Electronic expansion valve

Abstract

The application provides an electronic expansion valve, which comprises a first shell having a valve cavity, an outlet end of the first shell being provided with a valve port and a flow passage which are independent of each other; a valve core assembly movably arranged in the valve cavity, the valve core assembly being used for communicating, adjusting or blocking the valve cavity with the valve port; and a one-way blocking piece movably arranged in the valve cavity, the one-way blocking piece having an open position and a blocking position relative to the first shell, the flow passage being communicated with the valve cavity when the one-way blocking piece is in the open position, and the flow passage being blocked from the valve cavity when the one-way blocking piece is in the blocking position. The technical scheme provided by the application can solve the problem of complex structure in the prior art.

Description

Technical Field

[0001] This invention relates to the field of electronic expansion valve technology, and more specifically, to an electronic expansion valve. Background Technology

[0002] Typically, air conditioning systems include an electronic expansion valve and a check valve. The check valve controls the flow of refrigerant during cooling and heating. In existing technology, the electronic expansion valve and the check valve are two separate components, with the check valve connected to the electronic expansion valve via an external pipeline, resulting in a complex structure. Summary of the Invention

[0003] This invention provides an electronic expansion valve to solve the problem of complex structure in the prior art.

[0004] This invention provides an electronic expansion valve, comprising: a first housing having a valve cavity, the outlet end of the first housing having an independent valve port and a flow channel; a valve core assembly movably disposed within the valve cavity, the valve core assembly being used to connect, adjust, or disconnect the valve cavity from the valve port; and a one-way plugging member movably disposed within the valve cavity, the one-way plugging member having an open position and a plugging position relative to the first housing, wherein when the one-way plugging member is in the open position, the flow channel is connected to the valve cavity, and when the one-way plugging member is in the plugging position, the flow channel is disconnected from the valve cavity.

[0005] Furthermore, the electronic expansion valve also includes a guide sleeve, which is disposed inside the valve cavity. The valve core assembly passes through the guide sleeve, the valve port is located inside the guide sleeve, the flow channel is located outside the guide sleeve, and the one-way sealing element is movably sleeved on the outer wall of the guide sleeve.

[0006] Furthermore, the unidirectional sealing component is provided with at least one first flow hole, and the outlet end of the first housing is provided with at least one flow channel, with the first flow hole and the flow channel being arranged alternately.

[0007] Furthermore, the electronic expansion valve also includes an anti-rotation structure disposed between the one-way plug and the first housing and / or guide sleeve, the anti-rotation structure being used to restrict the rotation of the one-way plug relative to the first housing.

[0008] Furthermore, the one-way sealing component has a first mounting hole, and the guide sleeve includes a first section and a second section connected to each other. The second section passes through the first mounting hole, which is a non-circular hole. The outer dimensions of the second section are adapted to the hole shape of the first mounting hole to form an anti-rotation structure.

[0009] Furthermore, at least part of the projection of the outer wall of the first segment in the axial direction is located outside the outer wall of the second segment.

[0010] Furthermore, the outlet end of the first housing is provided with a plurality of second flow holes, which are spaced apart along the circumference of the first housing on the outer periphery of the valve port, forming a flow channel.

[0011] Furthermore, the first housing includes a valve body and a sleeve connected to each other, a valve seat integrally formed on the valve body, a valve port on the valve seat, and a flow channel on the valve body.

[0012] Furthermore, the electronic expansion valve also includes a seal disposed on the side of the one-way plug facing the outlet end of the first housing.

[0013] Furthermore, an inlet is provided on the side wall of the first housing, which is connected to the valve cavity. The electronic expansion valve also includes a flow divider module, which is connected to the outlet end of the first housing. The valve port and the flow passage are both connected to the flow divider module.

[0014] Furthermore, the electronic expansion valve includes an expansion valve module and a flow divider module. The expansion valve module includes a first housing and a valve core assembly. The flow divider module includes a second housing connected to the first housing. The second housing has a flow divider section with a flow divider inlet and multiple flow divider outlets. The flow divider inlet is connected to the valve port.

[0015] Furthermore, the first housing and the second housing are connected by threads or welded together.

[0016] Furthermore, the second housing has a second mounting hole, the diversion inlet communicates with the second mounting hole, the first housing has a connecting part, the valve port is disposed on the connecting part, the inner wall of the second mounting hole is provided with an internal thread, the outer wall of the connecting part is provided with an external thread, and the internal thread and the external thread cooperate with each other.

