Reversing valve and air conditioning system

Abstract

The application provides a reversing valve and an air conditioning system. The reversing valve comprises a valve body, a driving assembly and a slider. The valve body has a valve cavity. The driving assembly is slidably arranged in the valve cavity and comprises a piston component and a guide frame. The middle part of the guide frame is provided with an opening. The piston component is connected to the end of the guide frame. The slider is arranged in the opening of the guide frame and comprises an outward convex curved surface part and an abutting part. The edge of the curved surface part is connected to the abutting part, the abutting part abuts against the guide frame, the curved surface part has an outward convex top surface, and the top surface is provided with a convex structure. The valve body comprises a first sub-valve body and a second sub-valve body. The first sub-valve body and the second sub-valve body are communicated. In a plane perpendicular to the moving direction of the piston component, the area of the orthographic projection of the second sub-valve body is smaller than that of the first sub-valve body.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to a reversing valve and an air conditioning system. Background Technology

[0002] In air conditioning systems, reversing valves are typically used as control components to switch the flow direction of the refrigerant, thereby enabling the air conditioner to switch between cooling and heating modes, achieving the dual purpose of cooling in summer and heating in winter.

[0003] The main valve component of the reversing valve has four pipes, which connect to the compressor suction pipe, indoor heat exchanger, outdoor heat exchanger, and compressor discharge pipe, respectively. Two pistons on the main valve component are fixedly connected by a guide bracket. The pistons drive the guide bracket, causing a slider to slide along the upper surface of the main valve seat to achieve the switching between cooling and heating. Currently, the valve body diameter of existing reversing valves is uniform, with the end cap diameter, piston diameter, and valve body diameter all being the same. A larger valve body results in a larger piston diameter, leading to a greater impact force on the end cap during reversal and increasing the risk of piston damage under abnormal operating conditions. To address this, related technologies have incorporated variable-diameter valve bodies for reversing valves; however, current variable-diameter valve bodies often result in insufficient driving force during reversal.

[0004] The above description of "prior art" provides background information only and does not acknowledge that the above description of "prior art" discloses the subject matter of this application. It does not constitute prior art of this application, and no description of the above "prior art" should be considered part of this application. Utility Model Content

[0005] A primary objective of this application is to overcome at least one of the deficiencies of the prior art and to provide a variable diameter valve body that reduces the impact force on the end cap during reversing and the risk of damage to the piston and guide frame under abnormal operating conditions, while ensuring sufficient driving force during reversing.

[0006] To achieve the above objectives, this application adopts the following technical solution: According to one aspect of this application, a reversing valve is provided, including a valve body, a drive unit, and a slider. The valve body has a valve cavity. A drive assembly is slidably disposed in the valve cavity, and the drive assembly includes a guide frame and a piston component, the guide frame having an opening in the middle. The piston component is connected to an end of the guide frame. The slider is disposed at the opening of the guide frame, the slider including a convex curved surface and an abutment portion, the edge of the curved surface connecting to the abutment portion, the abutment portion abutting against the guide frame, the curved surface having a convex top surface, and the top surface having a protruding structure. The valve body includes a first sub-valve body and a second sub-valve body, the first sub-valve body and the second sub-valve body communicating with each other, and on a plane perpendicular to the moving direction of the piston component, the area of ​​the orthographic projection of the second sub-valve body is smaller than the area of ​​the orthographic projection of the first sub-valve body.

[0007] According to one embodiment of this application, at least one recessed surface is provided at each end of the outer peripheral surface of the protrusion structure along the direction of movement of the piston component.

[0008] According to one embodiment of this application, the reversing valve further includes a main valve component, which includes the valve body and a pipe connected to the valve body. The pipe includes a first pipe, a second pipe, a third pipe, and a fourth pipe. The first pipe is used to connect to an outdoor heat exchanger, the second pipe is used to connect to the outlet end of the compressor, the third pipe is used to connect to an indoor heat exchanger, and the fourth pipe is used to connect to the suction end of the compressor. The abutting portion of the slider has a first sliding surface and a second sliding surface. Along the direction of movement of the piston component, the distance between the first sliding surface and the third pipe is less than the distance between the second sliding surface and the third pipe. The length of the first sliding surface is defined as L1, and the length of the second sliding surface is defined as L2. If the diameters of the first pipe, the third pipe, and the fourth pipe are all d1, then L1 is less than d1, and L2 is less than d1.

