Valve core structure and directional valve

Abstract

This application relates to the field of fluid control technology, and more specifically, to a valve core structure and a reversing valve. The valve core structure has a first channel and a second channel that are not interconnected; wherein the flow area of ​​the first channel is smaller than the flow area of ​​the second channel, thereby increasing the minimum distance between the first and second channels. By optimizing its structure, this valve core structure can improve the efficiency of an air conditioning system.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, and more specifically, to a valve core structure and a directional valve for a reversing valve. Background Technology

[0002] Reversing valves are commonly used components in air conditioning systems. Taking a vehicle's air conditioning system as an example, a reversing valve can change the direction of refrigerant flow, thereby enabling switching between cooling and heating modes.

[0003] In related technologies, the valve core structure of a reversing valve generally includes two channels that are not interconnected. During the operation of an air conditioning system, because the two channels are close together, heat within the valve core structure can be transferred from the high-temperature side to the low-temperature side, resulting in a reduction in the overall efficiency of the air conditioning system. Utility Model Content

[0004] A primary objective of this application is to overcome at least one of the deficiencies of the prior art described above and to provide a valve core structure for a reversing valve. This valve core structure can improve the efficiency of an air conditioning system.

[0005] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0006] According to one aspect of this application, a valve core structure for a reversing valve is provided, the valve core structure having a first channel and a second channel that are not interconnected.

[0007] The flow area of ​​the first channel is smaller than that of the second channel to increase the minimum distance between the first channel and the second channel.

[0008] According to one embodiment of this application, the first channel includes an inlet end and an outlet end, and the flow area of ​​the first channel remains consistent in the direction from the inlet end to the outlet end; and / or, the second channel includes an inlet end and an outlet end, and the flow area of ​​the second channel remains consistent in the direction from the inlet end to the outlet end.

[0009] According to one embodiment of this application, the inlet end of the first channel is used to connect to the compressor outlet; the outlet end of the second channel is used to connect to the compressor inlet.

[0010] According to one embodiment of this application, the diameter of the first channel is the same as the diameter of the compressor outlet; and / or, the diameter of the second channel is the same as the diameter of the compressor inlet.

[0011] According to one embodiment of this application, the first channel includes a first inlet section, a first straight section, and a first outlet section connected in sequence; the second channel includes a second inlet section, a second straight section, and a second outlet section connected in sequence; the first straight section and the second straight section are respectively located on both sides of the center point of the valve core structure, and the distance between the first straight section and the second straight section is the minimum distance between the first channel and the second channel.

[0012] According to one embodiment of this application, the first inlet section includes a third straight section and a first arc section, the third straight section being connected to the outer wall of the valve core structure, and the first arc section connecting the third straight section and the first straight section; the first outlet section includes a fourth straight section and a second arc section, the fourth straight section being connected to the outer wall of the valve core structure, and the second arc section connecting the first straight section and the fourth straight section; the second inlet section includes a fifth straight section and a third arc section, the fifth straight section being connected to the outer wall of the valve core structure, and the third arc section connecting the fifth straight section and the second straight section; the second outlet section includes a sixth straight section and a fourth arc section, the sixth straight section being connected to the outer wall of the valve core structure, and the fourth arc section connecting the second straight section and the sixth straight section.

[0013] According to one embodiment of this application, the third straight segment and the sixth straight segment are coaxially arranged; the fourth straight segment and the fifth straight segment are coaxially arranged; wherein, the axis of the third straight segment and the axis of the fourth straight segment are perpendicular to each other.

[0014] According to one embodiment of this application, the valve core structure includes a first core and a second core. The first core has a first surface that abuts against the second core, and the second core has a second surface that abuts against the first core. A first channel groove and a second channel groove are formed on the first surface. A third channel groove and a fourth channel groove are formed on the second surface. The first channel groove and the third channel groove form the first channel. The second channel groove and the fourth channel groove form the second channel.

[0015] According to one embodiment of this application, a positioning structure is provided between the first surface and the second surface, and the first core and the second core are inserted and engaged through the positioning structure; the positioning structure includes multiple structures, and each positioning structure is at the same distance from the center line of the valve core structure; and / or, the first surface and the second surface are connected by welding.

