Thermal expansion valve

Abstract

The utility model discloses a thermostatic expansion valve which is characterized in that the thermostatic expansion valve comprises a valve body and a valve element assembly, and the valve body is provided with a first channel and a second channel; the valve element assembly comprises a flow channel piece, the flow channel piece is provided with a flow channel, the flow channel piece can move relative to the valve body, opening and closing of a refrigerant channel can be achieved by arranging the flow channel piece, and therefore the number of parts is reduced, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fluid control, specifically to a thermostatic expansion valve. Background Technology

[0002] The expansion valve is an important component of automotive air conditioning, which controls the flow of refrigerant and reduces pressure. Existing expansion valves control the opening and closing of the refrigerant passage by setting a valve core holder and a ball-shaped valve core. They generally include a damping spring, valve core, and valve core holder, resulting in a large number of parts, a complex structure, and thus a higher cost. Utility Model Content

[0003] The purpose of this invention is to provide a novel thermostatic expansion valve that can reduce costs.

[0004] This utility model provides a thermostatic expansion valve, characterized in that it includes a valve body and a valve core assembly, the valve body having a first channel and a second channel; the valve core assembly includes a flow channel component, the flow channel component having a flow channel, and the flow channel component being movable relative to the valve body.

[0005] According to the thermostatic expansion valve provided in this embodiment of the present invention, the opening and closing of the refrigerant passage can be controlled by setting a flow channel component, thereby reducing the number of parts and lowering the cost. Attached Figure Description

[0006] Figure 1 This is a cross-sectional schematic diagram of the thermal expansion valve provided by this utility model;

[0007] Figure 2 This is a cross-sectional schematic diagram of the valve body provided by this utility model;

[0008] Figure 3 This is a cross-sectional schematic diagram of the valve core assembly provided in Embodiment 1 of this utility model;

[0009] Figure 4 This is a cross-sectional schematic diagram of the flow channel component provided in Embodiment 1 of this utility model;

[0010] Figure 5 This is a schematic diagram of the flow channel component provided in Embodiment 1 of this utility model;

[0011] Figure 6 This is a schematic diagram of another side of the flow channel component provided in Embodiment 1 of this utility model;

[0012] Figure 7 This is a structural schematic diagram of the fastener provided in Embodiment 1 of this utility model;

[0013] Figure 8 This is a cross-sectional schematic diagram of the flow channel component provided in Embodiment 1 of this utility model;

[0014] Figure 9 This is a cross-sectional schematic diagram of the valve core assembly provided in Embodiment 2 of this utility model;

[0015] Figure 10 This is a structural schematic diagram of the fastener provided in Embodiment 3 of this utility model;

[0016] Figure 11 This is a schematic diagram of the flow channel component provided in Embodiment 3 of this utility model;

[0017] Figure 12 This is a cross-sectional schematic diagram of the valve core assembly provided in Embodiment 3 of this utility model;

[0018] Figure 13 This is a structural schematic diagram of the fastener provided in Embodiment 4 of this utility model;

[0019] Figure 14 This is a schematic diagram of the flow channel component provided in Embodiment 4 of this utility model;

[0020] Figure 15 This is a cross-sectional schematic diagram of another valve body provided by this utility model;

[0021] Figure 16 This is a cross-sectional schematic diagram of another valve core assembly provided by this utility model.

[0022] 1. Valve body; 11. First channel; 12. Second channel; 13. Valve chamber; 131. Void relief groove; 14. First channel section; 15. Second channel section; 16. First connecting port; 17. Second connecting port; 18. Third channel; 19. Fourth channel; 2. Valve core assembly; 21. Fixing member; 211. First opening; 212. Second opening; 213. Receiving cavity; 214. First mounting groove; 215. Second mounting groove; 216. First abutment surface; 217. 22. Flow channel component; 221. First flow channel opening; 222. Second flow channel opening; 223. Flow channel; 2231. First flow channel section; 2232. Second flow channel section; 2233. Third flow channel section; 224. Second abutment surface; 23. First sealing ring; 24. Second sealing ring; 3. Adjustment assembly; 31. Adjustment seat; 32. Adjustment spring; 4. Air box head; 41. Air box cover; 42. Air box seat; 43. Diaphragm; 44. Transmission block; 45. Valve stem. Detailed Implementation

[0023] The features and exemplary embodiments of various aspects of this utility model will now be described. To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0024] Example 1, please refer to Figures 1 to 2 The thermal expansion valve includes a valve body 1, a valve core assembly 2, an adjustment assembly 3, and an air box head 4.

