CN114076211B

CN114076211B - Electronic expansion valve

Info

Publication number: CN114076211B
Application number: CN202010809364.XA
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: 2024-09-10
Anticipated expiration: 2040-08-12
Also published as: CN114076211A

Abstract

The present application provides an electronic expansion valve, comprising: an expansion valve module comprising a first housing having a valve port and a valve core assembly movably disposed within the first housing to open, regulate, or block the valve port; the diverter module comprises a second shell, the second shell is provided with a diverting part, the diverting part is provided with a diverting inlet and a plurality of diverting outlets, the second shell is connected with the first shell, and the diverting inlet is communicated with the valve port. By the technical scheme provided by the application, the problems of complex tube group structure, uneven liquid separation of the heat exchanger and heat exchange performance attenuation caused by multi-stage throttling of the system in the prior art can be solved.

Description

Electronic expansion valve

Technical Field

The invention relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve.

Background

In general, an air conditioning system is provided with an electronic expansion valve and a knockout, and the knockout is used for uniformly delivering two-phase fluid throttled by the electronic expansion valve to each branch of a heat exchanger for heat exchange.

The liquid separator can be divided into venturi type, pressure drop type, centrifugal type, distributing pipe type and other structures according to the structure. The common pressure drop type refrigerant is characterized in that a throttling component is adopted to reduce the sectional area to generate high-speed flow, so that the gas-liquid two-phase refrigerant is fully mixed and distributed into each branch.

In the prior art, the knockout is connected with the electronic expansion valve through an external pipeline, and a throttling component is required to be arranged in the knockout for throttling, so that the problem of complex structure exists. Besides, the throttle effect of the liquid distributor and the liquid distributing capillary tube is larger besides the throttle effect of the electronic expansion valve. Therefore, the prior art has the problems of complex structure and multi-stage throttling.

Disclosure of Invention

The invention provides an electronic expansion valve, which aims to solve the problems of complex structure and multi-stage throttling in the prior art.

The invention provides an electronic expansion valve, which comprises: an expansion valve module comprising a first housing having a valve port and a valve core assembly movably disposed within the first housing to open, regulate, or block the valve port; the diverter module comprises a second shell, the second shell is provided with a diverting part, the diverting part is provided with a diverting inlet and a plurality of diverting outlets, the second shell is connected with the first shell, and the diverting inlet is communicated with the valve port.

Further, the first shell is in threaded connection or welded fixation with the second shell.

Further, the second casing has the mounting hole, and reposition of redundant personnel entry and mounting hole intercommunication, and first casing has connecting portion, and the valve port setting is provided with the internal thread on the inner wall of mounting hole, is provided with the external screw thread on the outer wall of connecting portion, and the internal thread cooperatees with the external screw thread.

Further, the electronic expansion valve further includes a sealing structure disposed between the connection portion and the mounting hole.

Further, the 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 includes interconnect's linkage segment and seal section, and the linkage segment is connected with first hole section, and the aperture of second hole section reduces in the direction of keeping away from first hole section gradually, and seal section's outer wall is laminated with the inner wall of second hole section mutually in order to form seal structure.

Further, a limiting boss is arranged on the outer wall of the connecting part, and the end wall of the diverter module is abutted against the limiting boss so as to limit the axial displacement of the diverter module.

Further, the outer wall of the limiting boss is provided with a first tightening stressed part, and the outer wall of the second shell is provided with a second tightening stressed part.

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

Further, the first housing 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 on the valve seat.

Further, the electronic expansion valve further comprises a one-way plugging piece, the one-way plugging piece is movably arranged in the first shell, a circulation channel is arranged on the first shell, the circulation channel and the valve port are located at the same end of the first shell, one end of the circulation channel is communicated with the second shell, the other end of the circulation channel corresponds to the valve cavity of the first shell, the one-way plugging piece 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 circulation channel is communicated with the valve cavity, and when the one-way plugging piece is located at the plugging position, the circulation channel is separated from the valve cavity.

Further, the first shell is provided with a valve cavity, the outlet end of the first shell is provided with a valve port and a circulation channel which are mutually independent, and the valve core assembly and the one-way plugging piece are movably arranged in the valve cavity.