[0016] According to another aspect of this application, a reversing valve includes: a valve body; a valve core structure, the valve core structure being the valve core structure described above; the valve body having a valve cavity and a plurality of valve holes communicating with the valve cavity, the valve core structure being rotatably disposed in the valve cavity to communicate with different valve holes.

[0017] An embodiment of the above application has at least the following advantages or beneficial effects:

[0018] The valve core structure of this application includes a first channel and a second channel that are not interconnected. High-pressure refrigerant discharged from the compressor outlet enters through the first channel, undergoes heat exchange, and then flows back to the compressor inlet through the second channel, thus achieving refrigerant circulation. Because the flow area of ​​the first channel is smaller than that of the second channel, the minimum distance between the first and second channels increases while keeping the valve core structure dimensions unchanged. This weakens the thermal bridge effect between the first and second channels, thereby reducing heat transfer between them. Consequently, the heat loss of the high-pressure refrigerant discharged from the compressor outlet is reduced, lowering the compressor's workload and improving the efficiency of the air conditioning system. Attached Figure Description

[0019] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0020] Figure 1 This is a cross-sectional view of an embodiment of the valve core structure of the directional valve of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the first and second channels of the valve core structure;

[0022] Figure 3 yes Figure 1 Exploded view of the three-dimensional structure of the valve core;

[0023] Figure 4 This is a first-direction sectional view of an embodiment of the reversing valve of this application;

[0024] Figure 5 This is a first radial cross-sectional view of an embodiment of the reversing valve of this application.

[0025] The annotations in the attached figures are explained as follows:

[0026] 10. Valve core structure; 20. Directional control valve;

[0027] 110. First core; 111. First surface; 1111. First channel groove; 1112. Second channel groove; 120. Second core; 121. Second surface; 1211. Third channel groove; 1212. Fourth channel groove; 101. First channel; 1011. First entry section; 1011a. Third straight section; 1011b. First arc section; 1012. First straight section; 1013. First exit section; 1013a. Fourth straight section; 1013b. Second arc section; 102. Second channel; 1021. Second entry section; 1021a. Fifth straight section; 1021b. Third arc section; 1022. Second straight section; 1023. Second exit section; 1023a. Sixth straight section; 1023b. Fourth arc section; 130. Positioning structure; 131. Positioning hole; 132. Positioning post;

[0028] 210. Valve body; 201. Valve cavity; 202. Valve port; 202a. First valve port; 202b. Second valve port; 202c. Third valve port; 202d. Fourth valve port; 220. Sealing assembly; 230. Drive mechanism; 231. Motor coil; 232. Motor rotor; 240. Reduction mechanism; 241. Gear set; 242. Fixing plate;

[0029] D1, First direction; D2, First radial direction; D3, Second radial direction. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0031] The features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0032] In related technologies, the valve core structure of a reversing valve generally includes two channels that are not interconnected. During the operation of the air conditioning system, high-pressure refrigerant flows from the compressor outlet into one channel, undergoes heat exchange, and then flows back to the compressor through the other channel, thus achieving refrigerant circulation. However, since the valve core structure is generally made of metal, a thermal bridging effect occurs within the valve core structure. That is, between different temperature zones, due to the presence of materials or structures with high thermal conductivity, heat is abnormally or unexpectedly conducted through these "bridges." The thermal bridging effect intensifies heat transfer between the two channels, increases heat loss of the high-pressure refrigerant discharged from the compressor outlet, and reduces the efficiency of the vehicle's air conditioning system.

[0033] This application provides a valve core structure and a reversing valve, which improves the efficiency of the vehicle air conditioning system by weakening the thermal bridge effect between the two channels of the valve core structure.

[0034] The valve core structure and reversing valve of this application embodiment are described below with reference to the accompanying drawings. It should be noted that this application uses the application of the reversing valve in a vehicle's air conditioning system as an example to describe the function of the valve core structure and the reversing valve, but the application of the valve core structure and the reversing valve is not limited to this scenario.

