order to form seal structure with the inner wall of second hole section mutually.

Furthermore, the outer wall of the connecting portion is provided with a limiting boss, and the end wall of the shunt module is abutted to the limiting boss so as to limit the axial displacement of the shunt module.

Furthermore, the outer wall of the limiting boss is provided with a first screwing stress part, and the outer wall of the second shell is provided with a second screwing stress part.

Further, the flow dividing portion includes a main passage and a plurality of flow dividing passages arranged at intervals in a circumferential direction of the main passage.

Further, the first shell comprises a valve body and a sleeve which are connected with each other, a valve seat is integrally formed on the valve body, and a valve port is formed in the valve seat.

Use the technical scheme of the utility model, this electronic expansion valve includes first casing, case subassembly and one-way shutoff piece, and first casing has the valve pocket. The valve cavity is provided with a valve port and a flow passage which are mutually independent, the unidirectional plugging piece is movably arranged in the valve cavity, when the unidirectional plugging piece is positioned at an opening position, the flow passage is communicated with the valve cavity, and when the unidirectional plugging piece is positioned at a plugging position, the flow passage is isolated from the valve cavity. By adopting the structure, the one-way plugging piece is directly arranged in the first shell of the electronic expansion valve, so that an external pipeline between the electronic expansion valve and the one-way valve can be omitted, and the structure of the device can be simplified while the normal operation of the device is ensured.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a cross-sectional view of an electronic expansion valve according to an embodiment of the present invention;

FIG. 2 shows a schematic structural view of the one-way closure of FIG. 1;

FIG. 3 shows a schematic structural view of the guide sleeve of FIG. 1;

FIG. 4 shows a schematic view of another angle of the guide sleeve of FIG. 1;

FIG. 5 shows a bottom view of the guide sleeve of FIG. 1;

fig. 6 shows a cross-sectional view of an electronic expansion valve according to a second embodiment of the present invention;

fig. 7 shows a schematic structural diagram of an electronic expansion valve according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an expansion valve module; 11. a first housing; 111. a valve port; 112. a connecting portion; 1121. a connecting section; 1122. a sealing section; 113. a limiting boss; 114. a first tightening force receiving portion; 115. a valve body; 116. a sleeve; 117. a valve seat; 118. a valve cavity; 119. An inlet; 12. a valve core assembly; 13. a flow-through channel; 131. a second flow through hole; 20. a shunt module; 21. a second housing; 211. a flow dividing section; 2111. a shunt inlet; 2112. a shunt outlet; 2113. a main channel; 2114. a flow dividing channel; 212. a second mounting hole; 213. a second tightening force receiving portion; 30. a one-way plugging member; 31. a first flow through hole; 32. a first mounting hole; 40. A sealing structure; 50. a rotor assembly; 60. a coil assembly; 70. a nut assembly; 80. a guide sleeve; 81. a first stage; 82. And a second section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 5, a first embodiment of the present invention provides an electronic expansion valve, which includes a first housing 11, a valve core assembly 12, and a one-way blocking element 30. The first housing 11 has a valve chamber 118, and the outlet end of the first housing 11 is provided with the valve port 111 and the flow passage 13 which are independent of each other. By movably arranging the valve core assembly 12 in the valve cavity 118, the valve cavity 118 can be communicated, adjusted or isolated from the valve port 111 by using the valve core assembly 12, so as to control the opening and closing of the electronic expansion valve. In the present embodiment, the one-way blocking piece 30 is movably disposed in the valve cavity 118, the one-way blocking piece 30 has an open position and a blocking position relative to the first housing 11, the one-way blocking piece 30 is movable between the open position and the blocking position, when the one-way blocking piece 30 is located at the open position, the flow passage 13 is communicated with the valve cavity 118, and when the one-way blocking piece 30 is located at the blocking position, the flow passage 13 is blocked from the valve cavity 118.