[0025] A first channel portion 14 and a second channel portion 15 are provided on one side of the valve body 1. The inner wall of the first channel portion 14 forms a first channel 11, and the inner wall of the second channel portion 15 forms a second channel 12. A valve chamber 13 is also provided on the valve body 1. The first channel 11 can communicate with the second channel 12 through the valve chamber 13. Specifically, the valve chamber 13 can be located between the first channel 11 and the second channel 12. The first channel portion 14 has a first connecting port 16, which can extend along the width direction of the valve body 1. The first channel 11 and the valve chamber 13 are connected through the first connecting port 16. A second connecting port 17 is provided on the side wall of the second channel portion 15, which can extend along the width direction of the valve body 1. The second channel 12 and the valve chamber 13 can be connected through the second connecting port 17. The axial direction of the valve body 1 can be parallel to or coaxial with the length direction of the valve body 1.

[0026] Both the valve core assembly 2 and the adjusting assembly 3 are disposed within the valve chamber 13. The adjusting assembly 3 includes an adjusting seat 31 and an adjusting spring 32. The adjusting seat 31 is threadedly connected to the inner wall of the valve chamber 13. One end of the adjusting spring 32 abuts against the adjusting seat 31, and the other end abuts against the valve core assembly 2. The adjusting seat 31 is sealed to the valve body 1.

[0027] The valve body 1 has a third channel and a fourth channel on the other side. The inner wall of the third channel is surrounded by a third channel 18, and the inner wall of the fourth channel is surrounded by a fourth channel 19. The third channel 18 and the fourth channel 19 are connected.

[0028] The gas box head 4 is fixed to the side of the valve body 1 where the third channel 18 and the fourth channel 19 are located. Specifically, the gas box head 4 includes a gas box cover 41, a gas box seat 42, a diaphragm 43, a transmission block 44, and a valve stem 45. The gas box seat 42 is fixed to the valve body 1, and the gas box cover 41 and the gas box seat 42 are fixed together, which can be done by welding. The diaphragm 43 is located between the gas box cover 41 and the gas box seat 42, dividing the space between the gas box cover 41 and the gas box seat 42 into a closed chamber and a pressure equalization chamber. The closed chamber is located on the upper side of the diaphragm 43, and the pressure equalization chamber is located on the lower side of the diaphragm 43. The closed chamber is filled with refrigerant gas. The gas box seat 42 has a through hole, through which the pressure equalization chamber communicates with the third channel 18 and the fourth channel 19. The transmission block 44 is located below the diaphragm 43, and the diaphragm 43 can apply force to the transmission block 44. One end of the valve stem 45 abuts against the transmission block 44, and the other end abuts against the valve core assembly 2. The air box head 4 and the regulating component 3 work together on the valve core assembly 2 to connect or disconnect the refrigerant passage.

[0029] The first channel 11 can be connected to the outlet of the condenser, the second channel 12 can be connected to the inlet of the evaporator, the third channel 18 can be connected to the outlet of the evaporator, and the fourth channel 19 can be connected to the inlet of the compressor. Therefore, the specific working principle of the thermostatic expansion valve is as follows: the refrigerant flows out of the outlet of the condenser, through the first channel 11, the valve core assembly 2, and the second channel 12 into the evaporator, where it undergoes heat exchange. After heat exchange, part of the refrigerant directly enters the compressor through the third channel 18 and the fourth channel 19, while the other part of the refrigerant enters the equalizing chamber through the third channel 18. The refrigerant gas in the sealed chamber drives the diaphragm 43 to move, and the diaphragm 43 drives the valve core assembly 2 to move through the transmission block 44 and the valve stem 45, thereby controlling the refrigerant flow rate.

[0030] Please see Figures 3 to 8 The valve core assembly 2 includes a fixing member 21, a flow channel member 22, a first sealing ring 23, and a second sealing ring 24.

[0031] The flow channel component 22 has a flow channel 223 and can move relative to the valve body 1 so that the flow channel 223 connects the first channel 11 and the second channel 12. In other words, the flow channel component 22 can connect the first channel 11 and the second channel 12, reducing the number of thermal expansion valve components, simplifying the structure, and thus reducing costs.