[0035] like Figure 1 As shown, an embodiment of the valve core assembly of this application includes a first channel 101 and a second channel 102, which are not interconnected. The flow area of ​​the first channel 101 is smaller than that of the second channel 102 to increase the minimum distance between the first channel 101 and the second channel 102.

[0036] The valve core structure 10 of this embodiment includes a first channel 101 and a second channel 102 that are not interconnected. High-pressure refrigerant discharged from the compressor outlet enters through the first channel 101, undergoes heat exchange, and then flows back to the compressor inlet through the second channel 102, thus achieving refrigerant circulation. Since the flow area of ​​the first channel 101 is smaller than that of the second channel 102, the minimum distance between the first channel 101 and the second channel 102 increases while the dimensions of the valve core structure 10 remain unchanged. This weakens the thermal bridge effect between the first channel 101 and the second channel 102, thereby reducing heat transfer between them. The heat loss of the high-pressure refrigerant discharged from the compressor outlet is reduced, lowering the compressor's workload and improving the efficiency of the air conditioning system.

[0037] It should be noted that the efficiency of an air conditioning system is usually measured by the Energy Efficiency Ratio (EER) or the Coefficient of Performance (COP). It represents the cooling (or heating) capacity the system can provide per unit of energy consumption. Higher efficiency means a more energy-efficient system; therefore, improving the efficiency of a vehicle's air conditioning system helps reduce the overall energy consumption of the vehicle.

[0038] Specifically, in one embodiment, the inlet end of the first channel 101 can be used to connect to the compressor outlet, and the outlet end of the first channel 101 can be used to connect to the external heat exchanger. The outlet end of the second channel 102 can be used to connect to the compressor inlet end, and the inlet end of the second channel 102 can be used to connect to the internal heat exchanger.

[0039] When the vehicle's air conditioning system is in cooling mode, the high-pressure refrigerant discharged from the compressor outlet enters through the first channel 101, exchanges heat sequentially in the external heat exchanger and the internal heat exchanger, and then flows back to the compressor inlet through the second channel 102, entering the compressor to complete the refrigerant circulation. When the vehicle's air conditioning system is in heating mode, the high-pressure refrigerant discharged from the compressor enters through the first channel 101, exchanges heat sequentially in the internal heat exchanger and the external heat exchanger, and then flows back to the compressor inlet through the second channel 102, entering the compressor to complete the refrigerant circulation.

[0040] like Figure 2 As shown, in one embodiment, the minimum distance between the first channel 101 and the second channel 102 is H1, and the diameter of the first channel 101 is H2.

[0041] Understandably, if the minimum distance H1 between the first channel 101 and the second channel 102 is too small, it will exacerbate the thermal bridging effect between them, leading to a decrease in the efficiency of the air conditioning system. If the minimum distance H1 between the first channel 101 and the second channel 102 is too large, it will compress the flow area between them, affecting the refrigerant flow and also reducing the energy efficiency of the air conditioning system. Therefore, the flow area of ​​the first channel 101 can be appropriately reduced, for example, by reducing the diameter H2 of the first channel 101. This increases the minimum distance H1 between the first channel 101 and the second channel 102 while ensuring the refrigerant flow, thereby minimizing heat transfer between them.

[0042] It should be noted that since the first channel 101 is connected to the compressor outlet, the flow area of ​​the first channel 101 can be consistent with the flow area of ​​the compressor outlet. For example, the diameter of the first channel 101 can be set to the same inner diameter as the compressor outlet to reduce the pressure loss of the high-pressure refrigerant.

[0043] It should also be noted that the flow area of ​​the second channel 102 can be consistent with the flow area of ​​the compressor inlet. Furthermore, the diameter of the second channel 102 can be the same as the inner diameter of the compressor inlet to further reduce refrigerant pressure loss.

[0044] like Figure 2 As shown, in one embodiment, the first channel 101 includes an inlet end and an outlet end. The flow area of ​​the first channel 101 remains consistent in the direction from the inlet end to the outlet end; that is, the first channel 101 is a flow channel with a constant flow area. Increasing or decreasing the flow area will generate local resistance and increase pressure drop. A channel with a constant flow area can reduce the pressure loss of the refrigerant and ensure the stability of the refrigerant flow rate.