[0009] According to one embodiment of this application, the reversing valve further includes a main valve component. The main valve component includes the valve body and a pipe connected to the valve body. The pipe includes a first pipe, a second pipe, a third pipe, and a fourth pipe. The first pipe is used to connect to an outdoor heat exchanger, the second pipe is used to connect to the outlet end of the compressor, the third pipe is used to connect to an indoor heat exchanger, and the fourth pipe is used to connect to the suction end of the compressor. The abutment portion of the slider has a first sliding surface and a second sliding surface. Along the direction of movement of the piston component, the distance between the first sliding surface and the third pipe is less than the distance between the second sliding surface and the third pipe. The length of the first sliding surface is defined as L1, and the length of the second sliding surface is defined as L2. If the diameter of the first pipe is d2 and the diameter of the third pipe is d1, where d1 is not equal to d2, then L1 is less than d1, or L2 is less than d2.

[0010] According to one embodiment of this application, the diameter of the protrusion structure is larger than the inner diameter of the second pipe fitting.

[0011] According to one embodiment of this application, the gap between the top of the protruding structure and the inner wall of the valve body is 0-4.5 mm.

[0012] According to one embodiment of this application, the guide frame includes a flat plate with an opening in the middle, and the piston component is connected to both ends of the flat plate.

[0013] According to one embodiment of this application, end caps are provided at both ends of the valve body, and the piston component includes an end baffle and a frame baffle. The end baffle faces the end cap, and the frame baffle faces the guide frame. The thickness of the plate is greater than or equal to the thickness of the end baffle or the thickness of the frame baffle.

[0014] According to one embodiment of this application, the end cap includes a mounting section, a connecting section, and a contact section. The mounting section is used to mount the end cap to the valve body, the contact section is used to contact the piston component, and the connecting section is used to connect the mounting section and the contact section.

[0015] According to one embodiment of this application, the connecting section is an arc-shaped section that gradually transitions from the outer periphery of the end cap along the radial direction of the end cap to the center of the end cap, such that the contact section protrudes from the mounting section along the axial direction of the end cap.

[0016] According to one embodiment of this application, the plate includes a middle portion and two end portions, the middle portion connecting the two end portions, and the width of the middle portion being greater than the width of the two end portions.

[0017] According to one embodiment of this application, both ends of the plate are connected to the piston component by screws and rivets.

[0018] According to one embodiment of this application, one end of the plate is connected to the piston component by screws and rivets, and the other end is connected to the piston component by screws or rivets.

[0019] According to one embodiment of this application, there are two second sub-valve bodies, which are respectively disposed at both ends of the first sub-valve body. One end of the second sub-valve body has a flared structure, which is used to connect the second sub-valve body to the first sub-valve body.

[0020] According to one embodiment of this application, there are two second sub-valve bodies, which are respectively disposed at both ends of the first sub-valve body, and the second sub-valve body is connected to the first sub-valve body through a variable diameter sleeve.

[0021] According to one embodiment of this application, a flanged hole is provided at the end of the second sub-valve body facing away from the first sub-valve body. The flanged hole faces the valve cavity or faces the outside of the valve body, and the flanged hole is used to connect a capillary tube.

[0022] According to another aspect of this application, an air conditioning system is provided, including the reversing valve as described above.

[0023] As can be seen from the above technical solution, the advantages and positive effects of the reversing valve proposed in this application are as follows: The directional control valve proposed in this application comprises a first sub-valve body and a second sub-valve body, which are connected. On a plane perpendicular to the direction of movement of the piston assembly, the area of ​​the orthographic projection of the second sub-valve body is smaller than the area of ​​the orthographic projection of the first sub-valve body. The directional control valve employs a variable-diameter valve body structure, which reduces the impact force on the end cover during directional control and lowers the risk of piston and guide frame damage under abnormal operating conditions.

[0024] The reversing valve proposed in this application has a raised structure on the top surface of the slider. This structure can prevent the refrigerant in the inlet pipe of the second fitting from being depressurized during the reversing process, allowing more refrigerant to enter the second sub-valve body at the corresponding end. This increases the refrigerant pressure in the second sub-valve body and thus increases the driving force. This ensures sufficient driving force during reversing and avoids the problem of reduced driving force due to the small size of the second sub-valve body. Attached Figure Description

[0025] 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. Wherein: Figure 1 This is a schematic diagram of the reversing valve according to the first embodiment of this application.