[0017] Furthermore, the electronic expansion valve also includes a sealing structure disposed between the connection portion and the second mounting hole.

[0018] Furthermore, the second mounting hole includes a first hole section and a second hole section that are connected to each other. The first hole section is located on the side away from the diversion inlet. The connecting part includes a connecting section and a sealing section that are connected to each other. The connecting section is connected to the first hole section. The diameter of the second hole section gradually decreases in the direction away from the first hole section. The outer wall of the sealing section fits against the inner wall of the second hole section to form a sealing structure.

[0019] Furthermore, a limiting boss is provided on the outer wall of the connecting part, and the end wall of the splitter module abuts against the limiting boss to limit the axial displacement of the splitter module.

[0020] Furthermore, a first tightening force-bearing part is provided on the outer wall of the limiting boss, and a second tightening force-bearing part is provided on the outer wall of the second housing.

[0021] Furthermore, the diversion section includes a main channel and multiple diversion channels, which are arranged at intervals along the circumference of the main channel.

[0022] Furthermore, the first housing includes a valve body and a sleeve connected to each other, a valve seat integrally formed on the valve body, and a valve port provided on the valve seat.

[0023] According to the technical solution of this invention, the electronic expansion valve includes a first housing, a valve core assembly, and a one-way sealing element. The first housing has a valve cavity. By providing independent valve ports and flow channels at the outlet end of the first housing, the one-way sealing element is movably disposed within the valve cavity. When the one-way sealing element is in the open position, the flow channel communicates with the valve cavity; when the one-way sealing element is in the sealed position, the flow channel is isolated from the valve cavity. Using the above structure, the one-way sealing element is directly disposed inside the first housing of the electronic expansion valve, eliminating the need for external piping between the electronic expansion valve and the one-way valve, thereby simplifying the device's structure while ensuring normal operation. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A cross-sectional view of an electronic expansion valve provided according to Embodiment 1 of the present invention is shown;

[0026] Figure 2 It shows Figure 1 A schematic diagram of the unidirectional sealing component in the diagram;

[0027] Figure 3 It shows Figure 1 A schematic diagram of the guide sleeve in the middle;

[0028] Figure 4 It shows Figure 1 A structural diagram of the guide sleeve from another angle;

[0029] Figure 5 It shows Figure 1 Bottom view of the guide sleeve in the middle;

[0030] Figure 6 A cross-sectional view of an electronic expansion valve provided according to Embodiment 2 of the present invention is shown;

[0031] Figure 7 A schematic diagram of the structure of an electronic expansion valve provided according to Embodiment 2 of the present invention is shown.

[0032] The above figures include the following reference numerals:

[0033] 10. Expansion valve module; 11. First housing; 111. Valve port; 112. Connecting part; 1121. Connecting section; 1122. Sealing section; 113. Limiting boss; 114. First tightening force-bearing part; 115. Valve body; 116. Sleeve; 117. Valve seat; 118. Valve cavity; 119. Inlet; 12. Valve core assembly; 13. Flow channel; 131. Second flow hole; 20. Diverter module; 21. Second housing; 211. Diverting section; 2111. Diverting inlet; 2112. Diverting outlet; 2113. Main channel; 2114. Diverting channel; 212. Second mounting hole; 213. Second tightening force-bearing part; 30. One-way sealing component; 31. First flow hole; 32. First mounting hole; 40. Sealing structure; 50. Rotor assembly; 60. Coil assembly; 70. Nut assembly; 80. Guide sleeve; 81. First section; 82. Second section. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 5 As shown, Embodiment 1 of the present invention provides an electronic expansion valve, which includes a first housing 11, a valve core assembly 12, and a one-way sealing member 30. The first housing 11 has a valve cavity 118, and its outlet end is provided with an independent valve port 111 and a flow channel 13. By movably arranging the valve core assembly 12 within the valve cavity 118, the valve cavity 118 can be connected to, adjusted, or isolated from the valve port 111, thereby controlling the opening and closing of the electronic expansion valve. In this embodiment, the one-way sealing member 30 is movably arranged within the valve cavity 118. The one-way sealing member 30 has an open position and a sealed position relative to the first housing 11, and can move between the open and sealed positions. When the one-way sealing member 30 is in the open position, the flow channel 13 is connected to the valve cavity 118; when the one-way sealing member 30 is in the sealed position, the flow channel 13 is isolated from the valve cavity 118.