Further, 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 circulating 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.

Further, at least one first flow hole is formed in the unidirectional plugging piece, at least one flow channel is formed in the outlet end of the first shell, and the first flow holes and the flow channels are arranged in a staggered mode.

Further, the electronic expansion valve further comprises a rotation stopping structure, wherein the rotation stopping structure is arranged between the unidirectional blocking piece and the first shell and/or the guide sleeve, and the rotation stopping structure is used for limiting the unidirectional blocking piece to rotate relative to the first shell.

Further, the unidirectional plugging piece is provided with a mounting hole, the guide sleeve comprises a first section and a second section which are connected with each other, the second section is arranged in the mounting hole in a penetrating mode, the mounting hole is a non-round hole, and the outline dimension of the second section is matched with the hole pattern of the mounting hole to form a rotation stopping structure.

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

Further, the outlet end of the first housing is provided with a plurality of second flow holes, the plurality of second flow holes are arranged at the periphery of the valve port at intervals along the circumferential direction of the first housing, and the second flow holes form a flow 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 formed on the valve seat, and a circulation channel is formed on the valve body.

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

By applying the technical scheme of the invention, the electronic expansion valve comprises an expansion valve module and a shunt module. The expansion valve module comprises a first shell and a valve core assembly, wherein the first shell is provided with a valve port, the valve core assembly is movably arranged in the first shell to open, adjust or block the valve port, the flow divider module comprises a second shell, the second shell is provided with a flow dividing part, and the flow dividing part is provided with a flow dividing inlet and a plurality of flow dividing outlets. The second shell is directly connected with the first shell, the split inlet is communicated with the valve port, an external pipeline between the liquid dispenser and the electronic expansion valve is omitted, and the expansion valve module has a throttling function, so that a throttling component in the liquid dispenser can be omitted, and the structure of the device can be simplified. And because the throttling component in the liquid separator is removed, the throttling effect can be reduced, the pressure loss of the pipe group is reduced, and the energy efficiency of the system is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

Fig. 1 shows a cross-sectional view of an electronic expansion valve provided according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of an electronic expansion valve according to a first embodiment of the present invention;

fig. 3 shows a cross-sectional view of an electronic expansion valve provided according to a second embodiment of the present invention;

FIG. 4 shows a schematic structural view of the one-way closure of FIG. 3;

FIG. 5 shows a schematic structural view of the guide sleeve of FIG. 3;

FIG. 6 shows a schematic view of another angle of the guide sleeve of FIG. 3;

fig. 7 shows a bottom view of the guide sleeve of fig. 3.

Wherein the above figures include the following reference numerals:

10. An expansion valve module; 11. a first housing; 111. a valve port; 112. a connection part; 1121. a connection section; 1122. a sealing section; 113. a limit boss; 114. a first tightening force receiving portion; 115. a valve body; 116. a sleeve; 117. a valve seat; 118. a valve cavity; 12. a valve core assembly; 13. a flow channel; 131. a second flow hole; 20. a diverter module; 21. a second housing; 211. a split flow section; 2111. a split inlet; 2112. a split outlet; 2113. a main channel; 2114. a shunt channel; 212. a mounting hole; 213. a second tightening force receiving portion; 30. a one-way closure; 31. a first flow hole; 32. a 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 section; 82. and a second section.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 and 2, a first embodiment of the present invention provides an electronic expansion valve, which includes an expansion valve module 10 and a diverter module 20, wherein the expansion valve module 10 is directly connected with the diverter module 20, and no external pipeline exists between the two. The expansion valve module 10 includes a first housing 11 and a valve core assembly 12, wherein 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, regulate or block the valve port 111, thereby controlling the communication condition between the valve port 111 and the valve cavity. Wherein the diverter module 20 includes a second housing 21, the second housing 21 having a diverter portion 211, the diverter portion 211 having a diverter inlet 2111 and a plurality of diverter outlets 2112, the refrigerant entering the diverter portion 211 through the diverter inlet 2111 and then exiting through the plurality of diverter outlets 2112. In the present embodiment, the second housing 21 is connected to the first housing 11, and the shunt inlet 2111 communicates with the valve port 111, facilitating the refrigerant to enter the shunt inlet 2111 through the valve port 111.