[0026] Figure 2 yes Figure 1 A schematic diagram of the slider in the diagram.

[0027] Figure 3 yes Figure 1 A schematic diagram of the guide frame structure.

[0028] Figure 4 yes Figure 1 Enlarged view of point I.

[0029] Figure 5 yes Figure 1 A schematic diagram of the structure of the second sub-valve body.

[0030] Figure 6 yes Figure 1A partial enlarged structural diagram of one embodiment shown.

[0031] Figure 7 yes Figure 1 An enlarged schematic diagram of a portion of the structure of another embodiment shown.

[0032] Figure 8 This is a schematic diagram of the reversing valve according to the second embodiment of this application.

[0033] Figure 9 yes Figure 8 A schematic diagram of the structure of the second sub-valve body in the second embodiment shown.

[0034] Figure 10 yes Figure 8 The diagram shows the structure of the variable diameter sleeve according to the second embodiment.

[0035] The annotations in the attached figures are explained as follows: 1-Reversing valve; 2-Capillary; 10-Main valve assembly; 100 - Valve body; 101 - First sub-valve body; 102 - Second sub-valve body; 1021 - Flared structure; 1022 - Flanged hole; 1023 - Flaring edge; 103 - First fitting; 104 - Second fitting; 105 - Third fitting; 106 - Fourth fitting; 107 - End Cap; 1071 - Installation section; 1072-Connecting section; 1073 - Contact section; 108 - Reducing sleeve; 1081 - First end; 1082 - Second end; 1083 - Conical part; 20-Guide frame; 201 - Opening; 202-flat plate; 2021 - Middle Section; 2022-end; 203 - Screws; 204 rivets; 30 - Piston components; 301 - End baffle; 302 - Frame baffle; 40-Slider; 401-curved face; 402-butt part; 403 - Protruding structure; 4031 - Outer peripheral surface; 4032 - Concave surface; 404 - First sliding surface; 405 - Second sliding surface; T1 - Thickness of the end baffle; The thickness of the T2 frame baffle; The thickness of the plate of the T3 guide frame. Detailed Implementation

[0036] 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.

[0037] In the following description of various exemplary embodiments of this application, reference is made to the accompanying drawings, which form part of this application, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this application. It should be understood that other specific solutions to components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this application. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application.

[0038] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0039] As used herein, “about,” “approximately,” “essentially,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement under discussion and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or, for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, the use of “about,” “approximately,” “essentially,” or “substantially” herein may be chosen to select a more acceptable range of deviations or standard deviations depending on the nature of the measurement, the cutting nature, or other properties, and may not require a single standard deviation to apply to all properties.

[0040] Furthermore, relative terms such as “down” or “bottom” and “up” or “top” may be used herein to describe the relationship between one element and another, as illustrated in the figures. It should be understood that relative terms are intended to include different orientations of the device beyond those shown in the figures. For example, if a device in one figure is flipped, an element described as being “down” to another element will be oriented “up” to that element. Thus, the exemplary term “down” can include both “down” and “up” orientations, depending on the specific orientation of the figure. Similarly, if a device in one figure is flipped, an element described as being “below” or “under” another element will be oriented “above” that element. Thus, the exemplary terms “above” or “below” can include both “up” and “down” orientations.

[0041] This document describes exemplary embodiments with reference to cross-sectional views, which are schematic diagrams of idealized embodiments. Therefore, variations in the shape of the illustrations can be expected as a result of, for example, manufacturing techniques and / or tolerances. Consequently, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include, for example, shape deviations caused by manufacturing processes. For example, regions shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, the acute angles shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to show the precise shapes of the regions, nor are they intended to limit the scope of this application.

[0042] like Figures 1 to 3As shown, the directional control valve 1 of this application includes a main valve component 10, a guide frame 20, a piston component 30, and a slider 40. The guide frame 20 and the piston component 30 form a drive assembly. The main valve component 10 has a valve body 100 and pipe fittings (103, 104, 105, 106) communicating with the valve body 100. The guide frame 20 is slidably disposed in the valve body 100 of the main valve component 10, and an opening 201 is provided in the middle of the guide frame 20. The piston component 30 is slidably disposed in the valve body 100 of the main valve component 10 and connected to the end 2022 of the guide frame 20. The slider 40 is disposed in the opening 201 of the guide frame 20. The slider 40 includes an outwardly convex curved surface 401 and an abutment portion 402. The edge of the curved surface 401 is connected to the abutment portion 402, and the abutment portion 402 abuts against the guide frame 20. The curved surface 401 has an outwardly convex top surface, and a protruding structure 403 is provided on the top surface. The valve body 100 includes a first sub-valve body 101 and a second sub-valve body 102, which are connected. On a plane perpendicular to the moving direction of the piston component 30, the area of ​​the orthographic projection of the second sub-valve body 102 is smaller than the area of ​​the orthographic projection of the first sub-valve body 101.