[0036] By applying the electronic expansion valve provided in this embodiment, by setting independent valve ports 111 and flow channels 13 at the outlet end of the first housing 11, and directly setting a one-way sealing element 30 in the valve cavity 118, the one-way sealing element 30 is used to control the connection between the flow channel 13 and the valve cavity 118. There is no need for parallel one-way valves, which can eliminate the external pipeline between the electronic expansion valve and the one-way valve. This simplifies the structure of the device while ensuring normal operation, and thus improves the integration of the device.

[0037] like Figure 1 As shown, the electronic expansion valve also includes a guide sleeve 80, which is disposed within the valve cavity 118. The valve core assembly 12 passes 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 sealing element 30 is movably sleeved on the outer wall of the guide sleeve 80. The guide sleeve 80 can guide both the valve core assembly 12 and the one-way sealing element 30, thereby improving the coaxiality of the device and the sealing effect.

[0038] The one-way sealing member 30 is provided with at least one first flow hole 31, and the outlet end of the first housing 11 is provided with at least one flow channel 13. The first flow hole 31 and the flow channel 13 are staggered. By staggering the first flow hole 31 and the flow channel 13, when the one-way sealing member 30 is in the open position, there is a gap between the ends of the one-way sealing member 30 and the flow channel 13. At this time, the flow channel 13 can communicate with the valve cavity 118 through the first flow hole 31. When the one-way sealing member 30 is in the sealed position, the one-way sealing member 30 will cover the flow channel 13, and at this time the flow channel 13 is isolated from the valve cavity 118.

[0039] Specifically, the above effect can be achieved as long as at least one first flow hole 31 is provided on the unidirectional sealing component 30 and at least one flow channel 13 is provided at the outlet end of the first housing 11. Furthermore, the shape and size of the first flow hole 31 and the flow channel 13 can be adjusted according to actual needs.

[0040] To ensure the sealing effect of the one-way sealing element 30, the electronic expansion valve also includes an anti-rotation structure. This anti-rotation structure is disposed between the one-way sealing element 30 and the first housing 11 and / or the guide sleeve 80. The anti-rotation structure restricts the rotation of the one-way sealing element 30 relative to the first housing 11, thereby ensuring that the first flow hole 31 and the flow channel 13 are always staggered. In this embodiment, the anti-rotation structure is disposed between the one-way sealing element 30 and the guide sleeve 80.

[0041] like Figure 1 and Figure 2As shown, the one-way sealing member 30 has a first mounting hole 32, and the guide sleeve 80 includes a first segment 81 and a second segment 82 connected to each other, with the second segment 82 passing through the first mounting hole 32. By setting the first mounting hole 32 as a non-circular hole and adapting the outer dimensions of the second segment 82 to the hole shape of the first mounting hole 32, the non-circular hole and the second segment 82 cooperate to form an anti-rotation structure. Under the constraint of the non-circular hole, the one-way sealing member 30 will not rotate relative to the guide sleeve 80. Since the guide sleeve is fixedly set in the first housing, it can be ensured that the one-way sealing member 30 will not rotate relative to the first housing 11.

[0042] In other embodiments, an anti-rotation boss can be provided on one of the one-way sealing member and the guide sleeve, and an anti-rotation groove can be provided on the other. Both the anti-rotation boss and the anti-rotation groove extend along the moving direction of the one-way sealing member. The anti-rotation can also be prevented by the cooperation of the anti-rotation groove and the anti-rotation boss. Alternatively, an anti-rotation boss and an anti-rotation groove can be provided between the one-way sealing member and the first housing.

[0043] In this embodiment, at least a portion of the outer wall of the first segment 81 is projected axially onto the outer side of the outer wall of the second segment 82. This allows the first segment 81 to axially limit the movement of the one-way sealing member 30 fitted onto the second segment 82, preventing excessive movement of the one-way sealing member on the guide sleeve and ensuring that the one-way sealing member can only move between the open and closed positions. In this embodiment, the second segment 82 has a milled edge structure, its external dimensions are adapted to the non-circular hole of the first mounting hole 32, and its cross-sectional dimension is smaller than that of the first segment 81. This allows the first segment 81 to axially limit the movement of the one-way sealing member.