[0045] Accordingly, the second channel 102 includes an inlet end and an outlet end, and the flow area of ​​the second channel 102 remains consistent in the direction from the inlet end to the outlet end.

[0046] like Figure 2 As shown, in one embodiment, the first channel 101 includes a first inlet section 1011, a first straight section 1012, and a first outlet section 1013 connected in sequence; the second channel 102 includes a second inlet section 1021, a second straight section 1022, and a second outlet section 1023 connected in sequence; the first straight section 1012 and the second straight section 1022 are located on both sides of the center point of the valve core structure 10, and the distance between the first straight section 1012 and the second straight section 1022 is the minimum distance between the first channel 101 and the second channel 102.

[0047] Understandably, if the overall extension paths of the first channel 101 and the second channel 102 are respectively set as arcs, the size of the valve core structure 10 will inevitably increase in order to ensure the flow area of ​​the first channel 101 and the second channel 102 and the minimum distance H1 between the first channel 101 and the second channel 102. Increasing the size of the valve core structure 10 will lead to an increase in the opening torque of the directional valve 20, reducing the opening capacity of the directional valve 20, and thus reducing the operational reliability of the directional valve 20. Therefore, by adding straight sections to the first channel 101 and the second channel 102 respectively, the size of the valve core structure 10 can be maintained while reducing the thermal bridge effect between the first channel 101 and the second channel 102, thereby ensuring the operational reliability of the directional valve 20.

[0048] Furthermore, such as Figure 2 As shown, in one embodiment, the first inlet section 1011 includes a third straight section 1011a and a first arc section 1011b. The third straight section 1011a is connected to the outer wall of the valve core structure 10, and the first arc section 1011b connects the third straight section 1011a and the first straight section 1012. The first outlet section 1013 includes a fourth straight section 1013a and a second arc section 1013b. The fourth straight section 1013a is connected to the outer wall of the valve core structure 10, and the second arc section 1013b connects the first straight section 1012 and the fourth straight section 1013a.

[0049] After the refrigerant flows out of the compressor outlet, it passes through the third straight section 1011a and the first arc section 1011b into the first straight section 1012, then through the second arc section 1013b, and finally flows out of the valve core structure 10 from the fourth straight section 1013a. The first arc section 1011b and the second arc section 1013b enable a smooth transition between the two straight sections, allowing the refrigerant to smoothly change direction. This ensures that the refrigerant maintains a stable flow rate within the first channel 101 and helps reduce refrigerant pressure loss.

[0050] Accordingly, the second inlet section 1021 includes a fifth straight section 1021a and a third arc section 1021b. The fifth straight section 1021a is connected to the outer wall of the valve core structure 10, and the third arc section 1021b connects the fifth straight section 1021a with the second straight section 1022. The second outlet section 1023 includes a sixth straight section 1023a and a fourth arc section 1023b. The sixth straight section 1023a is connected to the outer wall of the valve core structure 10, and the fourth arc section 1023b connects the second straight section 1022 with the sixth straight section 1023a.

[0051] After heat exchange, the refrigerant enters the fifth straight section 1021a, passes through the third arc section 1021b, enters the second straight section 1022, then passes through the fourth arc section 1023b, and finally flows out of the valve core structure 10 from the sixth straight section 1023a, returning to the compressor inlet. The third arc section 1021b and the fourth arc section 1023b enable a smooth transition between the two straight sections, thus allowing the refrigerant to maintain a stable flow rate within the second channel 102 and helping to reduce pressure loss of the refrigerant within the second channel 102.