[0043] The reversing valve 1 of this application adopts a valve body 100 that is larger in the middle and smaller on both sides, which can reduce the impact force on the end cover 107 when the reversing valve 1 reverses, and reduce the risk of damage to the piston component 30 and guide frame 20 under abnormal operating conditions. The top surface of the slider 40 is provided with a protruding structure 403, which allows the reversing valve 1 to block the refrigerant in the inlet pipe of the second pipe 104 from being depressurized during the reversing process. This allows more refrigerant to enter the second sub-valve body 102 at the corresponding end, increasing the refrigerant pressure in the second sub-valve body 102 and thus increasing the driving force. In this way, the driving force is sufficient during reversing, avoiding the problem of reduced driving force due to the small size of the second sub-valve body 102, and improving the reliability and stability of reversing.

[0044] The pipe fittings include a first pipe fitting 103, a second pipe fitting 104, a third pipe fitting 105, and a fourth pipe fitting 106. The first pipe fitting 103 of the reversing valve 1 is connected to the outdoor heat exchanger, the second pipe fitting 104 is connected to the outlet end of the compressor, the third pipe fitting 105 is connected to the indoor heat exchanger, and the fourth pipe fitting 106 is connected to the suction end of the compressor.

[0045] When the air conditioner is in cooling mode, the piston component 30 pushes the slider 40 to the left under pressure, thereby connecting the first pipe 103 of the reversing valve 1 with the second pipe 104, and the third pipe 105 with the fourth pipe 106. The high-pressure refrigerant gas in the second pipe 104 enters the outdoor heat exchanger (as a condenser) through the first pipe 103 to dissipate heat to the outside, then enters the indoor heat exchanger (as an evaporator) through the pipeline, then enters the fourth pipe 106 through the third pipe 105, and finally returns to the compressor to complete the refrigeration cycle.

[0046] When the air conditioner is in heating mode, the piston component 30 pushes the slider 40 to the right under pressure, thereby connecting the second pipe 104 and the third pipe 105 of the reversing valve 1, and connecting the first pipe 103 and the fourth pipe 106. The high-pressure refrigerant gas in the second pipe 104 enters the indoor heat exchanger (as a condenser) through the third pipe 105 to dissipate heat into the room, then enters the outdoor heat exchanger (as an evaporator) through the pipeline, then enters the fourth pipe 106 through the first pipe 103, and finally returns to the compressor, completing the heating cycle.

[0047] In this embodiment, as Figure 2 As shown, along the direction of movement of the piston component 30, at least one recessed surface 4032 is provided at each end of the outer peripheral surface 4031 of the protruding structure 403. The recessed surface 4032 can prevent the second pipe 104 from being blocked by the protruding structure 403 when it enters the valve body 100 after reversing or in a certain state before reversing, thus ensuring sufficient or more flow and preventing the flow rate from decreasing.

[0048] In this embodiment, the diameter of the protruding structure 403 is larger than the inner diameter of the second pipe 104. This design allows the protruding structure 403 to block the second pipe 104 when the slider 40 moves to the middle position of the valve cavity, preventing the high-pressure refrigerant in the second pipe 104 from entering the valve cavity. The second pipe 104 is approximately located in the middle of the valve cavity's length direction and extends into the valve cavity. When the slider 40 is located on either side of the valve cavity's length direction, the gap between the protruding structure 403 of the slider 40 and the inner wall of the valve cavity is 0-4.5mm, which can be 1mm, 2mm, 3mm, 4mm, etc. This gap ensures that the slider 40 can slide smoothly in the valve cavity, while also ensuring that the protruding structure 403 blocks the second pipe 104 when the slider 40 moves to the middle position of the valve cavity. The protruding structure 403 of the slider 40 has some elasticity, allowing it to block the second pipe 104 in the middle position while still being able to slide smoothly in the valve cavity.