By applying the electronic expansion valve provided by this embodiment, the valve port 111 and the flow channel 13 which are independent from each other are arranged at the outlet end of the first housing 11, and the one-way blocking piece 30 is directly arranged in the valve cavity 118, and the one-way blocking piece 30 is utilized to control the communication condition between the flow channel 13 and the valve cavity 118, so that a parallel one-way valve is not needed, an external pipeline between the electronic expansion valve and the one-way valve can be omitted, the structure of the device can be simplified while the normal operation of the device is ensured, and the integration level of the device can be further improved.

As shown in fig. 1, the electronic expansion valve further includes a guiding sleeve 80, the guiding sleeve 80 is disposed in the valve cavity 118, the valve core assembly 12 is disposed in the guiding sleeve 80 in a penetrating manner, the valve port 111 is located inside the guiding sleeve 80, the flow channel 13 is located outside the guiding sleeve 80, and the one-way blocking member 30 is movably sleeved on an outer wall of the guiding sleeve 80. The guide sleeve 80 can move and guide the valve core assembly 12 and the one-way plugging piece 30, and can improve the coaxiality and plugging effect of the device.

Wherein, the one-way blocking piece 30 is provided with at least one first flow through hole 31, the outlet end of the first shell 11 is provided with at least one flow channel 13, and the first flow through hole 31 and the flow channel 13 are arranged in a staggered manner. By arranging the first flow through holes 31 and the flow passage 13 in a staggered manner, when the one-way blocking piece 30 is located at the opening position, the one-way blocking piece 30 is spaced from the end of the flow passage 13, at this time, the flow passage 13 can be communicated with the valve cavity 118 through the first flow through holes 31, when the one-way blocking piece 30 is located at the blocking position, the one-way blocking piece 30 covers the flow passage 13, and at this time, the flow passage 13 is blocked from the valve cavity 118.

Specifically, the above-mentioned effects can be achieved by ensuring that the one-way blocking member 30 is provided with at least one first flow through hole 31 and the outlet end of the first housing 11 is provided with at least one flow passage 13. The shapes and sizes of the first flow through hole 31 and the flow channel 13 can be adjusted according to actual requirements.

In order to ensure the plugging effect of the one-way plugging member 30, the electronic expansion valve further comprises a rotation stopping structure, the rotation stopping structure is arranged between the one-way plugging member 30 and the first shell 11 and/or the guide sleeve 80, and the rotation stopping structure is used for limiting the one-way plugging member 30 to rotate relative to the first shell 11, so that the first flow through hole 31 and the flow channel 13 are always arranged in a staggered manner. In the present embodiment, the rotation stopping structure is provided between the one-way blocking piece 30 and the guide sleeve 80.

As shown in fig. 1 and 2, the one-way plugging member 30 has a first mounting hole 32, and the guiding sleeve 80 includes a first section 81 and a second section 82 connected with each other, and the second section 82 is inserted into the first mounting hole 32. The first mounting hole 32 is set to be a non-circular hole, the outer dimension of the second section 82 is matched with the hole type of the first mounting hole 32, and the non-circular hole and the second section 82 are matched to form a rotation stopping structure. Under the restriction of the non-circular hole, the one-way blocking piece 30 cannot rotate relative to the guide sleeve 80, and the guide sleeve is fixedly arranged in the first shell, so that the one-way blocking piece 30 cannot rotate relative to the first shell 11.

In other embodiments, a rotation stopping boss may be provided on one of the unidirectional blocking piece and the guide sleeve, a rotation stopping groove may be provided on the other of the unidirectional blocking piece and the guide sleeve, both the rotation stopping boss and the rotation stopping groove extend along the moving direction of the unidirectional blocking piece, and rotation stopping may also be achieved by cooperation of the rotation stopping groove and the rotation stopping boss. Or a rotation stopping boss and a rotation stopping groove are arranged between the one-way plugging piece and the first shell.

