Valve element structure and reversing valve

Abstract

The utility model relates to the technical field of fluid control, in particular to a valve element structure and a reversing valve. The valve element structure comprises two valve element units which are arranged in a split mode, and the two valve element units are connected with each other. Wherein each valve element unit is provided with a first branch channel and a second branch channel, the two first branch channels define a first flow channel, and the two second branch channels define a second flow channel. According to the valve element structure and the reversing valve, the problem that a smooth flow channel is not easy to machine in an existing valve element structure is solved.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a valve core structure and a reversing valve. Background Art

[0002] At present, in vehicle air-conditioning systems, a rotary reversing valve is often used to adjust the flow direction of the refrigerant to achieve switching between the cooling mode and the heating mode of the air-conditioning system.

[0003] The reversing valve in the related art includes a valve body and a valve core, wherein the valve body is provided with a valve cavity and a plurality of valve holes, and the valve core is rotatably arranged in the valve cavity to connect different valve holes, thereby realizing the switching of the flow path. However, the flow channel in the existing valve core structure extends in an arc shape, which is difficult to process. Utility Model Content

[0004] Based on this, it is necessary to provide a valve core structure and a reversing valve to solve the problem that the existing valve core structure is difficult to process.

[0005] The present application provides a valve core structure, which is applied to a reversing valve. The valve core structure is provided with a first flow channel and a second flow channel. The valve core structure includes two valve core units which are separately arranged and are connected to each other. Each of the valve core units is provided with a first branch channel and a second branch channel, and the two first branch channels are arranged to form the first flow channel, and the two second branch channels are arranged to form the second flow channel.

[0006] In one embodiment, the two valve core units are symmetrically arranged relative to the connecting surface.

[0007] In one embodiment, the first branch channel and the second branch channel both include a first straight section, a second straight section, and a transition section connecting the first straight section and the second straight section, and the first straight section and the second straight section are respectively arranged at two ends of the first branch channel; wherein the first straight section and the second straight section both extend in a straight line.

[0008] In one embodiment, the axis of the first straight segment on the first branch channel is coaxially arranged with the axis of the first straight segment on the second branch channel; the axis of the second straight segment on the first branch channel is coaxially arranged with the axis of the second straight segment on the second branch channel; wherein the axis of the first straight segment is perpendicular to the axis of the second straight segment.

[0009] In one embodiment, the transition section includes a third straight section, a first arc section and a second arc section, one end of the third straight section is connected to and communicated with the first straight section via the first arc section, and the other end is connected to and communicated with the second straight section via the second arc section; wherein the first arc section and the second arc section both extend in an arc shape, and the third straight section extends in a straight line.

[0010] In one embodiment, the first arc segment is connected to the first straight segment and the third straight segment in a smooth transition; and / or the second arc segment is connected to the second straight segment and the third straight segment in a smooth transition.

[0011] In one embodiment, the second branch channel and the first branch channel are symmetrically arranged relative to the axis of the valve core unit.

[0012] In one of the embodiments, both valve core units are provided with positioning holes, and the valve core structure also includes a positioning column, and both ends of the positioning column are respectively inserted into the two positioning holes; or, one of the two valve core units is provided with a positioning hole, and the other is provided with a positioning column, and the positioning column is inserted into the positioning hole.

[0013] In one of the embodiments, solder paste is coated on the contact surfaces of the two valve core units.

[0014] In one of the embodiments, a support rod is connected to the valve core unit, and the support rod is used to position the valve core structure; wherein the two support rods on the two valve core units are coaxially arranged.

[0015] In one embodiment, the valve core unit and the support rod are an integrated structure.

[0016] In one embodiment, the valve core structure is cylindrical or ellipsoidal.

[0017] The present application also provides a reversing valve, which includes a valve body and a valve core structure as described in any one of the above embodiments, wherein the valve body is provided with a valve cavity and a plurality of valve holes, and the valve core structure is rotatably disposed in the valve cavity for connecting different valve holes.

[0018] Compared with the prior art, the valve core structure and the reversing valve provided in the present application facilitate the processing of the first flow channel and the second flow channel on the valve core structure by configuring the valve core structure as a split structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A cross-sectional view of a reversing valve according to an embodiment of the present application;

[0021] Figure 2 An exploded view of a valve core structure according to an embodiment of the present application;

[0022] Figure 3 A top view of a valve core unit according to an embodiment of the present application;

[0023] Figure 4 An exploded view of a valve core structure according to another embodiment of the present application;

[0024] Figure 5 A cross-sectional view from another direction of a reversing valve according to an embodiment of the present application.