[0049] In this embodiment, as Figure 3As shown, the guide frame 20 includes a flat plate 202 with an opening 201 in the middle. Piston components 30 are connected to both ends of the flat plate 202. The flat plate 202 includes a middle portion 2021 and two end portions 2022. The middle portion 2021 connects to the two end portions 2022, and the width of the middle portion 2021 is greater than the width of the two end portions 2022. The width of the two end portions 2022 is reduced to accommodate the second sub-valve body 102.

[0050] In this embodiment, see Figure 1 and Figure 4 The main valve component 10 includes end caps 107 disposed at both ends of the valve body 100, which close the valve body 100. The end caps 107 at both ends of the valve body 100 are identical in shape and arranged opposite to each other. The piston component 30 includes an end baffle 301 and a support baffle 302. The end baffle 301 faces the end caps 107, and the support baffle 302 faces the guide frame 20. The end baffle 301 and the support baffle 302 can be welded together by a U-shaped structural member. The thickness T3 of the plate 202 is greater than or equal to the thickness T1 of the end baffle 301 or the thickness T2 of the support baffle 302. The thickness T3 of the plate 202 being greater than or equal to the thickness T1 of the end baffle 301 or the thickness T2 of the support baffle 302 can improve structural strength and reduce the risk of damage to the piston component 30 and the guide frame 20 under abnormal operating conditions.

[0051] In this embodiment, the end cap 107 includes a mounting section 1071, a connecting section 1072, and a contact section 1073. The mounting section 1071 is used to mount the end cap 107 to the valve body 100, the contact section 1073 is used to contact the piston component 30, and the connecting section 1072 is used to connect the mounting section 1071 and the contact section 1073. The connecting section 1072 is an arc-shaped segment that gradually transitions from the outer periphery of the end cap 107 along the radial direction of the end cap 107 towards the center of the end cap 107, such that the contact section 1073 protrudes axially from the mounting section 1071 along the end cap 107. The end cap 107 adopts a three-section structure, which reduces the contact area with the piston component 30. The connecting section 1072 is provided for transition, which can reduce the impact of the piston component 30 on the end cap 107. The connecting section 1072 plays a certain buffering role, which can improve the reliability of the end cap 107 in sealing the valve body 100, greatly reduce the probability of refrigerant leakage, ensure the stability of the operation of the reversing valve 1, and extend the service life of the four-way valve.

[0052] In this embodiment, see Figure 4 Both ends of the flat plate 202 are connected to the piston component 30 by screws 203 and rivets 204. This improves the connection strength and firmness between the guide frame 20 and the piston component 30.

[0053] In this embodiment, see Figure 1 and Figure 5There are two second sub-valve bodies 102, which are respectively disposed at both ends of the first sub-valve body 101. One end of the second sub-valve body 102 has a flared structure 1021, which is used to connect the second sub-valve body 102 to the first sub-valve body 101. The end 2022 of the second sub-valve body 102 facing away from the first sub-valve body 101 is provided with a flanged hole 1022, which is used to connect the capillary tube 2.

[0054] In this application, seals are provided at the connections between the multiple sub-valve bodies 100, and seals are also provided at the connections between the valve body 100 and each pipe fitting. Other components of the directional valve 1 in this application are also sealed at the required locations to ensure no leakage occurs. Conventional seals in the art can be used for these seals.

[0055] In this embodiment, different scenarios may exist depending on the relationship between the diameters of the first pipe fitting 103, the third pipe fitting 105, and the fourth pipe fitting 106. Figure 6 One embodiment is shown, where the abutment portion 402 of the slider 40 has a first sliding surface 404 and a second sliding surface 405. Along the direction of movement of the piston component 30, the distance between the first sliding surface 404 and the third tube 105 is less than the distance between the second sliding surface 405 and the third tube 105. The length of the first sliding surface 404 is defined as L1, and the length of the second sliding surface 405 is defined as L2. The length of the sliding surface refers to the length of the axis of symmetry of the slider 40 along the direction of movement of the piston component 30 on the sliding surface. If the diameters of the first tube 103, the third tube 105, and the fourth tube 106 are all d1, then L1 is less than d1, and L2 is less than d1.