[0044] In other embodiments, the outer surface shape of the guide sleeve can be set to a non-circular structure such as a polygon to prevent rotation of the one-way sealing member. Then, a limiting boss is set on the first segment 81 to axially limit the one-way sealing member.

[0045] like Figure 1 and Figure 2 As shown, 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 along the circumference of the first housing 11 on the outer periphery of the valve port 111, and the second flow holes 131 form a flow channel 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 all circular holes, and the plurality of second flow holes 131 are arranged at equal intervals along the circumference of the first housing 11 on the outer periphery of the valve port 111.

[0046] In this embodiment, the unidirectional sealing member 30 is provided with a plurality of first flow holes 31 at intervals, and the plurality of first flow holes 31 correspond one-to-one with a plurality of second flow holes 131 and are arranged alternately. Specifically, the number, shape and size of the first flow holes 31 and the second flow holes 131 can 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 can also be elongated holes or other hole types.

[0047] like Figure 1 As shown, 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 a valve port 111 is provided on the valve seat 117. A flow channel 13 is provided on the valve body 115. By integrally forming the valve seat 117 with the valve body 115, the coaxiality of the device can be improved, and it has the advantages of simple structure and easy processing.

[0048] To improve the sealing performance of the device, the electronic expansion valve also includes a sealing element, which is disposed on the side of the one-way sealing element 30 facing the outlet end of the first housing 11. When the one-way sealing element 30 is in the sealing position, it fits against the bottom wall of the first housing 11 through the sealing element. Specifically, the sealing element includes a sealing ring and a plastic sealing gasket. In this embodiment, the sealing element is a plastic sealing gasket.

[0049] In this embodiment, if the electronic expansion valve is placed upside down, by providing an elastic element such as a spring between the one-way sealing element 30 and the first housing and / or guide sleeve, the one-way sealing element can be used to counteract its own weight, thus ensuring that the one-way sealing element works normally.

[0050] Among them, the one-way sealing component 30 is a plate-shaped structure with holes, which has the advantages of simple structure, easy processing and low cost.

[0051] In this embodiment, the electronic expansion valve can be used in a direct evaporative air conditioning system.

[0052] like Figure 6 and Figure 7 As shown, Embodiment 2 of the present invention provides an electronic expansion valve. The difference between Embodiment 2 and Embodiment 1 is that, in Embodiment 2, an inlet 119 is provided on the side wall of the first housing 11, and the inlet 119 communicates with the valve cavity 118. Furthermore, the electronic expansion valve also includes a flow divider module 20, which is connected to the outlet end of the first housing 11. The valve port 111 and the flow channel 13 are both connected to the flow divider module 20.

[0053] Specifically, the electronic expansion valve includes an expansion valve module 10 and a flow divider module 20. The expansion valve module 10 and the flow divider module 20 are directly connected, and there are no external pipelines between them. 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. The valve core assembly 12 is movably disposed within the first housing 11 to open or close the valve port 111, thereby controlling the communication between the valve port 111 and the valve chamber. The flow divider module 20 includes a second housing 21 with a flow divider section 211. The flow divider section 211 has a flow divider inlet 2111 and multiple flow divider outlets 2112. Refrigerant enters the flow divider section 211 through the flow divider inlet 2111 and then flows out through the multiple flow divider outlets 2112. In this embodiment, the second housing 21 is connected to the first housing 11, and the flow divider inlet 2111 communicates with the valve port 111, facilitating the refrigerant to enter the flow divider inlet 2111 through the valve port 111.

[0054] By applying the electronic expansion valve provided in this embodiment, the second housing 21 is directly connected to the first housing 11, and the diversion inlet 2111 is connected to the valve port 111. The refrigerant, after being throttled by the valve port 111, can directly flow into the diversion inlet 2111. This eliminates the need for external piping between the distributor and the electronic expansion valve, simplifying the device structure. Furthermore, since the expansion valve module itself has a throttling function, the throttling component in the distributor can be removed, further simplifying the device structure, reducing installation space, and improving integration. Removing the throttling component from the distributor also reduces the throttling effect, lowers system flow resistance, reduces pipe pressure loss, and improves system energy efficiency.

[0055] The connection between the second housing 21 and the first housing 11 can be achieved through various methods, such as threaded connection, welding, snap-fit, and fastener connection, as long as the second housing and the first housing can be directly connected.