[0025] The symbols in the figure mean the following:

[0026] 100, reversing valve; 10, valve core structure; 101, first flow channel; 102, second flow channel; 11, valve core unit; 111, first branch channel; 1111, first straight section; 1112, second straight section; 1113, transition section; 1113a, third straight section; 1113b, first arc section; 1113c, second arc section; 112, second branch channel; 113, positioning hole; 12, support rod; 13, bearing; 20, valve body; 201, valve cavity; 2011, support hole; 2 02, valve hole; 2021, first groove; 202a, first valve hole; 202b, second valve hole; 202c, third valve hole; 202d, fourth valve hole; 30, sealing assembly; 301, flow hole; 31, elastic member; 32, first sealing member; 3201, second groove; 33, retaining ring; 34, second sealing member; 40, driving mechanism; 41, motor coil; 42, motor rotor; 50, reduction mechanism; 51, gear set; 52, fixing plate; 5201, through hole. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0032] At present, in vehicle air-conditioning systems, a rotary reversing valve is often used to adjust the flow direction of the refrigerant to achieve switching between the cooling mode and the heating mode of the air-conditioning system.

[0033] The reversing valve in the related art includes a valve body and a valve core. The valve body is provided with a valve cavity and a plurality of valve holes. The valve core is rotatably arranged in the valve cavity to connect different valve holes, thereby realizing the switching of the flow path. However, the flow channel in the existing valve core structure extends in an arc shape, and it is difficult to process a smooth flow channel, which leads to a large pressure drop of the fluid in the low-pressure flow channel, thereby generating a large pressure loss.

[0034] See also Figure 1-Figure 5In order to solve the problem that it is difficult to process a smooth flow channel in the existing valve core structure, the present application provides a valve core structure 10, which is applied to a reversing valve 100, and the valve core structure 10 is provided with a first flow channel 101 and a second flow channel 102. The reversing valve 100 further includes a valve body 20 provided with a valve cavity 201 and a plurality of valve holes 202, and the valve core structure 10 is rotatably disposed in the valve cavity 201 to switch the valve holes 202 corresponding to the first flow channel 101 and the second flow channel 102, thereby changing the flow path and realizing the conversion between the cooling mode and the heating mode.

[0035] Specifically, the valve body 20 of the present application is provided with four valve holes 202, and the four valve holes 202 are distributed in a cross shape. Similarly, the two openings of the first flow channel 101 and the two openings of the second flow channel 102 are distributed in a cross shape adapted to the valve holes 202, and the first flow channel 101 and the second flow channel 102 are both substantially extended in an arc shape.

[0036] Furthermore, the valve core structure 10 provided in the present application includes two valve core units 11 that are separately arranged, and the two valve core units 11 are connected to each other. Each valve core unit 11 is provided with a first branch channel 111 and a second branch channel 112, and the two first branch channels 111 are arranged to form a first flow channel 101, and the two second branch channels 112 are arranged to form a second flow channel 102. By setting the valve core structure 10 as a split structure, the processing of the first flow channel 101 and the second flow channel 102 on the valve core structure 10 is facilitated.

[0037] Furthermore, in one embodiment, the two valve core units 11 are symmetrically arranged relative to the connection surface, that is, the structures of the two valve core units 11 are basically the same, which facilitates the processing of the valve core units 11 and can improve the overall processing efficiency.

[0038] In one embodiment, if Figure 3 As shown, the first branch channel 111 and the second branch channel 112 both include a first straight section 1111, a second straight section 1112, and a transition section 1113 connecting the first straight section 1111 and the second straight section 1112. The first straight section 1111 and the second straight section 1112 are respectively arranged at two ends of the first branch channel 111. The first straight section 1111 and the second straight section 1112 both extend in a straight line.

[0039] That is, the opening positions at both ends of the first branch channel 111 are in the shape of semi-straight holes. In this way, when the two first branch channels 111 surround the first flow channel 101, it can be ensured that the opening positions at both ends of the first flow channel 101 are in the shape of complete straight holes. At the same time, since the valve hole 202 is usually also in the shape of a straight hole, when the first flow channel 101 and the valve hole 202 cooperate to realize the circulation of refrigerant and other media, a smooth transition can be achieved at the connection between the valve hole 202 and the first flow channel 101, which is conducive to further reducing the pressure loss.

[0040] Specifically, in one embodiment, the axis of the first straight section 1111 on the first branch channel 111 is coaxially arranged with the axis of the first straight section 1111 on the second branch channel 112. The axis of the second straight section 1112 on the first branch channel 111 is coaxially arranged with the axis of the second straight section 1112 on the second branch channel 112. The axis of the first straight section 1111 is perpendicular to the axis of the second straight section 1112.