[0056] Figure 7 This illustrates another scenario. Figure 7 In this scenario, the diameters of the first tube 103 and the third tube 105 are not equal. The abutment portion 402 of the slider 40 has a first sliding surface 404 and a second sliding surface 405. Along the direction of movement of the piston component 30, the distance between the first sliding surface 404 and the third tube 105 is less than the distance between the second sliding surface 405 and the third tube 105. The length of the first sliding surface 404 is defined as L1, and the length of the second sliding surface 405 is defined as L2. The length of the sliding surface refers to the length of the axis of symmetry of the slider 40 along the direction of movement of the piston component 30 on the sliding surface. If the diameter of the first tube 103 is d2 and the diameter of the third tube 105 is d1, where d1 is not equal to d2, then L1 is less than d1, or L2 is less than d2.

[0057] like Figure 8 As shown, the reversing valve 1 of this application also has a second embodiment, in which the reversing valve 1 of the second embodiment is related to... Figures 1 to 7Compared to the directional valve 1 of the second embodiment, it has a substantially the same structure in its basic construction. Therefore, in the following description of the directional valve 1 of this second embodiment, the description will not be repeated. Figures 1 to 7 The structure has already been described in the implementation method. Additionally, regarding... Figures 1 to 7 The structures of the reversing valve 1 described in the embodiments are the same as those of the original valve and are marked with the same reference numerals. Therefore, in the following description of this embodiment, the structures of the same type as the reversing valve 1 will be mainly referred to. Figures 1 to 7 The differences between the reversing valve 1 in this second embodiment and the previous embodiment will be explained. Specifically, the reversing valve 1 in this second embodiment mainly features two second sub-valve bodies 102, each disposed at one end of the first sub-valve body 101. The second sub-valve bodies 102 are connected to the first sub-valve body 101 via a reducing sleeve 108. The reducing sleeve 108 simplifies the machining of the second sub-valve bodies 102 and improves their overall strength.

[0058] In this embodiment, as Figure 9 As shown, the second sub-valve body 102 includes a flared edge 1023 for connecting the second sub-valve body 102 and the variable diameter sleeve 108. The end of the second sub-valve body 102 facing away from the first sub-valve body 101 is provided with a flanged hole 1022 for connecting the capillary tube 2.

[0059] Figure 10 The variable diameter sleeve 108 of this embodiment is shown. The variable diameter sleeve 108 includes a first end 1081, a second end 1082, and a tapered portion 1083 connecting the first end 1081 and the second end 1082, wherein the diameter of the first end 1081 is smaller than that of the second end 1082. See [reference needed]. Figure 8 The first end 1081 is used to connect to the second sub-valve body 102, and the second end 1082 is used to connect to the first sub-valve body 101.

[0060] The reversing valve 1 of this application also has a third embodiment, wherein the reversing valve 1 of the third embodiment is related to... Figures 1 to 7 Compared to the directional valve 1 of the third embodiment, it has a substantially similar structure in its basic construction. Therefore, in the following description of the directional valve 1 of this third embodiment, the description will not be repeated. Figures 1 to 7 The structure has already been described in the implementation method. Additionally, regarding... Figures 1 to 7 The structures of the reversing valve 1 described in the embodiments are the same as those of the original valve and are marked with the same reference numerals. Therefore, in the following description of this embodiment, the structures of the same type as the reversing valve 1 will be mainly referred to. Figures 1 to 7 The differences between the reversing valve 1 in the third embodiment will be explained. In this third embodiment, the reversing valve 1 is mainly characterized by one end of the plate 202 of the guide frame 20 of the reversing valve 1 being connected to the piston component 30 by screws 203 and rivets 204, and the other end being connected to the piston component 30 by screws 203 or rivets 204.

[0061] This application also provides an air conditioning system including the above-mentioned reversing valve 1. The air conditioning system of this application, by setting the above-mentioned reversing valve 1, can reduce the impact force on the end cover 107 when the reversing valve 1 reverses, and reduce the risk of damage to the piston component 30 and guide frame 20 under abnormal operating conditions; at the same time, it can ensure sufficient driving force when reversing, and avoid the problem of reduced driving force caused by the small size of the second sub-valve body 102.

[0062] In summary, the directional control valve proposed in this application includes a main valve assembly, a guide frame, a piston assembly, and a slider. The main valve assembly has a valve body and a pipe communicating with the valve body. The valve body includes a first sub-valve body and a second sub-valve body, which are connected. On a plane perpendicular to the direction of movement of the piston assembly, the area of ​​the orthographic projection of the second sub-valve body is smaller than the area of ​​the orthographic projection of the first sub-valve body. The directional control valve adopts a variable diameter valve body structure, which can reduce the impact force on the end cover during directional control valve switching and reduce the risk of piston and guide frame damage under abnormal operating conditions.