Wherein, the projection of at least partial outer wall of first section 81 on the axial direction is located the outside of the outer wall of second section 82, and first section 81 can carry out the axial spacingly to the one-way shutoff piece 30 of cover establishing on second section 82 like this, avoids the moving distance of one-way shutoff piece on the uide bushing too big, guarantees that one-way shutoff piece can only move between open position and shutoff position. In this embodiment, be provided with the edge milling structure on the second section 82, the overall dimension of second section 82 and the non-round hole looks adaptation of first mounting hole, and the cross sectional dimension of second section 82 is less than the cross sectional dimension of first section 81 to first section 81 can carry out axial spacingly to one-way shutoff piece.

In other embodiments, the shape of the outer surface of the whole guide sleeve may be a non-circular structure such as a polygon to stop rotation of the unidirectional plugging member, and then the first section 81 is provided with a limiting boss to axially limit the unidirectional plugging member by using the limiting boss.

As shown in fig. 1 and 2, the outlet end of the first housing 11 is provided with a plurality of second flow holes 131, the plurality of second flow holes 131 are arranged at intervals in the circumferential direction of the first housing 11 at the outer periphery of the valve port 111, and the second flow holes 131 form the flow channel 13. By providing a plurality of second flow holes 131, the flow capacity of the apparatus can be improved. Specifically, each of the plurality of second flow holes 131 is a circular hole, and the plurality of second flow holes 131 are disposed at equal intervals in the circumferential direction of the first housing 11 on the outer periphery of the valve port 111.

In the present embodiment, the unidirectional plugging member 30 is provided with a plurality of first flow holes 31 at intervals, and the plurality of first flow holes 31 and the plurality of second flow holes 131 are in one-to-one correspondence and are staggered with each other. Specifically, the number, shape and size of the first flow through hole 31 and the second flow through hole 131 can be set according to parameters such as required flow rate, pressure drop and the like, and are not limited to a plurality of small circular holes, and may also be elongated holes or other hole types.

As shown in fig. 1, the first housing 11 includes a valve body 115 and a sleeve 116 connected to each other, a valve seat 117 is integrally formed on the valve body 115, a valve port 111 is formed on the valve seat 117, and a flow passage 13 is formed on the valve body 115. The valve seat 117 and the valve body 115 are integrally formed, so that the coaxiality of the device can be improved, and the valve seat has the advantages of simple structure and convenience in processing.

In order to improve the sealing performance of the device, the electronic expansion valve further comprises a sealing member disposed on a side of the one-way blocking member 30 facing the outlet end of the first housing 11. When the unidirectional plugging member 30 is located at the plugging position, the unidirectional plugging member 30 is attached to the bottom wall of the first housing 11 through a sealing member. Specifically, the sealing element comprises a sealing ring and a plastic sealing gasket. In this embodiment, the seal is a plastic gasket.

In this embodiment, if the electronic expansion valve is placed upside down, the elastic member such as a spring is disposed between the one-way blocking member 30 and the first housing and/or the guide sleeve, so that the elastic member is used to counteract the gravity of the one-way blocking member itself, thereby ensuring the normal operation of the one-way blocking member.

The unidirectional plugging piece 30 is a plate-shaped structure with holes, and has the advantages of simple structure, convenience in processing and low cost.

In this embodiment, the electronic expansion valve may be used in a direct evaporative air conditioning system.

As shown in fig. 6 and 7, a second embodiment of the present invention provides an electronic expansion valve, and the difference between the second embodiment and the first embodiment is that in the second embodiment, an inlet 119 is disposed on a side wall of the first housing 11, and the inlet 119 is communicated with the valve chamber 118. And, the electronic expansion valve further includes a flow divider module 20, the flow divider module 20 is connected to the outlet end of the first housing 11, and the valve port 111 and the flow channel 13 are both communicated with the flow divider module 20.