[0032] The fixing member 21 is fixedly disposed within the valve chamber 13. The fixing method between the fixing member 21 and the inner wall of the valve chamber 13 can be an interference fit. The interference fit restricts the rotation of the fixing member 21 relative to the valve chamber 13 and also allows the outer surface of the fixing member 21 to tightly abut against the inner wall of the valve chamber 13, thereby reducing the flow of refrigerant overflowing from the gap between the outer surface of the fixing member 21 and the inner wall of the valve chamber 13. It is conceivable that in other embodiments, the fixing member 21 can also be fixed within the valve chamber 13 by riveting or other methods.

[0033] The fixing member 21 has a first opening 211 and a second opening 212. The first opening 211 communicates with the first channel 11, and the second opening 212 communicates with the second channel 12. The flow channel member 22 is relatively movable to the fixing member 21, thereby enabling the flow channel 223 to connect the first opening 211 and the second opening 212. "Connection" means that refrigerant can flow from the first opening 211 into the second opening 212. "Disconnection" means that refrigerant cannot flow from the first opening 211 into the second opening 212, or that refrigerant below a preset flow rate can flow from the first opening 211 into the second opening 212. The preset flow rate can be set according to user requirements.

[0034] The interior of the fixing member 21 is hollow, forming a receiving cavity 213, which can communicate with both the first opening 211 and the second opening 212. At least a portion of the flow channel member 22 is located within the receiving cavity 213, and the flow channel member 22 can move along the axial direction of the fixing member 21, thereby enabling the flow channel 223 to connect the first opening 211 and the second opening 212.

[0035] The valve stem 45 abuts against the top surface of the flow channel component 22, and the adjusting spring 32 abuts against the bottom surface of the flow channel component 22. Therefore, the air box head 4 and the adjusting assembly 3 work together on the flow channel component 22 so that the flow channel component 22 can move axially along the fixing member 21.

[0036] In this embodiment, at least a portion of the wall surface of the valve chamber 13 is cylindrical, and correspondingly, the shape of the fixing member 21 is also cylindrical. In this case, the extension direction of the central axis of the fixing member 21 is the axial direction of the fixing member 21. The shape of the receiving cavity 213 is approximately cylindrical, and correspondingly, the shape of the flow channel member 22 is also approximately cylindrical. Of course, in other embodiments, the shapes of the valve chamber 13, fixing member 21, receiving cavity 213, and flow channel member 22 are not limited to the above situations. For example, the valve chamber 13, fixing member 21, receiving cavity 213, and flow channel member 22 can all be cuboid in shape.

[0037] It is conceivable that, due to the limitations of existing machining precision, if the flow channel component 22 is moved relative to the fixed component 21, a gap will be left between the outer side of the flow channel component 22 and the inner side wall of the fixed component 21, which will cause refrigerant leakage. However, as long as the amount of refrigerant leakage is within the standard range, it will not affect the normal operation of the expansion valve.

[0038] Furthermore, an installation groove can be provided on the outer side of the flow channel component 22 or the inner side wall of the fixing component 21. A sealing ring is provided in the installation groove, and the sealing ring abuts against the outer side of the flow channel component 22 and the inner side wall of the fixing component 21, thereby enhancing the sealing between the flow channel component 22 and the fixing component 21 and reducing or even eliminating refrigerant leakage.

[0039] The flow channel component 22 has a first flow channel opening 221 and a second flow channel opening 222, and a flow channel 223 connects the first flow channel opening 221 and the second flow channel opening 222. The first flow channel opening 221 corresponds to the first opening 211, and the second flow channel opening 222 corresponds to the second opening 212. The flow channel component 22 can be moved relative to the fixing component 21 to realize the connection or disconnection of the first opening 211 and the first flow channel opening 221, and the connection or disconnection of the second opening 212 and the second flow channel opening 222.

[0040] The specific shape of the flow channel 223 is not limited, but is preferably Z-shaped. Specifically, the flow channel 223 includes a first flow channel portion 2231 communicating with the first flow channel opening 221, a second flow channel portion 2232 communicating with the second flow channel opening 222, and a third flow channel portion 2233 communicating with the first flow channel portion 2231 and the second flow channel portion 2232. It should be understood that in this embodiment, the first flow channel opening 221 and the first opening 211 are normally connected to the first channel 11, and the second opening 212 is normally connected to the second channel 12. Therefore, in order to limit the refrigerant flow rate, the flow area of ​​the second flow channel portion 2232 needs to be smaller than the flow area of ​​the first flow channel portion 2231 and the third flow channel portion 2233, and the flow area of ​​the second flow channel portion 2232 can be the same as that of the second flow channel opening 222. Therefore, the flow area of ​​the second flow channel opening 222 and the second opening 212 actually controls the refrigerant flow rate. In addition, the flow area of ​​the first flow channel 2231 and the third flow channel 2233 is not limited. The flow area of ​​the first flow channel 2231 can be larger or smaller than the flow area of ​​the third flow channel 2233.