[0056] In this embodiment, the first housing 11 and the second housing 21 are threaded together. The threaded connection method has the advantages of simple structure, easy assembly, and convenient maintenance.

[0057] like Figure 6 As shown, the second housing 21 has a second mounting hole 212, and the diversion inlet 2111 communicates with the second mounting hole 212. After connecting the first housing 11 and the second housing 21, the communication between the valve port and the diversion inlet can be ensured, thereby ensuring that the refrigerant smoothly enters the diversion inlet from the valve port. Specifically, the first housing 11 has a connecting part 112, the valve port 111 is disposed on the connecting part 112, the inner wall of the second mounting hole 212 is provided with an internal thread, and the outer wall of the connecting part 112 is provided with an external thread. The internal thread and the external thread cooperate to realize the connection between the first housing 11 and the second housing 21.

[0058] To improve the sealing performance of the device, the electronic expansion valve also includes a sealing structure 40 disposed between the connection portion 112 and the second mounting hole 212. The sealing structure includes structures such as a sealing ring, an interference seal, and a welded seal.

[0059] like Figure 6 As shown, in this embodiment, the second mounting hole 212 includes a first hole segment and a second hole segment connected to each other. The first hole segment is located on the side away from the diversion inlet 2111. The connecting part 112 includes a connecting section 1121 and a sealing section 1122 connected to each other. The connecting section 1121 is connected to the first hole segment. The diameter of the second hole segment gradually decreases in the direction away from the first hole segment. The outer wall of the sealing section 1122 fits against the inner wall of the second hole segment to form a sealing structure 40. Specifically, the inner wall of the second hole segment and the outer wall of the sealing section are both inclined surfaces, and the two inclined surfaces fit against each other. A conical hard seal plus threaded connection is adopted, which has the advantages of simple structure and easy assembly. In addition, a sealing ring can be provided between the second mounting hole 212 and the connecting part to further improve the sealing effect.

[0060] like Figure 6 As shown, a limiting boss 113 is provided on the outer wall of the connecting part 112. The end wall of the diverter module 20 abuts against the limiting boss 113 to limit the axial displacement of the diverter module 20. The limiting boss 113 can be used to assemble and position the diverter module and improve the connection between the diverter module and the expansion valve module.

[0061] like Figure 7 As shown, to facilitate the assembly of the distributor module and the expansion valve module, a first tightening force-bearing part 114 is provided on the outer wall of the limiting boss 113, and a second tightening force-bearing part 213 is provided on the outer wall of the second housing 21. Specifically, the outer surface of the limiting boss is a polygonal structure, and the outer surface of the top of the distributor module is also a polygonal structure. These two polygonal structures respectively form the first tightening force-bearing part and the second tightening force-bearing part. When assembling the distributor module and the expansion valve module, the first tightening force-bearing part and the second tightening force-bearing part facilitate the application of force by a wrench to tighten the distributor module and the expansion valve module.

[0062] like Figure 6 As shown, the flow divider 211 includes a main channel 2113 and multiple flow divider channels 2114, which are arranged circumferentially along the main channel 2113. The multiple flow divider channels 2114 enable flow division within the flow divider module. Specifically, the multiple flow divider channels 2114 are arranged at equal intervals circumferentially along the main channel 2113, further enhancing the flow division effect. By aligning the valve port of the expansion valve module with the flow division angle of the flow divider module for liquid distribution, the pressure loss of the flow divider module can be significantly reduced, and the adjustment range of the electronic expansion valve can be increased.

[0063] like Figure 6 As shown, 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 a valve port 111 is provided on the valve seat 117. By integrally forming the valve seat 117 with the valve body 115, the coaxiality of the device can be improved, and it has the advantages of simple structure and easy processing.

[0064] In this embodiment, the electronic expansion valve further includes a rotor assembly 50, a coil assembly 60, and a nut assembly 70. The coil assembly 60 is used to drive the rotor assembly 50 to rotate, the rotor assembly 50 drives the screw and valve needle to move, and the nut assembly 70 plays a role in transmission and guidance for the screw.

[0065] In this embodiment, the electronic expansion valve can be used in a direct evaporative air conditioning system.