By using the electronic expansion valve provided in this embodiment, the second housing 21 is directly connected to the first housing 11, and the split inlet 2111 is communicated with the valve port 111, so that the refrigerant can directly flow into the split inlet 2111 after being throttled by the valve port 111, and an external pipeline between the liquid separator and the electronic expansion valve can be omitted, so that 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 distributor can be omitted, 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 uniform liquid separation of the heat exchanger can be ensured, the pressure loss of the tube group can be reduced, and the energy efficiency of the system can be improved.

The connection manner of the second housing 21 and the first housing 11 includes: the second shell and the first shell can be directly connected by various connection modes such as threaded connection, welding, clamping connection, fastening connection and the like. Specifically, the first housing and the second housing are coaxially disposed.

In the present embodiment, the first housing 11 is screwed with the second housing 21. The threaded connection mode is adopted, and the threaded connection device has the advantages of being simple in structure, convenient to assemble and convenient to maintain in the later period.

As shown in fig. 1, the second housing 21 has a mounting hole 212, and the split inlet 2111 communicates with the mounting hole 212, so that after the first housing 11 and the second housing 21 are connected, communication between the valve port and the split inlet can be ensured, and thus, refrigerant can be smoothly introduced into the split inlet from the valve port. Specifically, the first housing 11 has a connection portion 112, the valve port 111 is disposed on the connection portion 112, an internal thread is disposed on an inner wall of the mounting hole 212, an external thread is disposed on an outer wall of the connection portion 112, and the internal thread cooperates with the external thread to connect the first housing 11 with the second housing 21.

In order to enhance the sealing performance of the device, the electronic expansion valve further includes a sealing structure 40 disposed between the connection portion 112 and the mounting hole 212. The sealing structure comprises a sealing ring, interference sealing, welding sealing and other structures.

As shown in fig. 1, in the present embodiment, the mounting hole 212 includes 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 shunt inlet 2111, the connection portion 112 includes a connection section 1121 and a sealing section 1122 connected to each other, the connection section 1121 is connected to the first hole section, and the aperture 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 laminating each other, adopt the sealed mode of threaded connection that adds of conical surface hard, have simple structure, the advantage of being convenient for assemble. Wherein, can also set up a sealing washer again between mounting hole and connecting portion, can further promote sealed effect.

As shown in fig. 1, a limiting boss 113 is disposed on an outer wall of the connecting portion 112, and an end wall of the diverter module 20 abuts against the limiting boss 113 to limit axial displacement of the diverter module 20. The diverter module can be assembled and positioned by utilizing the limiting boss 113, and the connection firmness of the diverter module and the expansion valve module is improved.

As shown in fig. 2, 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 the limiting boss is of a polygonal structure, the outer surface of the top of the diverter module is of a polygonal structure, and the two polygonal structures respectively form a first tightening stressed part and a second tightening stressed part. When assembling the diverter module and the expansion valve module, the wrench is conveniently stressed by utilizing the first tightening stressed part and the second tightening stressed part to screw the diverter module and the expansion valve module.

As shown in fig. 1, the diverting portion 211 includes a main passage 2113 and a plurality of diverting passages 2114, the plurality of diverting passages 2114 being arranged at intervals along the circumferential direction of the main passage 2113. The splitting of the splitter module can be accomplished with a plurality of splitting channels 2114. Specifically, the plurality of diverting passages 2114 are equally spaced apart along the circumferential direction of the main passage 2113, so that the diverting effect can be further improved. The valve port of the expansion valve module is aligned with the flow dividing angle of the flow divider module to divide liquid, so that the pressure loss of the flow divider module can be greatly reduced, and the adjusting range of the electronic expansion valve is improved.

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 provided on the valve body 115, and a valve port 111 is provided on the valve seat 117. Through with disk seat 117 and valve body 115 integrated into one piece, can promote the axiality of device, and have simple structure, the advantage of being convenient for 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 rod and the valve needle to move, and the nut assembly 70 plays a role in driving and guiding the screw rod.