[0041] To facilitate smoother refrigerant flow and reduce noise during flow, an arc transition portion may be provided at the connection between the first flow channel 2231 and the third flow channel 2233, and / or an arc transition portion may be provided at the connection between the second flow channel 2232 and the third flow channel 2233.

[0042] The flow area refers to the cross-sectional area of ​​the flow channel 223 that allows refrigerant to flow perpendicular to the flow direction of the refrigerant.

[0043] In this embodiment, the flow area of ​​the first flow channel 2231, the flow area of ​​the second flow channel 2232, and the flow area of ​​the third flow channel 2233 are always the same along the refrigerant flow direction. It is conceivable that in other embodiments, the flow area of ​​the first flow channel 2231, the flow area of ​​the second flow channel 2232, and the flow area of ​​the third flow channel 2233 can vary along the refrigerant flow direction.

[0044] To prevent the flow channel component 22 from rotating within the receiving cavity 213, an anti-rotation structure is provided between the flow channel component 22 and the fixing component 21. The anti-rotation structure includes a first abutment surface 216 and a second abutment surface 224. The first abutment surface 216 is provided on the inner wall of the receiving cavity 213, and the second abutment surface 224 is provided on the outer side of the flow channel component 22. When the flow channel component 22 is installed in the receiving cavity 213, the first abutment surface 216 can abut against the second abutment surface 224, thereby preventing the flow channel component 22 from rotating.

[0045] It is conceivable that the anti-rotation structure is not limited to the above-described cases. For example, the anti-rotation structure can also be a rotation-limiting pin and a groove, which can extend along the length direction. The rotation-limiting pin is located on the inner wall surface of the fixing member 21, and the groove is located on the outer surface of the flow channel member 22; or the rotation-limiting pin is located on the outer surface of the flow channel member 22, and the groove is located on the inner wall surface of the fixing member 21. The rotation-limiting pin can be inserted into the groove to restrict the rotation of the flow channel member 22. In addition, the shape of the receiving cavity 213 can be cylindrical, which is easier to process and has higher precision. It should be noted that the setting of the rotation-limiting pin and the groove needs to avoid other structures on the fixing member 21 and the flow channel member 22.

[0046] The flow channel component 22 has a first position. When the flow channel component 22 is in the first position, the first opening 211 and the second opening 212 are connected. At this time, the first opening 211 is connected to the first flow channel port 221, and the second opening 212 is connected to the second flow channel port 222. The first flow channel port 221 is also connected to the second flow channel port 222 through the flow channel 223. Therefore, the first opening 211 and the second opening 212 can be connected through the first flow channel port 221, the flow channel 223, and the second flow channel port 222. It is worth noting that the connection here does not only refer to complete connection, but also partial connection. In general, as long as refrigerant is allowed to flow from the first opening 211 into the first flow channel port 221, it can be considered that the first opening 211 and the first flow channel port 221 are connected.

[0047] The flow channel component 22 has a second position. When the flow channel component 22 is in the second position, the first opening 211 and the second opening 212 are disconnected. There are three possibilities: First, the first opening 211 is axially offset from the first flow channel opening 221, and the second opening 212 is connected to the second flow channel opening 222; second, the first opening 211 is connected to the first flow channel opening 221, and the second opening 212 is axially offset from the second flow channel opening 222; third, the first opening 211 is axially offset from the first flow channel opening 221, and the second opening 212 is axially offset from the second flow channel opening 222. Here, axial offset means that along the axial direction of the fixing component 21, the first opening 211 and the first flow channel opening 221, and the second opening 212 and the second flow channel opening 222 are completely offset, meaning that refrigerant cannot flow from the first opening 211 into the first flow channel opening 221, and refrigerant cannot flow from the second flow channel opening 222 into the second opening 212.