[0066] The device provided in this embodiment directly connects the expansion valve module and the distributor module, minimizing the distance between the expansion valve and the distributor. Furthermore, the throttling component in the distributor can be eliminated, resulting in only one throttling operation, which reduces the pressure drop on the low-pressure side of the system, thereby reducing pressure loss in the piping and improving system efficiency. Structurally, it omits connecting pipes and check valves between the expansion valve and the distributor, simplifying the system piping structure.

[0067] To facilitate understanding of the apparatus provided in this embodiment, the following explanation is provided in conjunction with its working process:

[0068] (1) Refrigeration control process: In refrigeration mode, liquid refrigerant enters the valve body through the inlet pipe. At this time, the valve body is a high-pressure zone. The one-way sealing component moves linearly under pressure to the bottom of the valve body to seal the flow channel. The liquid refrigerant can only reach the splitting angle of the distributor module through the valve port at the bottom of the valve body. At the same time, the valve core assembly will be rotated by the stepper motor, which will change the threaded transmission structure to linear motion, thereby adjusting the position of the valve core assembly relative to the valve port and adjusting the refrigerant flow rate. After throttling, the high-speed fluid is sprayed from the valve port to the splitting angle and evenly distributed to each splitting channel. Then, it is sent to each branch of the heat exchanger through the liquid-distributing capillary tube for heat exchange.

[0069] (2) Heating control process: In heating mode, the system circulation is reversed. The liquid refrigerant is collected by the distributor module and enters the bottom of the valve body. At this time, the one-way sealing element moves upward under pressure and opens the flow channel. The refrigerant no longer flows only through the valve port on the valve body, which greatly reduces the system flow resistance and achieves the bypass effect.

[0070] The apparatus provided by the embodiments has the following beneficial effects:

[0071] (1) The expansion valve module is directly connected to the flow divider module. The valve port of the expansion valve module is aligned with the flow divider module's flow angle, eliminating the need for throttling components such as throttling rings, which reduces system flow resistance. Specifically, since the flow divider module eliminates throttling components, the pressure difference across the valve core assembly will be greater than that of existing expansion valves, resulting in a wider adjustment range and a broader application scope for the valve core assembly.

[0072] (2) The electronic expansion valve can be controlled in one or both directions. In one-way control, a diaphragm-type one-way sealing element can be installed inside to achieve reverse bypass. When used in a heat pump system, the one-way sealing element can achieve internal bypass, eliminating the need for an additional one-way valve structure in the system;

[0073] (3) The electronic expansion valve was designed with the flow resistance of the distributor module, as well as the pressure drop and flow range of each flow path of the distributor module in mind. In practical applications, it can be easily matched according to the performance parameters of the valve, resulting in higher system matching accuracy. Specifically, the distributor module is matched with the expansion valve module, and the flow characteristics of the distributor module and the expansion valve module will be matched to the maximum extent, without the need for estimation or experimental matching based on experience. In the prior art, since the distributor and the expansion valve are two independently designed components, the manufacturers do not consider whether the flow characteristics are matched.

[0074] (4) The expansion valve module and the diverter module are integrated into one unit, eliminating the need for intermediate connecting copper pipes and other fixing devices, making installation more flexible and simple.

[0075] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0076] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0077] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or 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 construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0078] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0079] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electronic expansion valve characterized by, The electronic expansion valve comprises: a first shell (11) having a valve cavity (118), an outlet end of the first shell (11) being provided with a valve port (111) and a flow passage (13) independent of each other; a valve core assembly (12) movably arranged in the valve cavity (118), the valve core assembly (12) being used for communicating, adjusting or blocking the valve cavity (118) with the valve port (111); a one-way blocking member (30) movably arranged in the valve cavity (118), the one-way blocking member (30) having an open position and a blocking position relative to the first shell (11), when the one-way blocking member (30) is in the open position, the flow passage (13) is communicated with the valve cavity (118), when the one-way blocking member (30) is in the blocking position, the flow passage (13) is blocked from the valve cavity (118); the electronic expansion valve further comprises a guide sleeve (80) arranged in the valve cavity (118), the valve core assembly (12) is arranged in the guide sleeve (80), the valve port (111) is located inside the guide sleeve (80), the flow passage (13) is located outside the guide sleeve (80), and the one-way blocking member (30) is movably arranged on an outer wall of the guide sleeve (80); the first shell (11) comprises a valve body (115) and a sleeve (116) connected with each other, the valve body (115) is integrally provided with a valve seat (117), the valve seat (117) is provided with the valve port (111), and the valve body (115) is provided with the flow passage (13).