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

Through the device that this embodiment provided, the adoption is with expansion valve module and shunt module direct connection, has shortened the distance of expansion valve and knockout to the maximum extent. And the throttling component in the liquid separator can be removed, only one throttling is needed at present, the pressure drop of the low pressure side of the system can be reduced, the pressure loss of the pipe group can be reduced, and the energy efficiency of the system can be improved. Meanwhile, elements such as a connecting pipe, a one-way valve and the like between the expansion valve and the liquid separator are omitted structurally, and the system pipe group structure is simplified.

As shown in fig. 3 to 7, the second embodiment of the present invention provides an electronic expansion valve, which is different from the first embodiment in that in the second embodiment, the electronic expansion valve further includes a unidirectional blocking member 30, the unidirectional blocking member 30 is movably disposed in the first housing 11, the first housing 11 is provided with a circulation channel 13, the circulation channel 13 and the valve port 111 are located at the same end of the first housing 11, one end of the circulation channel 13 is communicated with the second housing 21, the other end of the circulation channel 13 is disposed corresponding to the valve cavity of the first housing 11, the unidirectional blocking member 30 has an open position and a blocking position relative to the first housing 11, when the unidirectional blocking member 30 is located at the open position, the circulation channel 13 is in communication with the valve cavity, and when the unidirectional blocking member 30 is located at the blocking position, the circulation channel 13 is blocked from the valve cavity.

Specifically, the first housing 11 has a valve chamber 118, and the outlet end of the first housing 11 is provided with a valve port 111 and a flow passage 13 independent of each other. By movably disposing the valve element assembly 12 in the valve chamber 118, the valve chamber 118 can be communicated with or blocked from the valve port 111 by the valve element assembly 12, thereby controlling the opening and closing of the electronic expansion valve. In the present embodiment, the one-way closure member 30 is movably disposed in the valve chamber 118, the one-way closure member 30 has an open position and a closed position with respect to the first housing 11, the one-way closure member 30 is movable between the open position and the closed position, the flow passage 13 is in communication with the valve chamber 118 when the one-way closure member 30 is in the open position, and the flow passage 13 is blocked from the valve chamber 118 when the one-way closure member 30 is in the closed position.

By using the electronic expansion valve provided by the embodiment, the valve port 111 and the circulation channel 13 which are mutually independent are arranged at the outlet end of the first shell 11, the unidirectional blocking piece 30 is directly arranged in the valve cavity 118, the communication condition between the circulation channel 13 and the valve cavity 118 is controlled by using the unidirectional blocking piece 30, the parallel check valve is not needed, an external pipeline between the electronic expansion valve and the check 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 improved.

As shown in fig. 3, the electronic expansion valve further includes a guide sleeve 80, the guide sleeve 80 is disposed in the valve cavity 118, the valve core assembly 12 is disposed in the guide sleeve 80 in a penetrating manner, the valve port 111 is located inside the guide sleeve 80, the flow channel 13 is located outside the guide sleeve 80, and the unidirectional plugging member 30 is movably sleeved on the outer wall of the guide sleeve 80. The guide sleeve 80 can not only move and guide the valve core assembly 12, but also move and guide the unidirectional plugging piece 30, so that the coaxiality and the plugging effect of the device can be improved.

Wherein, the unidirectional plugging member 30 is provided with at least one first flow hole 31, the outlet end of the first housing 11 is provided with at least one flow channel 13, and the first flow holes 31 and the flow channels 13 are staggered. By staggering the first flow holes 31 with the flow channels 13, when the one-way closure member 30 is in the open position, the one-way closure member 30 is spaced from the end of the flow channels 13, and the flow channels 13 can communicate with the valve chamber 118 through the first flow holes 31, and when the one-way closure member 30 is in the closed position, the one-way closure member 30 covers the flow channels 13, and the flow channels 13 are blocked from the valve chamber 118.

Specifically, the above effect can be achieved by ensuring that at least one first flow hole 31 is provided in the one-way plugging member 30, and at least one flow channel 13 is provided at the outlet end of the first housing 11. The shape and size of the first flow hole 31 and the flow channel 13 can be adjusted according to actual requirements.