[0048] After the fastener 21 is installed inside the valve chamber 13, its top surface can abut against the top wall surface of the valve chamber 13. To further enhance the sealing between the top surface of the fastener 21 and the top wall surface of the valve chamber 13, a first mounting groove 214 is provided on the top surface of the fastener 21, and a first sealing ring 23 is installed in the first mounting groove 214. When the fastener 21 is installed inside the valve chamber 13, the first sealing ring 23 can be tightly pressed against the top wall surface of the valve chamber 13 and the top surface of the fastener 21, thereby enhancing the sealing between the top wall surface of the valve chamber 13 and the top surface of the fastener 21.

[0049] It is conceivable that in this embodiment, the fastener 21 is fixed in the valve chamber 13 by an interference fit. During the installation process, the fastener 21 is inserted into the valve chamber 13 from bottom to top. At this time, the outer side of the fastener 21 will rub against the inner wall of the valve chamber 13, causing wear. However, in this embodiment, the first sealing ring 23 is set on the top surface of the fastener 21, which can avoid the first sealing ring 23 rubbing against the inner side of the valve chamber 13, thus achieving a better sealing effect.

[0050] Please see Figure 15 and Figure 16In addition to the above-mentioned technical solutions, an annular sealing part 217 can also be provided on the top surface of the fixing member 21. The outer diameter of the annular sealing part 217 is smaller than the outer diameter of the fixing member 21. The outer ring surface of the annular sealing part 217 is provided with a first mounting groove 214. The first sealing ring 23 is installed in the first mounting groove 214, and the first sealing ring 23 does not protrude from the outer side of the fixing member 21. Therefore, when the fixing member 21 is installed in the valve chamber 13, the first sealing ring 23 will not rub against the inner wall surface of the valve chamber 13, thereby avoiding wear of the first sealing ring 23. Correspondingly, a cylindrical clearance groove 131 is also provided on the top wall surface of the valve chamber 13. The diameter of the clearance groove 131 is smaller than the outer diameter of the fixing member 21, and the diameter of the clearance groove 131 can be slightly larger than the outer diameter of the annular sealing part 217. Therefore, the annular sealing part 217 can be inserted into the cavity groove 131, and the first sealing ring 23 abuts against the outer side of the annular sealing part 217 and the inner wall of the cavity groove 131, thereby achieving a better sealing effect.

[0051] To further enhance the sealing between the outer surface of the fastener 21 and the inner wall of the valve chamber 13, a second mounting groove 215 is provided on the outer surface of the fastener 21. The height of the second mounting groove 215 is located on the side of the first flow channel opening 221 opposite to the second flow channel opening 222. A second sealing ring 24 is installed in the second mounting groove 215. After the fastener 21 is installed in the valve chamber 13, the second sealing ring 24 can abut against the inner wall of the valve chamber 13 and the outer surface of the fastener 21, thereby enhancing the sealing between the outer surface of the fastener 21 and the inner wall of the valve chamber 13.

[0052] As can be seen, in this embodiment, the first channel 11, the first opening 211, the first flow channel 221, the flow channel 223, the second flow channel 222, the second opening 212, and the second channel 12 form a refrigerant flow path. The adjusting spring 32 is independently set with respect to this path, without intersecting with it, and is sealed and isolated from it. In contrast, existing thermostatic expansion valves using spherical valve cores, where the adjusting spring is placed within the refrigerant path, cause the refrigerant to impact the adjusting spring, resulting in noise. However, the thermostatic expansion valve provided in this embodiment, because the adjusting spring 32 and the refrigerant path are independently set, does not experience refrigerant impact on the adjusting spring 32, thus achieving better noise reduction. Furthermore, existing thermostatic expansion valves using spherical valve cores typically require a butterfly spring to enhance the stability of the valve core installation in order to prevent refrigerant impact from causing valve core tilting. However, the thermostatic expansion valve provided in this embodiment, because it does not experience refrigerant impact on the adjusting spring, also avoids tilting of the fixing component 21 and the flow channel component 22, resulting in superior overall stability.

[0053] Importantly, the thermostatic expansion valve provided by this invention allows for standardized production of the fixing component 21 and the flow channel component 22, and can be matched with the standard cooling tonnage of the thermostatic expansion valve, exhibiting good versatility. Furthermore, the cooling tonnage of the same thermostatic expansion valve can be changed simply by altering the area of ​​communication between the fixing component 21 and the flow channel component 22; that is, one expansion valve can have multiple cooling tonnages, resulting in better practicality. In contrast, existing thermostatic expansion valves using spherical valve cores require different diameter valve ports on the valve body 1 and matching valve cores of corresponding diameters to change the cooling tonnage, resulting in poor versatility. Moreover, a single thermostatic expansion valve can only have one cooling tonnage, further reducing its practicality.