[0052] like Figure 2As shown, in one embodiment, the third straight segment 1011a and the sixth straight segment 1023a are coaxially arranged. For example, the third straight segment 1011a and the sixth straight segment 1023a are coaxially arranged along a first radial direction D2; the fourth straight segment 1013a and the fifth straight segment 1021a are coaxially arranged. For example, the fourth straight segment 1013a and the fifth straight segment 1021a are coaxially arranged along a second radial direction D3, wherein the axis of the third straight segment 1011a is perpendicular to the axis of the fourth straight segment 1013a. In the above structure, the third straight segment 1011a can be used to connect to the compressor outlet, the fifth straight segment 1021a can be used to connect to the external heat exchanger, the fourth straight segment 1013a can be used to connect to the internal heat exchanger, and the sixth straight segment 1023a can be used to connect to the compressor inlet. This arrangement makes the valve core structure 10 compact, which is beneficial for optimizing the layout of the vehicle air conditioning system.

[0053] like Figure 3 As shown, in one embodiment, the valve core structure 10 includes a first core 110 and a second core 120. The first core 110 has a first surface 111 that abuts against the second core 120, and the second core 120 has a second surface 121 that abuts against the first core 110. A first channel groove 1111 and a second channel groove 1112 are formed on the first surface 111. A third channel groove 1211 and a fourth channel groove 1212 are formed on the second surface 121. The first channel groove 1111 and the third channel groove 1211 form a first channel 101. The second channel groove 1112 and the fourth channel groove 1212 form a second channel 102.

[0054] This configuration facilitates the processing of the first channel 101 and the second channel 102, ensuring that both the first channel 101 and the second channel 102 achieve consistent flow area and smooth transition, thereby guaranteeing stable flow rate and low pressure loss when the refrigerant flows.

[0055] like Figure 3 As shown, in one embodiment, a positioning structure 130 is provided between the first surface 111 and the second surface 121, and the first core 110 and the second core 120 are connected by the positioning structure 130. Multiple positioning structures 130 are included, and each positioning structure 130 is equidistant from the center line of the valve core structure 10. Through the connection of multiple positioning structures 130, the first core 110 and the second core 120 can achieve pre-positioning before welding, preventing misalignment of the channel grooves during docking, thereby ensuring the smoothness of the first channel 101 and the second channel 102.

[0056] For example, such as Figure 3As shown, the positioning structure 130 may include a positioning hole 131 and a positioning post 132, which can be inserted into each other. One of the positioning hole 131 and the positioning post 132 may be located in the first core 110, and the other may be located in the second core 120.

[0057] For example, the positioning structure 130 can be set to 2 to 4, and the multiple positioning structures 130 are evenly spaced along the circumferential direction of the valve core structure 10, and are equidistant from the center line of the valve core structure 10.

[0058] Furthermore, the first core 110 and the second core 120 can be connected by welding. For example, solder paste can be applied to the first surface 111 and the second surface 121, and the first core 110 and the second core 120 can be connected as a single unit by brazing.

[0059] like Figure 4 and Figure 5 As shown, this application also provides a reversing valve 20. An embodiment of the reversing valve 20 includes a valve body 210 and a valve core structure 10. The valve body 210 has a valve cavity 201 and a plurality of valve holes 202 communicating with the valve cavity 201. The valve core structure 10 is rotatably disposed in the valve cavity 201 to communicate with different valve holes 202.

[0060] Specifically, the valve body 210 is provided with a first valve hole 202a, a second valve hole 202b, a third valve hole 202c, and a fourth valve hole 202d.

[0061] In the vehicle's air conditioning system, the compressor outlet, the first valve port 202a, the first channel 101, the second valve port 202b, and the external heat exchanger are connected in sequence; the compressor inlet, the third valve port 202c, the second channel 102, the fourth valve port 202d, and the internal heat exchanger are connected in sequence.

[0062] When the vehicle's air conditioning system is in cooling mode, the high-pressure refrigerant discharged from the compressor outlet enters the first channel 101 through the first valve port 202a on the reversing valve 20, then flows out through the second valve port 202b and undergoes heat exchange in the external heat exchanger and the internal heat exchanger in sequence. After flowing out of the reversing valve 20 through the fourth valve port 202d, the second channel 102, and the third valve port 202c in sequence, it enters the compressor through the compressor inlet, thus realizing refrigerant circulation.