[0041] In this way, the openings at both ends of the first flow channel 101 and the second flow channel 102 can be directly opposite to the four valve holes 202 on the valve body 20, and when they are connected together, there is no angle at the connection between the corresponding flow channel openings and the valve holes 202, which is beneficial to reduce pressure loss.

[0042] In one embodiment, if Figure 3 As shown, the transition section 1113 includes a third straight section 1113a, a first arc section 1113b and a second arc section 1113c, one end of the third straight section 1113a is connected to and communicates with the first straight section 1111 through the first arc section 1113b, and the other end is connected to and communicates with the second straight section 1112 through the second arc section 1113c. The first arc section 1113b and the second arc section 1113c both extend in an arc shape, and the third straight section 1113a extends in a straight line.

[0043] It is understandable that if the transition section 1113 is set as a whole arc section, in order to ensure the flow area of ​​the flow channel and the interval width between the two flow channels, the size of the valve core structure 10 needs to be increased, which will lead to an increase in the cost of the valve core structure 10. However, in this embodiment, by setting the middle part of the transition section 1113 as a straight section, the overall size of the valve core structure 10 can be reduced while ensuring a larger flow area of ​​the flow channel, thereby reducing material costs.

[0044] Furthermore, in one embodiment, the first arc segment 1113b is smoothly connected to the first straight segment 1111 and the third straight segment 1113a. Since the two valve core units 11 are processed separately, the processing difficulty is greatly reduced, so that the smooth transition of the internal flow channel can be achieved, thereby greatly reducing the pressure loss.

[0045] In one embodiment, the second arc segment 1113c is connected to the second straight segment 1112 and the third straight segment 1113a in a smooth transition. Similarly, such an arrangement further realizes a smooth transition of the internal flow channel, thereby greatly reducing the pressure loss.

[0046] In one embodiment, if Figure 3 As shown, the second branch channel 112 and the first branch channel 111 are symmetrically arranged relative to the axis of the valve core unit 11. In this way, the processing of the valve core unit 11 is facilitated.

[0047] Specifically, the first branch channel 111 and the second branch channel 112 may be axially symmetrical or centrally symmetrical. The first branch channel 111 and the second branch channel 112 preferably satisfy both axial symmetry and central symmetry.

[0048] In this embodiment, the two valve core units 11 are fixed by welding, which is simple to connect and can ensure the independence of the first flow channel 101 and the second flow channel 102, thereby preventing the refrigerant from leaking and connecting.

[0049] Furthermore, in one embodiment, positioning holes 113 are provided on the two valve core units 11, and the valve core structure further includes positioning posts (not shown), and the two ends of the positioning posts are respectively inserted into the two positioning holes 113. In this way, the positioning of the two valve core units 11 before welding is facilitated to avoid misalignment, thereby further ensuring the reliability of the flow channel processing.

[0050] However, it is not limited thereto, in another embodiment, one of the two valve core units 11 is provided with a positioning hole 113, and the other is provided with a positioning post, which is inserted into the positioning hole 113. In this way, the positioning of the two valve core units 11 before welding is facilitated to avoid misalignment, thereby further ensuring the reliability of the flow channel processing.

[0051] The number of the positioning holes 113 can be set to be multiple, so as to further improve the reliability of positioning. Figure 3 As shown, in this embodiment, two positioning holes 113 are specifically provided, and the two positioning holes 113 are spaced apart in the radial direction of the valve core unit 11. Of course, one, three or more positioning holes 113 can also be provided according to actual needs. When the number of the positioning hole 113 is one, the positioning hole 113 can be provided as a polygonal structure to prevent relative rotation between the positioning hole 113 and the positioning column.

[0052] To facilitate welding of the two valve core units 11 and reduce welding difficulty, in one embodiment, solder paste is coated on the contact surfaces of the two valve core units 11. Specifically, the two valve core units 11 are integrated by brazing.

[0053] In one embodiment, if Figure 1 and Figure 2 As shown, the valve core unit 11 is connected with a support rod 12, and the support rod 12 is used to position the valve core structure 10. Among them, the two support rods 12 on the two valve core units 11 are coaxially arranged. In this way, the valve core structure 10 can be connected to the valve body 20 and other structures through the support rod 12, so as to avoid the valve core structure 10 from tilting when rotating, which is conducive to reducing the friction and torque during the rotation of the valve core structure 10.