[0054] Example 2, please refer to Figure 9 In this embodiment, the structure and shape of the fixing member 21 and the flow channel member 22 are different from those in Embodiment 1, while the rest of the structure is the same as or similar to that in Embodiment 1.

[0055] In the first scenario, where the height of the thermal expansion valve is not a concern, the height region of the second flow channel 222 is spaced apart from the height region of the first flow channel 221 along the height direction of the thermal expansion valve. This allows for a certain distance between the two flow channel regions, thus meeting the design requirements of the Z-shaped flow channel 223. Projecting perpendicular to the height of the thermal expansion valve, the projections of the first channel 11 and the second channel 12 are offset, meaning they do not overlap. The first channel 11 and the second channel 12 can be positioned at different heights in the valve body 1, allowing the thermal expansion valve to meet design requirements at different heights.

[0056] In the second scenario, to minimize the height and size of the expansion valve, the height region of the second flow channel 222 at least partially overlaps with the height region of the first flow channel 221 along the height direction of the thermal expansion valve. That is, at least a portion of the second flow channel 222 and the first flow channel 221 can be located at the same height as the flow channel component 22. Therefore, the height of the flow channel component 22 can be relatively reduced. In this case, the shape of the flow channel 223 is close to a straight line, or at least a portion of the flow channel 223 is a straight line penetrating the flow channel component 22. Projecting along a direction perpendicular to the height of the thermal expansion valve, the projection of the first channel 11 and the projection of the second channel 12 at least partially overlap. That is, at least a portion of the second flow channel 222 and the first flow channel 221 can be located at the same height as the valve body 1. Therefore, the height of the valve body 1 can be relatively reduced.

[0057] Since the openings of the first channel 11 and the second channel 12 near the outer side of the valve body 1 can be designed according to actual conditions and their size can be adjusted, in this embodiment, the first channel 11 and the second channel 12 specifically refer to the part of the channel near the first flow channel 221 and the second flow channel 222.

[0058] Example 3, please refer to Figures 10 to 12 In this embodiment, the structure and shape of the fixing member 21 and the flow channel member 22 are different from those in Embodiment 1, while the remaining structures are the same as or similar to those in Embodiment 1. Furthermore, in this utility model, "multiple" refers to two or more.

[0059] Specifically, a first opening 211 can be provided on the fixing member 21, and a first flow channel opening 221 can be provided on the flow channel member 22. The flow channel member 22 can be moved to connect or disconnect the first opening 211 and the first flow channel opening 221; or, multiple first openings 211 can be provided on the fixing member 21, with each first opening 211 spaced apart along the axial direction of the fixing member 21, and multiple first flow channel openings 221 can be provided on the flow channel member 22, with each first flow channel opening 221 spaced apart along the axial direction of the flow channel member 22. The flow channel member 22 can be moved to connect or disconnect each first opening 211 and each first flow channel opening 221 in a one-to-one correspondence. A second opening 212 may be provided on the fixing member 21, and a second flow channel opening 222 may be provided on the flow channel member 22. The flow channel member 22 may be moved to connect or disconnect the second opening 212 and the second flow channel opening 222. Alternatively, multiple second openings 212 may be provided on the fixing member 21, with each second opening 212 spaced apart along the axial direction of the fixing member 21. Multiple second flow channel openings 222 may be provided on the flow channel member 22, with each second flow channel opening 222 spaced apart along the axial direction of the flow channel member 22. The flow channel member 22 may be moved to connect or disconnect each second opening 212 and each second flow channel opening 222 in a one-to-one correspondence.

[0060] It is conceivable that different numbers of first openings 211 and first flow channel openings 221 can correspond to different numbers of second openings 212 and second flow channel openings 222. For example, when there is only one first opening 211 and one first flow channel opening 221, the number of second openings 212 and second flow channel openings 222 can be one or more; as another example, when there are multiple first openings 211 and first flow channel openings 221, the number of second openings 212 and second flow channel openings 222 can be one or more.

[0061] Furthermore, the number of first openings 211 and first flow channels 221 can be different. For example, there can be one first opening 211 and multiple first flow channels 221. In this case, "disconnected" means that one first opening 211 can be disconnected from multiple first flow channels 221. "Connected" means that one first opening 211 can be connected to one of the first flow channels 221, or one first opening 211 can be connected to multiple first flow channels 221 simultaneously. As another example, there can be multiple first openings 211 and one first flow channel 221, which will not be elaborated further here.