Specifically, the electronic expansion valve includes an expansion valve module 10 and a splitter module 20, and the expansion valve module 10 and the splitter module 20 are directly connected without an external pipeline therebetween. The expansion valve module 10 includes a first housing 11 and a valve core assembly 12, the first housing 11 has a valve port 111, and the valve core assembly 12 is movably disposed in the first housing 11 to open or close the valve port 111, so as to control the communication condition between the valve port 111 and the valve chamber. Wherein, the flow divider module 20 includes a second housing 21, the second housing 21 has a flow dividing portion 211, the flow dividing portion 211 has a flow dividing inlet 2111 and a plurality of flow dividing outlets 2112, refrigerant enters the flow dividing portion 211 through the flow dividing inlet 2111 and then flows out through the plurality of flow dividing outlets 2112. In the present embodiment, the second housing 21 is connected to the first housing 11, and the branch inlet 2111 communicates with the valve port 111, so that the refrigerant enters the branch inlet 2111 through the valve port 111.

By using the electronic expansion valve provided by the embodiment, the second housing 21 is directly connected to the first housing 11, the shunting inlet 2111 is communicated with the valve port 111, and the refrigerant throttled by the valve port 111 can directly flow into the shunting inlet 2111, so that an external pipeline between the liquid separator and the electronic expansion valve can be eliminated, and the structure of the device can be simplified. In addition, the expansion valve module has a throttling function, so that a throttling component in the liquid separator can be removed, the structure of the device can be further simplified, the installation space of the device is reduced, and the integration level of the device is improved. Because the throttling component in the liquid separator is removed, the throttling effect can be reduced, the flow resistance of the system can be reduced, the pressure loss of the pipe set can be reduced, and the energy efficiency of the system can be improved.

The connection mode of the second housing 21 and the first housing 11 includes: various connection modes such as threaded connection, welding, clamping and fastener connection can be as long as second casing and first casing lug connection can make.

In the present embodiment, the first housing 11 is screwed to the second housing 21. The threaded connection mode is adopted, and the device has the advantages of simple structure, convenience in assembly and convenience in later maintenance.

As shown in fig. 6, the second housing 21 has the second mounting hole 212, and the branch inlet 2111 communicates with the second mounting hole 212, so that communication between the valve port and the branch inlet can be ensured after the first housing 11 and the second housing 21 are connected, and refrigerant can smoothly enter the branch inlet from the valve port. Specifically, the first housing 11 has a connecting portion 112, the valve port 111 is disposed on the connecting portion 112, an inner thread is disposed on an inner wall of the second mounting hole 212, an outer thread is disposed on an outer wall of the connecting portion 112, and the inner thread and the outer thread cooperate to connect the first housing 11 and the second housing 21.

In order to improve the sealing performance of the apparatus, the electronic expansion valve further includes a sealing structure 40 disposed between the connection portion 112 and the second mounting hole 212. Wherein, seal structure includes structures such as sealing washer, interference seal and welded seal.

As shown in fig. 6, in the present embodiment, the second mounting hole 212 includes a first hole section and a second hole section that are connected to each other, the first hole section is located on a side away from the shunt inlet 2111, the connection portion 112 includes a connection section 1121 and a sealing section 1122 that are connected to each other, the connection section 1121 is connected to the first hole section, a hole diameter of the second hole section is gradually reduced in a direction away from the first hole section, and an outer wall of the sealing section 1122 is attached to an inner wall of the second hole section to form the sealing structure 40. Specifically, the inner wall of second hole section and the outer wall of sealed section are the inclined plane, and two inclined planes laminate each other, adopt the conical surface sealed mode of adding threaded connection firmly, have simple structure, the advantage of the assembly of being convenient for. Wherein, still can set up a sealing washer again between second mounting hole and connecting portion, can further promote sealed effect.