[0063] When the vehicle air conditioning system is in heating mode, the high-pressure refrigerant discharged from the compressor outlet enters the second channel 102 through the first valve hole 202a on the reversing valve 20, then flows out through the fourth valve hole 202d and undergoes heat exchange in the in-vehicle heat exchanger and the out-of-vehicle heat exchanger in sequence. After flowing out of the reversing valve 20 through the second valve hole 202b, the first channel 101, and the third valve hole 202c in sequence, it enters the compressor through the compressor inlet, thus realizing refrigerant circulation.

[0064] like Figure 4 As shown, the reversing valve 20 also includes a drive mechanism 230, which includes a motor coil 231 and a motor rotor 232 that magnetically engages with the motor coil 231. The motor coil 231 is detachably sleeved outside the valve body 210, and the motor rotor 232 is installed inside the valve body 210 and can rotate under the drive of the motor coil 231.

[0065] To enhance the rotational driving force of the drive mechanism 230 on the valve core structure 10, in one embodiment, the directional valve 20 further includes a reduction mechanism 240. The drive mechanism 230 drives the valve core structure 10 to rotate through the reduction mechanism 240, thereby improving the stability of the drive on the valve core structure 10.

[0066] Specifically, such as Figure 4 As shown, the reduction mechanism 240 includes a gear set 241 and a fixed plate 242. Both the gear set 241 and the fixed plate 242 are located within the valve cavity 201, and the gear set 241 is connected to the fixed plate 242 and detachably connected to the valve body 210 via the fixed plate 242. The valve core structure 10 is mounted on the end of the fixed plate 242 opposite to the gear set 241 and can rotate around its own axis in response to the drive of the gear set 241. That is, the reduction mechanism 240 is detachably connected to the valve body 210, facilitating the disassembly and installation of the reduction mechanism 240 as a whole, thereby allowing for adjustment of the reduction ratio of the reduction mechanism 240 according to actual needs.

[0067] The rotation of the valve core structure 10 is achieved through the drive mechanism 230 and the reduction mechanism 240. Specifically, the motor coil 231 is energized to drive the motor rotor 232 to rotate. At this time, the output shaft of the motor rotor 232 can drive the gear set 241 to rotate, thereby driving the valve core structure 10 to rotate accordingly, thus realizing the switching of the flow path.

[0068] In this embodiment, since the flow area of ​​the first channel is smaller than that of the second channel and is the same as that of the compressor outlet, the first channel must be connected to the compressor outlet and the second channel must be connected to the compressor inlet, regardless of whether the vehicle air conditioning system is in cooling or heating mode, so as to reduce the pressure loss of the refrigerant.

[0069] Furthermore, referring to Figure 5The valve port positions shown are defined as the initial positions of valve core structure 10 when the vehicle air conditioning system is in cooling mode. At this time, the compressor outlet, first valve port 202a, first channel 101, second valve port 202b, and external heat exchanger are connected in sequence; the compressor inlet, third valve port 202c, second channel 102, fourth valve port 202d, and internal heat exchanger are connected in sequence.

[0070] When the vehicle's air conditioning system is in cooling mode, the high-pressure refrigerant discharged from the compressor outlet enters the first channel 101 through the first valve port 202a on the reversing valve 20, then flows out through the second valve port 202b and undergoes heat exchange in the external heat exchanger and the internal heat exchanger in sequence. After flowing out of the reversing valve 20 through the fourth valve port 202d, the second channel 102, and the third valve port 202c in sequence, it enters the compressor through the compressor inlet, thus realizing refrigerant circulation.

[0071] When the vehicle's air conditioning system switches to heating mode, to ensure that the compressor outlet remains connected to the first channel, the valve core structure 10 can be rotated 90° counterclockwise via the drive mechanism 230 and the reduction mechanism 240, thus switching the flow path. When the vehicle's air conditioning system switches back to cooling mode, the drive mechanism 230 and the reduction mechanism 240 control the valve core structure 10 to rotate 90° clockwise, thus returning the valve core structure 10 to its initial position.