[0062] Similarly, the number of the second opening 212 and the second flow channel opening 222 can also be different. The specific number and connection method can be referred to the number and connection method of the first opening 211 and the first flow channel opening 221 mentioned above, and will not be repeated here.

[0063] It is conceivable that Embodiment 3 can be combined with Embodiment 1 or Embodiment 2.

[0064] Example 4, please refer to Figures 13 to 14 The first opening 211, the second opening 212, the first flow channel opening 221, and the second flow channel opening 222 are rectangular, elliptical, or triangular. Of course, in order to meet different design requirements, the first opening 211, the second opening 212, the first flow channel opening 221, and the second flow channel opening 222 can also be other shapes.

[0065] Since the present invention normally connects the first opening 211 and the first flow channel 221, and controls the connection or disconnection of the refrigerant through the second opening 212 and the second flow channel 222, the second opening 212 and the second flow channel 222 will be used as examples for the description.

[0066] When both the second opening 212 and the second flow channel 222 are rectangular, as the flow channel component 22 moves, the second flow channel 222 and the second opening 212 go from being completely disconnected to being completely connected. During this process, the flow rate of the refrigerant increases in a regular linear manner.

[0067] When both the second opening 212 and the second flow channel opening 222 are triangular, as the flow channel component 22 moves, the second flow channel opening 222 and the second opening 212 go from being completely disconnected to being completely connected. During this process, the flow rate of the refrigerant shows a curved upward trend.

[0068] Furthermore, one of the second opening 212 and the second flow channel opening 222 may be triangular and the other may be rectangular; or one may be elliptical and the other may be triangular or rectangular. In general, the specific shapes of the second opening 212 and the second flow channel opening 222 are not limited, as long as they can accommodate different refrigerant flow rates.

[0069] It is conceivable that Embodiment 4 can be combined with at least one or more of Embodiments 1, 2, and 3.

[0070] When Embodiment 4 is combined with Embodiment 3, the following explanation is based on the example of having multiple first openings 211. The shapes of the multiple first openings 211 can be the same or different. For example, all the multiple first openings 211 can be rectangular, triangular, or elliptical. Or, for example, some of the first openings 211 can be rectangular, while others can be triangular. Similarly, when there are multiple second openings 212, first flow channel openings 221, and second flow channel openings 222, their shapes can be the same or different, which will not be elaborated further here.

[0071] It should be noted that the above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. For example, the directional definitions such as "front", "rear", "left", "right", "up", and "down" are not limited. Although the present utility model has been described with reference to the above embodiments, those skilled in the art should understand that they can still modify, combine or make equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A thermostatic expansion valve, characterized in that, The device includes a valve body (1) and a valve core assembly (2). The valve body (1) has a first channel (11) and a second channel (12). The valve core assembly (2) includes a flow channel (22) with a flow channel (223). The flow channel (22) is movable relative to the valve body (1) so that the flow channel (223) connects the first channel (11) and the second channel (12).

2. The thermostatic expansion valve according to claim 1, characterized in that, The valve core assembly (2) further includes a fixing member (21) fixed inside the valve body (1). The fixing member (21) has a first opening (211), a second opening (212), and a receiving cavity (213). The first opening (211) communicates with the first channel (11), and the second opening (212) communicates with the second channel (12). The flow channel member (22) is slidably disposed in the receiving cavity (213). The flow channel member (22) is movable relative to the fixing member (21) so that the flow channel (223) communicates with the first opening (211) and the second opening (212).

3. The thermostatic expansion valve according to claim 2, characterized in that, The flow channel component (22) has a first flow channel opening (221) and a second flow channel opening (222) communicating with the flow channel (223); the flow channel component (22) is movable relative to the fixing member (21) so that the first opening (211) communicates with the first flow channel opening (221) and the second flow channel opening (222) communicates with the second opening (212).

4. The thermostatic expansion valve according to claim 3, characterized in that, The flow channel (223) includes a first flow channel section (2231) connected to the first flow channel opening (221), a second flow channel section (2232) connected to the second flow channel opening (222), and a third flow channel section (2233) connecting the first flow channel section (2231) and the second flow channel section (2232), and the flow area of ​​the second flow channel section (2232) is smaller than the flow area of ​​the first flow channel section (2231) and the third flow channel section (2233); The connection between the first flow channel portion (2231) and the third flow channel portion (2233) has an arc transition portion, and / or the connection between the second flow channel portion (2232) and the third flow channel portion (2233) has an arc transition portion.