As shown in fig. 6, a limit boss 113 is provided on an outer wall of the connecting portion 112, and an end wall of the splitter module 20 abuts against the limit boss 113 to limit the axial displacement of the splitter module 20. The splitter module can be assembled and positioned by using the limiting boss 113, and the connection firmness of the splitter module and the expansion valve module is improved.

As shown in fig. 7, in order to facilitate assembly of the diverter module and the expansion valve module, a first tightening force receiving portion 114 is provided on an outer wall of the limit boss 113, and a second tightening force receiving portion 213 is provided on an outer wall of the second housing 21. Specifically, the outer surface of spacing boss is polygonized structure, and the surface at the top of shunt module is polygonized structure equally, and above-mentioned two polygonized structures form first screw up atress portion and second respectively and screw up the atress portion. When the splitter module and the expansion valve module are assembled, the first screwing stress part and the second screwing stress part are utilized to facilitate the spanner to be stressed so as to screw the splitter module and the expansion valve module.

As shown in fig. 6, the flow dividing portion 211 includes a main passage 2113 and a plurality of flow dividing passages 2114, the plurality of flow dividing passages 2114 being arranged at intervals in the circumferential direction of the main passage 2113. The flow splitting of the flow splitter module can be achieved using a plurality of flow splitting channels 2114. Specifically, the plurality of flow dividing passages 2114 are arranged at equal intervals in the circumferential direction of the main passage 2113, so that the flow dividing effect can be further improved. The valve port of the expansion valve module is aligned to the shunt angle of the shunt module for liquid distribution, so that the pressure loss of the shunt module can be greatly reduced, and the adjusting range of the electronic expansion valve is enlarged.

As shown in fig. 6, the first housing 11 includes a valve body 115 and a sleeve 116 connected to each other, a valve seat 117 is integrally formed on the valve body 115, and the valve port 111 is formed on the valve seat 117. The valve seat 117 and the valve body 115 are integrally formed, so that the coaxiality of the device can be improved, and the valve seat has the advantages of simple structure and convenience in processing.

In this embodiment, the electronic expansion valve further includes a rotor assembly 50, a coil assembly 60 and a nut assembly 70, wherein the coil assembly 60 is used for driving the rotor assembly 50 to rotate, the rotor assembly 50 drives the screw and the valve needle to move, and the nut assembly 70 plays a role in driving and guiding the screw.

Through the device that this embodiment provided, adopt and to have shortened the expansion valve module and the distance of knockout with the shunt module lug connection, furthest. And the throttling component in the liquid separator can be removed, and only once throttling is performed at present, so that the pressure drop of the low-pressure side of the system can be reduced, and the pressure loss of the pipe set can be reduced, thereby improving the energy efficiency of the system. Meanwhile, elements such as a connecting pipe, a one-way valve and the like between the expansion valve and the liquid separator are omitted in the structure, and the structure of a system pipe group is simplified.

To facilitate understanding of the apparatus provided in the present embodiment, the following explanation is made in conjunction with the working process:

(1) and (3) a refrigeration control process: under the refrigeration mode, liquid refrigerant enters the valve body through the inlet pipe, a high-pressure area is formed in the valve body at the moment, and the one-way plugging piece moves linearly under pressure to reach the bottom of the valve body to seal the flow channel. The liquid refrigerant can only reach the flow dividing angle of the flow divider module through the valve port at the bottom of the valve body, and meanwhile, the valve core assembly is converted into linear motion through the rotation of the stepping motor by the thread transmission structure so as to adjust the position of the valve core assembly relative to the valve port and adjust the flow rate of the refrigerant. The throttled high-speed fluid is sprayed to the diversion angle by the valve port, is uniformly distributed into each diversion channel, and is then sent to each branch of the heat exchanger for heat exchange through the liquid separation capillary.

(2) Heating control process: the system circulation is reversed in the heating mode, liquid refrigerant is collected by the flow divider module and then enters the bottom of the valve body, and at the moment, the one-way plugging piece moves upwards under pressure to open a circulation channel. The refrigerant no longer only circulates through the valve port on the valve body, and the flow resistance of the system is greatly reduced, so that the bypass effect is achieved.