[0072] Furthermore, a sealing assembly 220 is also provided inside the valve core. The sealing assembly 220 is disposed within the valve hole 202 and movably seals against the outer wall of the valve core structure 10 to achieve a seal at the connection between the valve hole 202 and the valve core structure 10. This ensures that the refrigerant flows along a predetermined flow path between the valve hole 202 and the valve core structure 10, thereby greatly improving the reliability of the reversing valve 20. The specific structure of the sealing assembly 220 is prior art and will not be described in detail here.

[0073] It should be noted that the diameter of the flow hole of the sealing component 220 in the first valve hole 202a can be the same as the inner diameter of the first channel 101, so as to further reduce the pressure loss of the refrigerant.

[0074] Finally, it should be noted that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described in detail here.

[0075] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0076] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0077] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A spool structure of a reversing valve, characterized by comprising: The valve core structure is provided with a first channel and a second channel that are not interconnected. The flow area of ​​the first channel is smaller than that of the second channel to increase the minimum distance between the first channel and the second channel.

2. The spool structure of a reversing valve according to claim 1, characterized by The first channel includes an inlet and an outlet, and the flow area of ​​the first channel remains consistent in the direction from the inlet to the outlet. And / or, the second channel includes an inlet end and an outlet end, and the flow area of ​​the second channel remains consistent in the direction from the inlet end to the outlet end.

3. The spool structure of a reversing valve according to claim 1, characterized by The inlet end of the first channel is used to connect to the compressor outlet; the outlet end of the second channel is used to connect to the compressor inlet.

4. The spool structure of a reversing valve according to claim 3, characterized by The diameter of the first channel is the same as the diameter of the compressor outlet. And / or, the diameter of the second channel is the same as the diameter of the compressor inlet.

5. The spool structure of a reversing valve according to any one of claims 1 to 4, characterized in that, The first channel includes a first inlet section, a first straight section, and a first outlet section connected in sequence; the second channel includes a second inlet section, a second straight section, and a second outlet section connected in sequence; the first straight section and the second straight section are located on both sides of the center point of the valve core structure, and the distance between the first straight section and the second straight section is the minimum distance between the first channel and the second channel.

6. The spool structure of a reversing valve according to claim 5, characterized by The first entry section includes a third straight section and a first arc section. The third straight section is connected to the outer wall of the valve core structure, and the first arc section connects the third straight section and the first straight section. The first outflow section includes a fourth straight section and a second arc section. The fourth straight section is connected to the outer wall of the valve core structure, and the second arc section connects the first straight section and the fourth straight section. The second entry section includes a fifth straight section and a third arc section. The fifth straight section is connected to the outer wall of the valve core structure, and the third arc section connects the fifth straight section and the second straight section. The second outflow section includes a sixth straight section and a fourth arc section. The sixth straight section is connected to the outer wall of the valve core structure, and the fourth arc section connects the second straight section and the sixth straight section.

7. The spool structure of a reversing valve according to claim 6, characterized by The third straight segment is coaxial with the sixth straight segment; the fourth straight segment and the fifth straight segment are coaxial; wherein the axis of the third straight segment is perpendicular to the axis of the fourth straight segment.

8. The spool structure of a reversing valve according to any one of claims 1 to 4, characterized in that, The valve core structure includes a first core and a second core, wherein the first core has a first surface that abuts against the second core, and the second core has a second surface that abuts against the first core; The first surface has a first channel groove and a second channel groove; the second surface has a third channel groove and a fourth channel groove; the first channel groove and the third channel groove form the first channel; the second channel groove and the fourth channel groove form the second channel.

9. The spool structure of a reversing valve according to claim 8, characterized by A positioning structure is provided between the first surface and the second surface, and the first core and the second core are connected by the positioning structure; the positioning structure includes multiple structures, and each positioning structure is equidistant from the center line of the valve core structure; And / or, the first surface and the second surface are connected by welding.

10. A reversing valve characterized by include: Valve body; A valve core structure, wherein the valve core structure is the valve core structure according to any one of claims 1 to 9; The valve body has a valve cavity and a plurality of valve holes communicating with the valve cavity, and the valve core structure is rotatably disposed in the valve cavity to communicate with different valve holes.

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