[0063] The reversing valve proposed in this application has a guide frame disposed within the valve cavity of the valve body, with an opening in the middle of the guide frame. A slider is disposed within the opening of the guide frame, and the slider includes a convex curved surface and an abutment portion. The edge of the curved surface connects to the abutment portion, which abuts against the guide frame. The curved surface has a convex top surface with a raised structure. The raised structure on the top surface of the slider allows the reversing valve to prevent the refrigerant in the inlet pipe of the second fitting from being depressurized during the reversing process. This allows more refrigerant to enter the second sub-valve body at the corresponding end, increasing the refrigerant pressure within the second sub-valve body and thus increasing the driving force. This ensures sufficient driving force during reversing and avoids the problem of reduced driving force due to the small size of the second sub-valve body.

[0064] The reversing valve of this application is used in air conditioning systems, such as being installed inside the outdoor unit of an air conditioning system. The outdoor unit typically houses components that form the refrigerant circuit, such as a compressor, a storage tank, an outdoor heat exchanger, an oil separator, various valves, and a distributor, as well as electrical installation units.

[0065] It is understood that the various embodiments / implementations provided by this utility model can be combined with each other without creating contradictions, and will not be described one by one here.

[0066] In the above exemplary embodiments, the reversing valve and air conditioning system proposed in this utility model are described using an application in the refrigeration field as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments to apply the relevant designs of this utility model to other fields, and these changes are still within the scope of the principles of the reversing valve and air conditioning system proposed in this utility model.

[0067] It should be noted that the reversing valves and air conditioning systems shown in the accompanying drawings and described in this specification are merely a few examples of many reversing valves and air conditioning systems from which the principles of this invention can be employed. It should be clearly understood that the principles of this invention are by no means limited to any detail or component of the reversing valves and air conditioning systems shown in the accompanying drawings or described in this specification.

[0068] In the embodiments of the utility model, 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 explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" 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 the utility model according to the specific circumstances.

[0069] In the description of the utility model embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the utility model embodiments 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 utility model embodiments.

[0070] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the utility model. When introducing elements / components / etc. described and / or illustrated herein, the terms "a," "a," and "the above" are used to indicate the presence of one or more elements / components / etc. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A reversing valve (1), characterized in that: include: Valve body (100) has a valve cavity; A drive assembly is slidably disposed within the valve chamber. The drive assembly includes a guide frame (20) and a piston component (30). An opening (201) is provided in the middle of the guide frame (20). The piston component (30) is connected to the end (2022) of the guide frame (20). A slider (40) is disposed in the opening (201) of the guide frame (20). The slider (40) includes a convex curved surface (401) and an abutment portion (402). The edge of the curved surface (401) is connected to the abutment portion (402). The abutment portion (402) abuts against the guide frame (20). The curved surface (401) has a convex top surface, and a protruding structure (403) is provided on the top surface. The valve body (100) includes a first sub-valve body (101) and a second sub-valve body (102), which are connected. On a plane perpendicular to the moving direction of the piston component (30), the area of ​​the orthographic projection of the second sub-valve body (102) is smaller than the area of ​​the orthographic projection of the first sub-valve body (101).

2. The reversing valve (1) as described in claim 1, characterized in that: Along the direction of movement of the piston component (30), at least one recessed surface (4032) is provided at each end of the outer peripheral surface (4031) of the protrusion structure (403).

3. The reversing valve (1) as described in claim 1, characterized in that: It also includes a main valve assembly (10), which includes the valve body (100) and pipes communicating with the valve body (100). The pipes include a first pipe (103), a second pipe (104), a third pipe (105), and a fourth pipe (106). The first pipe (103) is used to communicate with the outdoor heat exchanger, the second pipe (104) is used to communicate with the outlet of the compressor, the third pipe (105) is used to communicate with the indoor heat exchanger, and the fourth pipe (106) is used to communicate with the outdoor heat exchanger. 106) For communication with the suction end of the compressor, wherein the abutment portion (402) of the slider (40) has a first sliding surface (404) and a second sliding surface (405). Along the direction of movement of the piston component (30), the distance between the first sliding surface (404) and the third pipe (105) is less than the distance between the second sliding surface (405) and the third pipe (105). The length of the first sliding surface (404) is defined as L1, and the length of the second sliding surface (405) is defined as L2. If the diameters of the first pipe fitting (103), the third pipe fitting (105), and the fourth pipe fitting (106) are all d1, then L1 is less than d1 and L2 is less than d1.