The device provided by the embodiment has the following beneficial effects:

(1) the expansion valve module is directly connected with the shunt module, a valve port of the expansion valve module is aligned to a shunt angle of the shunt module, throttling components such as a throttling ring are not needed, and the flow resistance of the system can be reduced. Specifically, because the flow divider module cancels the throttling assembly, the front-back pressure difference of the valve core assembly is increased compared with the existing expansion valve, the adjusting range of the valve core assembly is wider, and the application range is wider;

(2) the electronic expansion valve can be controlled in a single direction and a double direction, and during the one-way control, a diaphragm type one-way plugging piece can be arranged inside the electronic expansion valve to realize the reverse bypass. When the one-way plugging piece is used for a heat pump system, internal bypass can be realized, and a one-way valve structure is not required to be additionally arranged in the system;

(3) the electronic expansion valve considers the flow resistance of the flow divider module and the pressure drop and flow range of each flow path of the flow divider module at the beginning of design, can be simply matched according to the performance parameters of the valve in practical application, and has higher system matching accuracy. Specifically, the splitter module is matched with the expansion valve module, the flow characteristic of the splitter module is matched with the expansion valve module to the utmost extent, and estimation or experimental matching is not needed according to experience. In the prior art, because the liquid separator and the expansion valve are two parts which are independently designed, a manufacturer does not consider whether the flow characteristics are matched or not;

(4) the expansion valve module and the shunt module are integrated, a connecting copper pipe and other fixing devices in the middle are omitted, and the installation is more flexible and simpler.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic expansion valve, comprising:

the valve comprises a first shell (11) and a second shell, wherein the first shell (11) is provided with a valve cavity (118), and the outlet end of the first shell (11) is provided with a valve port (111) and a circulation channel (13) which are independent of each other;

the valve core assembly (12), the valve core assembly (12) is movably arranged in the valve cavity (118), and the valve core assembly (12) is used for enabling the valve cavity (118) to be communicated with, adjusted or isolated from the valve port (111);

the one-way blocking piece (30) is movably arranged in the valve cavity (118), the one-way blocking piece (30) is provided with an opening position and a blocking position relative to the first shell (11), when the one-way blocking piece (30) is located at the opening position, the flow passage (13) is communicated with the valve cavity (118), and when the one-way blocking piece (30) is located at the blocking position, the flow passage (13) is separated from the valve cavity (118).

2. The electronic expansion valve according to claim 1, further comprising a guide sleeve (80), wherein the guide sleeve (80) is disposed in the valve cavity (118), the valve core assembly (12) is disposed through the guide sleeve (80), the valve port (111) is located inside the guide sleeve (80), the flow channel (13) is located outside the guide sleeve (80), and the one-way blocking member (30) is movably sleeved on an outer wall of the guide sleeve (80).

3. An electronic expansion valve according to claim 1 or 2, wherein the one-way closure member (30) is provided with at least one first flow opening (31), the outlet end of the first housing (11) is provided with at least one flow passage (13), and the first flow openings (31) are arranged alternately with the flow passages (13).

4. An electronic expansion valve according to claim 2, further comprising a rotation stop arrangement arranged between the one-way closure member (30) and the first housing (11) and/or the guide sleeve (80), the rotation stop arrangement being adapted to limit rotation of the one-way closure member (30) relative to the first housing (11).

5. An electronic expansion valve according to claim 4, wherein the one-way blocking piece (30) has a first mounting hole (32), the guiding sleeve (80) comprises a first section (81) and a second section (82) connected with each other, the second section (82) is inserted into the first mounting hole (32), the first mounting hole (32) is a non-circular hole, and the outer dimension of the second section (82) is matched with the hole pattern of the first mounting hole (32) to form the rotation stop structure.