In order to ensure the blocking effect of the unidirectional blocking piece 30, the electronic expansion valve further comprises a rotation stopping structure, wherein the rotation stopping structure is arranged between the unidirectional blocking piece 30 and the first shell 11 and/or the guide sleeve 80 and is used for limiting the unidirectional blocking piece 30 to rotate relative to the first shell 11, so that the first flow holes 31 and the flow channels 13 are always staggered. In this embodiment, the anti-rotation structure is disposed between the one-way closure 30 and the guide sleeve 80.

As shown in fig. 3 and 4, the one-way closure 30 has a mounting hole 32, and the guide sleeve 80 includes a first section 81 and a second section 82 connected to each other, the second section 82 being inserted into the mounting hole 32. By providing the mounting hole 32 as a non-circular hole, the outer dimension of the second section 82 is adapted to the hole pattern of the mounting hole 32, and the non-circular hole cooperates with the second section 82 to form a rotation stopping structure. Under the restriction of the non-round hole, the unidirectional plugging piece 30 cannot rotate relative to the guide sleeve 80, and the unidirectional plugging piece 30 cannot rotate relative to the first shell 11 due to the fact that the guide sleeve is fixedly arranged in the first shell.

In other embodiments, a rotation stopping boss may be disposed on one of the unidirectional plugging member and the guide sleeve, and a rotation stopping groove may be disposed on the other of the unidirectional plugging member and the guide sleeve, where the rotation stopping boss and the rotation stopping groove extend along the movement direction of the unidirectional plugging member, and the rotation stopping can be achieved by the 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 unidirectional plugging piece and the first shell.

Wherein, the outer wall of at least part first section 81 is located the outside of the outer wall of second section 82 in the ascending projection of axial direction, and so first section 81 can carry out axial spacing to the one-way shutoff piece 30 of cover on second section 82, avoids the removal distance of one-way shutoff piece on the uide bushing too big, guarantees that one-way shutoff piece can only remove between open position and shutoff position. In this embodiment, the second section 82 is provided with a milled edge structure, the external dimension of the second section 82 is adapted to the non-circular hole of the mounting hole, and the cross-sectional dimension of the second section 82 is smaller than that of the first section 81, so that the first section 81 can axially limit the unidirectional plugging member.

In other embodiments, the overall outer surface shape of the guide sleeve may be configured to be a non-circular structure such as a polygon, so as to stop the unidirectional blocking member from rotating, and then a limiting boss is disposed on the first section 81, and the unidirectional blocking member is axially limited by using the limiting boss.

As shown in fig. 3 and 4, 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 outer periphery of the valve port 111, the second flow holes 131 forming the flow passage 13. By providing a plurality of second flow holes 131, the flow capacity of the device can be improved. Specifically, the plurality of second flow holes 131 are circular holes, and the plurality of second flow holes 131 are provided at equal intervals in the circumferential direction of the first housing 11 on the outer periphery of the valve port 111.

In this embodiment, a plurality of first flow holes 31 are disposed on the unidirectional plugging member 30 at intervals, and the plurality of first flow holes 31 and the plurality of second flow holes 131 are disposed in a one-to-one correspondence and staggered manner. Specifically, the number, shape and size of the first and second through holes 31 and 131 may be set according to the required flow rate, pressure drop and other parameters, and are not limited to a plurality of small round holes, but may be elongated holes or other holes.

As shown in fig. 3, the first housing 11 includes a valve body 115 and a sleeve 116 connected to each other, a valve seat 117 is integrally provided on the valve body 115, a valve port 111 is provided on the valve seat 117, and a flow passage 13 is provided on the valve body 115. Through with disk seat 117 and valve body 115 integrated into one piece, can promote the axiality of device, and have simple structure, the advantage of being convenient for processing.