5. The thermostatic expansion valve according to claim 3, characterized in that, The flow channel component (22) has a first position that connects the flow channel (223) to the first opening (211) and the second opening (212) and a second position that disconnects the flow channel (223) from the first opening (211) and the second opening (212); The flow channel component (22) is located in a first position, the first opening (211) is connected to the first flow channel opening (221), and the second opening (212) is connected to the second flow channel opening (222); The flow channel component (22) is located in a second position, where the first opening (211) is axially offset from the first flow channel opening (221), and the second opening (212) is connected to the second flow channel opening (222); or, the first opening (211) is connected to the first flow channel opening (221), and the second opening (212) is axially offset from the second flow channel opening (222); or, the first opening (211) is axially offset from the first flow channel opening (221), and the second opening (212) is axially offset from the second flow channel opening (222).

6. The thermostatic expansion valve according to claim 3, characterized in that, Along the axial direction of the thermal expansion valve, the height region where the second flow channel (222) is located is spaced apart from the height region where the first flow channel (221) is located. Along the axial direction perpendicular to the thermal expansion valve, the projection of the first channel (11) and the projection of the second channel (12) are misaligned. Alternatively, along the axial direction of the thermal expansion valve, the height region where the second flow port (222) is located at least partially overlaps with the height region where the first flow port (221) is located, and along the axial direction perpendicular to the thermal expansion valve, the projection of the first channel (11) and the projection of the second channel (12) at least partially overlap.

7. The thermostatic expansion valve according to claim 3, characterized in that, The first opening (211) and the first flow channel opening (221) are both provided as one, and the flow channel component (22) can move relative to the fixing component (21) to make the first opening (211) and the first flow channel opening (221) connected or disconnected. Alternatively, the first opening (211) and the first flow channel opening (221) are both provided as multiple, and the flow channel component (22) can move relative to the fixing component (21) to make each first opening (211) and each first flow channel opening (221) connected or disconnected in a one-to-one correspondence. The second opening (212) and the second flow channel opening (222) are both provided as one, and the flow channel component (22) can move relative to the fixing component (21) to make the second opening (212) and the second flow channel opening (222) connected or disconnected. Alternatively, the second opening (212) and the second flow channel opening (222) are both provided as multiple, and the flow channel component (22) can move relative to the fixing component (21) to make each second opening (212) and each second flow channel opening (222) connected or disconnected in a one-to-one correspondence.

8. The thermal expansion valve according to any one of claims 3 to 7, characterized in that, The first opening (211), the second opening (212), the first flow channel opening (221), and the second flow channel opening (222) are rectangular, elliptical, or triangular.

9. The thermostatic expansion valve according to claim 3, characterized in that, The valve core assembly (2) further includes a first sealing ring (23) and a second sealing ring (24); the top surface of the fixing member (21) is provided with a first mounting groove (214) for installing the first sealing ring (23), and the side surface of the fixing member (21) is provided with a second mounting groove (215) for installing the second sealing ring (24), and the second mounting groove (215) is located on the side of the first flow channel (221) away from the second flow channel (222).

10. The thermostatic expansion valve according to claim 1, characterized in that, The valve body (1) also has a valve chamber (13), and the thermostatic expansion valve further includes an adjustment component (3) disposed in the valve chamber (13). The adjustment component (3) includes an adjustment seat (31) and an adjustment spring (32). The adjustment seat (31) is threadedly connected to the inner wall of the valve chamber (13). One end of the adjustment spring (32) abuts against the adjustment seat (31), and the other end abuts against the flow channel component (22).

11. The thermostatic expansion valve according to claim 1, characterized in that, The thermal expansion valve also includes a gas tank head (4), which includes a gas tank cover (41), a gas tank seat (42), a diaphragm (43), a transmission block (44), and a valve stem (45). The gas tank cover (41) is fixed to the gas tank seat (42). The diaphragm (43) is located between the gas tank cover (41) and the gas tank seat (42). The transmission block (44) is located below the diaphragm (43). One end of the valve stem (45) abuts against the transmission block (44), and the other end of the valve stem (45) abuts against the flow channel component (22).

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