[0054] Furthermore, in one embodiment, the valve core unit 11 and the support rod 12 are an integrated structure, so that the connection strength of the support rod 12 can be improved and the support rod 12 can be prevented from breaking.

[0055] In one embodiment, if Figure 1 As shown, a sealing assembly 30 is provided in the valve hole 202, one end of the sealing assembly 30 is limitedly connected to the inner wall of the valve hole 202, and the other end at least partially protrudes from the inner wall of the valve cavity 201 and is movably sealed against the outer wall of the valve core structure 10. In this way, the sealing of the connection between the valve hole 202 and the valve core structure 10 is achieved through the sealing assembly 30, which can ensure that the refrigerant flows between the valve hole 202 and the valve core structure 10 along the predetermined flow channel, thereby greatly improving the reliability of the reversing valve 100.

[0056] It is understandable that the sealing assembly 30 is provided with a flow hole 301 for the circulation of the refrigerant, and as the valve core structure 10 rotates, the flow hole 301 can be connected with different flow channel openings on the valve core structure 10, thereby achieving smooth flow of the refrigerant. In this embodiment, the inner diameters of the flow hole 301 and the flow channel opening are preferably set to be equal to each other, so as to improve the matching effect and sealing performance of the two.

[0057] In order to further improve the sealing effect between the sealing component 30 and the valve core structure 10, in one embodiment, the outer surface of the valve core structure 10 and the surface of the sealing component 30 close to one end of the valve core structure 10 are arranged in an arc shape with the same arc. In this way, the valve core structure 10 and the sealing component 30 are convenient for fitting and sealing, and the rotation of the valve core structure 10 is also facilitated.

[0058] In one embodiment, the sealing assembly 30 includes an elastic member 31 and a first sealing member 32. A first groove 2021 is provided in the valve hole 202, which is recessed in a direction away from the axis of the valve hole 202. One end of the elastic member 31 is clamped in the first groove 2021, and the other end is abutted against the first sealing member 32. In addition, the elastic member 31 can exert a force on the first sealing member 32 in a direction close to the valve core structure 10, so that the first sealing member 32 fits tightly with the valve core structure 10. In this way, the sealing performance between the valve core structure 10 and the valve hole 202 is greatly improved. In addition, even if the first sealing member 32 is worn after long-term operation, the elastic force of the elastic member 31 can be used to compensate for the wear, further ensuring a good sealing effect between the first sealing member 32 and the valve core structure 10.

[0059] The flow hole 301 is provided in the first sealing member 32. The elastic member 31 may be a butterfly spring, and the butterfly spring may be installed by setting a snap ring 33 to be clamped in the first groove 2021, and the butterfly spring is pressed against the snap ring 33, so as to achieve stable installation of the elastic member 31. Of course, a connection part may be welded or integrally formed at one end of the butterfly spring, and the connection part may be clamped in the first groove 2021 for connection, as long as the same effect can be achieved.

[0060] Furthermore, in one embodiment, the outer wall of the first sealing member 32 is provided with a second groove 3201 that is recessed toward the direction close to the axis thereof. The sealing assembly 30 further includes a second sealing member 34, which is installed in the second groove 3201 and seals with the inner wall of the second groove 3201, and at least a portion of the second sealing member 34 protrudes from the second groove 3201 to seal against the inner wall of the valve hole 202. In this way, the second sealing member 34 can seal the gap between the first sealing member 32 and the inner wall of the valve hole 202, thereby greatly reducing the probability of leakage of the refrigerant from the gap.

[0061] In one embodiment, if Figure 4 As shown, the valve core structure 10 is cylindrical, which is easy to process and can reduce the processing cost.

[0062] In another embodiment, if Figure 2 As shown, the valve core structure 10 is ellipsoidal, so that the contact area between the valve core structure 10 and the valve hole 202 can be increased, that is, the fitting area between the valve core structure 10 and the sealing assembly 30 is increased, thereby improving the sealing effect of the connection between the two, and at the same time, the size of the valve core structure 10 can be reduced, thereby reducing the weight.

[0063] The present application also provides a reversing valve 100 , which includes a valve body 20 and a valve core structure 10 of any one of the above embodiments. The valve body 20 is provided with a valve cavity 201 and a plurality of valve holes 202 . The valve core structure 10 is rotatably disposed in the valve cavity 201 for connecting different valve holes 202 .

[0064] In one embodiment, if Figure 1 As shown, the reversing valve 100 also includes a driving mechanism 40, which includes a motor coil 41 and a motor rotor 42 magnetically matched with the motor coil 41. The motor coil 41 is detachably mounted on the outside of the valve body 20, and the motor rotor 42 is installed in the valve body 20 and can rotate under the drive of the motor coil 41.