In order to enhance the sealing performance of the device, the electronic expansion valve further comprises a sealing member provided at a side of the one-way closure member 30 facing the outlet end of the first housing 11. When the one-way closure member 30 is in the closure position, the one-way closure member 30 is attached to the bottom wall of the first housing 11 by a seal. 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 inverted, by providing an elastic member such as a spring between the unidirectional blocking member 30 and the first housing and/or the guide sleeve, the gravity of the unidirectional blocking member itself is offset by the elastic member, so that the unidirectional blocking member can be ensured to work normally.

The unidirectional plugging member 30 has a plate structure with holes, and has the advantages of simple structure, convenient processing and low cost.

In order to facilitate understanding of the apparatus provided in this embodiment, the following explanation is made in connection with the working procedure:

(1) The refrigeration control process comprises the following steps: in the refrigerating mode, liquid refrigerant enters the valve body through the inlet pipe, a high-pressure area is arranged in the valve body, and the unidirectional blocking piece moves linearly under pressure to reach the bottom of the valve body to block the circulation channel. The liquid refrigerant can only reach the diversion angle of the diverter module through the valve port at the bottom of the valve body, and meanwhile, the valve core component is converted into linear motion through the rotation of the stepping motor by the threaded transmission structure, so that the position of the valve core component relative to the valve port is adjusted, and the flow of the refrigerant is adjusted. The throttled high-speed fluid is sprayed to the diversion angle by the valve port and is uniformly distributed to all diversion channels, and then is sent to all branches of the heat exchanger for heat exchange by the liquid diversion capillary tube.

(2) And (3) heating control process: the system circulates reversely in the heating mode, liquid refrigerant is collected by the diverter module and enters the bottom of the valve body, and at the moment, the unidirectional plugging piece moves upwards under pressure to open the circulation channel. The refrigerant does not circulate only through the valve port on the valve body, so that the flow resistance of the system is greatly reduced, and 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 flow divider module, the valve port of the expansion valve module is aligned with the flow dividing angle of the flow divider module, and throttling components such as a throttling ring are not needed, so that the flow resistance of the system can be reduced. Specifically, as 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 interval 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 when in unidirectional control, a diaphragm type unidirectional plugging piece can be arranged in the electronic expansion valve to realize reverse bypass. When the one-way plugging piece is used for a heat pump system, the one-way plugging piece can realize internal bypass, and a one-way valve structure is not required to be additionally arranged in the system;

(3) The electronic expansion valve has the advantages that the flow resistance of the flow divider module, the pressure drop and the flow range of each flow path of the flow divider module are considered at the beginning of design, the matching can be simply carried out according to the performance parameters of the valve during practical application, and the system matching accuracy is higher. Specifically, the flow characteristics of the flow divider module and the expansion valve module are matched to play a very important role, and estimation or experimental matching is not needed according to experience. In the prior art, as the liquid separator and the expansion valve are two parts which are independently designed, manufacturers cannot consider whether the flow characteristics are matched;

(4) The expansion valve module and the diverter module are integrated into a whole, so that a connecting copper pipe and other fixing devices in the middle are omitted, and the installation is more flexible and concise.

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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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, characterized in that it comprises:

An expansion valve module (10), the expansion valve module (10) comprising a first housing (11) and a valve cartridge assembly (12), the first housing (11) having a valve port (111), the valve cartridge assembly (12) being movably disposed within the first housing (11) to open, regulate or block the valve port (111);

-a diverter module (20), the diverter module (20) comprising a second housing (21), the second housing (21) having a diverter portion (211), the diverter portion (211) having a diverter inlet (2111) and a plurality of diverter outlets (2112), the second housing (21) being connected to the first housing (11) and the diverter inlet (2111) being in communication with the valve port (111), the diverter portion (211) comprising a main channel (2113) and a plurality of diverter channels (2114), the plurality of diverter channels (2114) being arranged at intervals along the circumference of the main channel (2113);

The one-way shutoff piece (30), one-way shutoff piece (30) movably sets up in first casing (11), be provided with circulation passageway (13) on first casing (11), circulation passageway (13) with valve port (111) are located the same end of first casing (11), the one end of circulation passageway (13) with second casing (21) intercommunication, the other end of circulation passageway (13) corresponds the valve pocket setting of first casing (11), one-way shutoff piece (30) are relative first casing (11) have open position and shutoff position, works as when one-way shutoff piece (30) are located open position, circulation passageway (13) with the valve pocket intercommunication, works as one-way shutoff piece (30) are located when shutoff position, circulation passageway (13) with the valve pocket cuts off.