6. An electronic expansion valve according to claim 5, wherein a projection of at least part of the outer wall of the first section (81) in the axial direction is located outside the outer wall of the second section (82).

7. An electronic expansion valve according to claim 1, wherein the outlet end of the first housing (11) is provided with a plurality of second flow holes (131), the plurality of second flow holes (131) being provided at intervals in the circumferential direction of the first housing (11) at the periphery of the valve port (111), the second flow holes (131) forming the flow-through channel (13).

8. An electronic expansion valve according to claim 1, wherein the first housing (11) comprises a valve body (115) and a sleeve (116) connected to each other, a valve seat (117) is integrally formed on the valve body (115), the valve port (111) is arranged on the valve seat (117), and the flow-through channel (13) is arranged on the valve body (115).

9. An electronic expansion valve according to claim 1, further comprising a sealing member arranged at a side of the one-way blocking member (30) facing the outlet end of the first housing (11).

10. An electronic expansion valve according to claim 1, wherein an inlet (119) is provided in a side wall of the first housing (11), the inlet (119) communicating with the valve chamber (118), the electronic expansion valve further comprising a flow divider module (20), the flow divider module (20) being connected to an outlet end of the first housing (11), the valve port (111) and the flow channel (13) both communicating with the flow divider module (20).

11. An electronic expansion valve according to claim 10, comprising an expansion valve module (10) and the flow divider module (20), the expansion valve module (10) comprising the first housing (11) and the valve spool assembly (12), the flow divider module (20) comprising a second housing (21), the second housing (21) being connected to the first housing (11), the second housing (21) having a flow dividing portion (211), the flow dividing portion (211) having a flow dividing inlet (2111) and a plurality of flow dividing outlets (2112), the flow dividing inlet (2111) being in communication with the valve port (111).

12. An electronic expansion valve according to claim 11, wherein the first housing (11) is screwed or welded to the second housing (21).

13. An electronic expansion valve according to claim 12, wherein the second housing (21) has a second mounting hole (212), the branch inlet (2111) communicates with the second mounting hole (212), the first housing (11) has a connecting portion (112), the valve port (111) is provided on the connecting portion (112), an inner wall of the second mounting hole (212) is provided with an internal thread, and an outer wall of the connecting portion (112) is provided with an external thread, the internal thread cooperating with the external thread.

14. An electronic expansion valve according to claim 13, further comprising a sealing structure (40) arranged between the connection portion (112) and the second mounting hole (212).

15. An electronic expansion valve according to claim 14, wherein the second mounting hole (212) comprises a first hole section and a second hole section connected to each other, the first hole section is located at a side away from the branch inlet (2111), the connecting portion (112) comprises a connecting section (1121) and a sealing section (1122) connected to each other, the connecting section (1121) is connected to the first hole section, the aperture of the second hole section is gradually reduced in a direction away from the first hole section, and the outer wall of the sealing section (1122) is attached to the inner wall of the second hole section to form the sealing structure (40).

16. An electronic expansion valve according to claim 13, wherein a stop boss (113) is provided on an outer wall of the connecting portion (112), and an end wall of the splitter module (20) abuts against the stop boss (113) to limit axial displacement of the splitter module (20).

17. An electronic expansion valve according to claim 16, wherein the outer wall of the limiting boss (113) is provided with a first screwing force receiving portion (114), and the outer wall of the second housing (21) is provided with a second screwing force receiving portion (213).

18. An electronic expansion valve according to claim 11, wherein the branch portion (211) comprises a main passage (2113) and a plurality of branch passages (2114), the plurality of branch passages (2114) being arranged at intervals in the circumferential direction of the main passage (2113).

19. An electronic expansion valve according to claim 11, wherein the first housing (11) comprises a valve body (115) and a sleeve (116) connected to each other, a valve seat (117) being integrally formed on the valve body (115), the valve seat (117) being provided with the valve port (111).