4. The reversing valve (1) as described in claim 1, characterized in that: It also includes a main valve assembly (10), which includes the valve body (100) and a pipe connected to the valve body (100). The pipe includes a first pipe (103), a second pipe (104), a third pipe (105), and a fourth pipe (106). The first pipe (103) is used to connect to the outdoor heat exchanger, the second pipe (104) is used to connect to the outlet end of the compressor, the third pipe (105) is used to connect to the indoor heat exchanger, and the fourth pipe (106) is used to connect to the suction end of the compressor. The abutment portion (40) of the slider (40) 2) Having a first sliding surface (404) and a second sliding surface (405), along the direction of movement of the piston component (30), the distance between the first sliding surface (404) and the third pipe (105) is less than the distance between the second sliding surface (405) and the third pipe (105). The length of the first sliding surface (404) is defined as L1, and the length of the second sliding surface (405) is defined as L2. If the diameter of the first pipe (103) is d2 and the diameter of the third pipe (105) is d1, where d1 is not equal to d2, then L1 is less than d1, or L2 is less than d2.

5. The reversing valve (1) as described in claim 3 or 4, characterized in that, The diameter of the protruding structure (403) is larger than the inner diameter of the second pipe fitting (104).

6. The reversing valve (1) as described in claim 1, characterized in that, The gap between the top of the protruding structure (403) and the inner wall of the valve body (100) is 0-4.5 mm.

7. The reversing valve (1) as described in claim 1, characterized in that: The guide frame (20) includes a plate (202) with an opening (201) in the middle and the piston component (30) connected to both ends of the plate (202).

8. The reversing valve (1) as described in claim 7, characterized in that: The valve body (100) is provided with end caps (107) at both ends. The piston component (30) includes an end baffle (301) and a frame baffle (302). The end baffle (301) faces the end cap (107), and the frame baffle (302) faces the guide frame (20). The thickness of the plate (202) is greater than or equal to the thickness of the end baffle (301) or the thickness of the frame baffle (302).

9. The reversing valve (1) as described in claim 8, characterized in that: The end cap (107) includes a mounting section (1071), a connecting section (1072), and a contact section (1073). The mounting section (1071) is used to mount the end cap (107) onto the valve body (100). The contact section (1073) is used to contact the piston component (30). The connecting section (1072) is used to connect the mounting section (1071) and the contact section (1073).

10. The reversing valve (1) as described in claim 9, characterized in that: The connecting section (1072) is an arc-shaped section that gradually transitions from the outer periphery of the end cap (107) to the center of the end cap (107) along the radial direction of the end cap (107), such that the contact section (1073) protrudes from the mounting section (1071) along the axial direction of the end cap (107).

11. The reversing valve (1) as described in claim 7, characterized in that: The plate (202) includes a middle part (2021) and two ends (2022), the middle part (2021) connects the two ends (2022), and the width of the middle part (2021) is greater than the width of the two ends (2022).

12. The reversing valve (1) as described in claim 7, characterized in that: Both ends of the plate (202) are connected to the piston component (30) by screws (203) and rivets (204).

13. The reversing valve (1) as described in claim 7, characterized in that: One end of the plate (202) is connected to the piston component (30) by screws (203) and rivets (204), and the other end is connected to the piston component (30) by screws (203) or rivets (204).

14. The reversing valve (1) as claimed in claim 1, characterized in that, There are two second sub-valve bodies (102), which are respectively disposed at both ends of the first sub-valve body (101). One end of the second sub-valve body (102) has a flared structure (1021), which is used to connect the second sub-valve body (102) to the first sub-valve body (101).

15. The reversing valve (1) as described in claim 1, characterized in that, There are two second sub-valve bodies (102), which are respectively disposed at both ends of the first sub-valve body (101). The second sub-valve body (102) is connected to the first sub-valve body (101) through a variable diameter sleeve (108).

16. The reversing valve (1) as described in claim 14 or 15, characterized in that, The second sub-valve body (102) has a flanged hole (1022) at the end opposite to the first sub-valve body (101). The flanged hole (1022) faces the valve cavity or the outside of the valve body (100). The flanged hole is used to connect the capillary tube (2).

17. An air conditioning system, characterized in that: Includes the directional valve (1) as described in any one of claims 1-16.

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