2. Electronic expansion valve according to claim 1, characterized in that the first housing (11) is screwed or welded to the second housing (21).

3. The electronic expansion valve according to claim 2, wherein the second housing (21) has a mounting hole (212), the shunt inlet (2111) communicates with the mounting hole (212), the first housing (11) has a connecting portion (112), the valve port (111) is disposed on the connecting portion (112), an internal thread is disposed on an inner wall of the mounting hole (212), an external thread is disposed on an outer wall of the connecting portion (112), and the internal thread is mated with the external thread.

4. An electronic expansion valve according to claim 3, further comprising a sealing structure (40) arranged between the connection portion (112) and the mounting hole (212).

5. The electronic expansion valve of claim 4, wherein the mounting bore (212) includes first and second bore sections connected to each other, the first bore section being located on a side remote from the shunt inlet (2111), the connecting portion (112) including a connecting section (1121) and a sealing section (1122) connected to each other, the connecting section (1121) being connected to the first bore section, the bore diameter of the second bore section being tapered in a direction remote from the first bore section, an outer wall of the sealing section (1122) being in abutment with an inner wall of the second bore section to form the sealing structure (40).

6. An electronic expansion valve according to claim 3, characterized in that a limit boss (113) is provided on the outer wall of the connecting portion (112), and the end wall of the diverter module (20) abuts against the limit boss (113) to limit the axial displacement of the diverter module (20).

7. The electronic expansion valve according to claim 6, wherein 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).

8. The electronic expansion valve according to claim 1, characterized in that the first housing (11) comprises a valve body (115) and a sleeve (116) which are connected with 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).

9. The electronic expansion valve according to claim 1, characterized in that the first housing (11) has a valve cavity (118), the outlet end of the first housing (11) is provided with the valve port (111) and the flow channel (13) independent of each other, and the valve core assembly (12) and the unidirectional plug (30) are both movably arranged in the valve cavity (118).

10. The electronic expansion valve according to claim 9, 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 in the guide sleeve (80) in a penetrating manner, the valve port (111) is disposed inside the guide sleeve (80), the flow channel (13) is disposed outside the guide sleeve (80), and the one-way blocking member (30) is movably disposed on an outer wall of the guide sleeve (80).

11. Electronic expansion valve according to claim 9 or 10, characterized in that the unidirectional 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 channel (13), the first flow openings (31) being staggered with the flow channel (13).

12. The electronic expansion valve according to claim 10, further comprising a rotation stopping structure arranged between the unidirectional closure member (30) and the first housing (11) and/or the guide sleeve (80), the rotation stopping structure being adapted to limit rotation of the unidirectional closure member (30) relative to the first housing (11).

13. The electronic expansion valve according to claim 12, wherein the unidirectional plugging piece (30) is provided with a mounting hole (32), the guide sleeve (80) comprises a first section (81) and a second section (82) which are connected with each other, the second section (82) is penetrated in the mounting hole (32), the mounting hole (32) is a non-circular hole, and the external dimension of the second section (82) is matched with the hole pattern of the mounting hole (32) to form the rotation stopping structure.

14. Electronic expansion valve according to claim 13, characterized in that the projection of the outer wall of at least part of the first section (81) in the axial direction is located outside the outer wall of the second section (82).

15. The electronic expansion valve according to claim 9, 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 outer periphery of the valve port (111), the second flow holes (131) forming the flow passage (13).

16. The electronic expansion valve according to claim 9, characterized in that the first housing (11) comprises a valve body (115) and a sleeve (116) which are connected with each other, a valve seat (117) is integrally formed on the valve body (115), the valve port (111) is formed on the valve seat (117), and the flow passage (13) is formed on the valve body (115).

17. The electronic expansion valve according to claim 9, further comprising a seal arranged on a side of the unidirectional closure member (30) facing the outlet end of the first housing (11).