2. The electronic expansion valve according to claim 1, characterized in that The one-way blocking member (30) is provided with at least one first flow passage (31), an outlet end of the first shell (11) is provided with at least one flow passage (13), and the first flow passage (31) and the flow passage (13) are staggered.

3. The electronic expansion valve according to claim 1, wherein The electronic expansion valve further comprises a rotation stopping structure arranged between the one-way blocking member (30) and the first shell (11) and / or the guide sleeve (80), and the rotation stopping structure is used for limiting rotation of the one-way blocking member (30) relative to the first shell (11).

4. The electronic expansion valve according to claim 3, characterized in that The one-way blocking member (30) has a first mounting hole (32), the guide sleeve (80) comprises a first section (81) and a second section (82) connected with each other, the second section (82) is arranged in 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 type of the first mounting hole (32) to form the rotation stopping structure.

5. The electronic expansion valve according to claim 4, wherein The 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).

6. The electronic expansion valve according to claim 1, wherein The outlet end of the first shell (11) is provided with a plurality of second flow-through holes (131) which are arranged at the outer periphery of the valve port (111) along the circumference of the first shell (11) and form the flow-through channel (13).

7. The electronic expansion valve according to claim 1, wherein The electronic expansion valve further comprises a sealing member arranged on the side of the one-way blocking member (30) facing the outlet end of the first shell (11).

8. The electronic expansion valve according to claim 1, wherein The sidewall of the first shell (11) is provided with an inlet (119) which communicates with the valve cavity (118), and the electronic expansion valve further comprises a flow divider module (20) connected to the outlet end of the first shell (11), wherein the valve port (111) and the flow-through channel (13) both communicate with the flow divider module (20).

9. The electronic expansion valve according to claim 8, characterized in that The flow divider module (20) comprises a second shell (21) connected to the first shell (11), and the second shell (21) has a flow dividing portion (211) with a flow dividing inlet (2111) and a plurality of flow dividing outlets (2112), wherein the flow dividing inlet (2111) communicates with the valve port (111).

10. The electronic expansion valve according to claim 9, wherein The first shell (11) and the second shell (21) are threadedly connected or welded.

11. The electronic expansion valve according to claim 10, wherein The second shell (21) has a second mounting hole (212) which communicates with the flow dividing inlet (2111), and the first shell (11) has a connecting portion (112) on which the valve port (111) is arranged, wherein the inner wall of the second mounting hole (212) is provided with an internal thread, and the outer wall of the connecting portion (112) is provided with an external thread which cooperates with the internal thread.

12. The electronic expansion valve according to claim 11, wherein The electronic expansion valve further comprises a sealing structure (40) arranged between the connecting portion (112) and the second mounting hole (212).

13. The electronic expansion valve according to claim 12, wherein The second mounting hole (212) comprises a first hole section and a second hole section which are connected to each other, the first hole section is located on the side away from the flow dividing inlet (2111), the connecting portion (112) comprises a connecting section (1121) and a sealing section (1122) which are connected to each other, the connecting section (1121) is connected to the first hole section, the second hole section gradually reduces in diameter in the direction away from the first hole section, and the outer wall of the sealing section (1122) is fitted with the inner wall of the second hole section to form the sealing structure (40).

14. The electronic expansion valve of claim 11, wherein, The outer wall of the connecting portion (112) is provided with a limiting boss (113), and the end wall of the flow divider module (20) abuts against the limiting boss (113) to limit the axial displacement of the flow divider module (20).

15. The electronic expansion valve according to claim 14, wherein The outer wall of the limiting boss (113) is provided with a first tightening stress receiving portion (114), and the outer wall of the second shell (21) is provided with a second tightening stress receiving portion (213).

16. The electronic expansion valve of claim 9, wherein, The flow distribution part (211) comprises a main channel (2113) and a plurality of flow distribution channels (2114), and the plurality of flow distribution channels (2114) are arranged in a circumferential direction of the main channel (2113).

17. The electronic expansion valve of claim 9, wherein The first shell (11) comprises a valve body (115) and a sleeve (116) connected with each other, the valve body (115) is integrally provided with a valve seat (117), and the valve seat (117) is provided with the valve port (111).

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