[0065] In order to increase the rotational driving force of the valve core structure 10, in one embodiment, the reversing valve 100 also includes a speed reduction mechanism 50 to increase the torque of the valve core structure 10 through the speed reduction mechanism 50. In this way, the size of the motor coil 41 can be reduced while ensuring the driving force of the valve core structure 10.

[0066] Specifically, the speed reduction mechanism 50 includes a gear set 51 and a fixing plate 52, both of which are arranged in the valve cavity 201, and the gear set 51 is connected to the fixing plate 52 and is detachably connected to the valve body 20 through the fixing plate 52. The valve core structure 10 is installed at one end of the fixing plate 52 away from the gear set 51, and can rotate around its own axis in response to the drive of the gear set 51.

[0067] That is, the speed reduction mechanism 50 as a whole is detachably connected to the valve body 20, which facilitates the disassembly and installation of the speed reduction mechanism 50 as a whole, thereby facilitating the adjustment of the speed reduction ratio of the speed reduction mechanism 50 according to actual needs.

[0068] In one embodiment, if Figure 1 As shown, the fixed plate 52 is provided with a through hole 5201, the inner wall of the valve cavity 201 is provided with a support hole 2011, and the through hole 5201 and the support hole 2011 are coaxially arranged, and the support rod 12 on the valve core unit 11 on the side close to the fixed plate 52 in the valve core structure 10 passes through the through hole 5201 and is matched with the gear set 51 for transmission, and the support rod 12 on the valve core unit 11 on the side away from the fixed plate 52 is inserted into the support hole 2011 and is rotatably connected to the support hole 2011, thereby realizing the fixation of the valve core structure 10 in the valve cavity 201.

[0069] In order to further improve the coaxiality of the valve core structure 10 during rotation and avoid the valve core structure 10 from deflecting, in one embodiment, as shown in FIG. Figure 1 As shown, bearings 13 may be sleeved on the outer circumferences of the two support rods 12 .

[0070] The reversing valve 100 provided in the present application is mainly used in a vehicle air-conditioning system, wherein the vehicle air-conditioning system also includes a compressor, an outdoor heat exchanger and an indoor heat exchanger. The reversing valve 100 is used to change the flow direction of the refrigerant flowing out of the compressor to switch the cooling and heating modes of the system.

[0071] For ease of description, the present application defines the four valve holes 202 distributed in the circumferential direction on the valve body 20 of the reversing valve 100 as the first valve hole 202a, the second valve hole 202b, the third valve hole 202c and the fourth valve hole 202d. Figure 5 As shown, the first valve hole 202a can be connected to the second valve hole 202b through the first flow channel 101, and at this time, the third valve hole 202c can be connected to the fourth valve hole 202d through the second flow channel 102. Alternatively, the first valve hole 202a is connected to the fourth valve hole 202d through the second flow channel 102, and at this time, the third valve hole 202c can be connected to the second valve hole 202b through the first flow channel 101.

[0072] Here, the first valve hole 202a is connected to the outlet of the compressor, the third valve hole 202c is connected to the inlet of the compressor, the second valve hole 202b is connected to the outdoor heat exchanger, and the fourth valve hole 202d is connected to the indoor heat exchanger.

[0073] When the vehicle air-conditioning system is in the cooling state, the high-pressure refrigerant discharged from the compressor outlet enters the first flow channel 101 from the first valve hole 202a on the reversing valve 100, then flows out from the second valve hole 202b and exchanges heat in the outdoor heat exchanger and the indoor heat exchanger in turn, then flows out of the reversing valve 100 through the fourth valve hole 202d, the second flow channel 102, and the third valve hole 202c of the reversing valve 100 and enters the compressor from the compressor inlet.

[0074] When the vehicle air-conditioning system is in the heating state, the high-pressure refrigerant discharged from the compressor outlet enters the second flow channel 102 from the first valve hole 202a on the reversing valve 100, then flows out from the fourth valve hole 202d and exchanges heat in the in-vehicle heat exchanger and the out-vehicle heat exchanger in turn, then flows out of the reversing valve 100 through the second valve hole 202b, the first flow channel 101, and the third valve hole 202c of the reversing valve 100 and enters the compressor from the compressor inlet.

[0075] The rotation of the valve core structure 10 is realized by the driving mechanism 40 and the speed reduction mechanism 50. Specifically, the motor coil 41 is energized to drive the motor rotor 42 to rotate clockwise or counterclockwise. At this time, the output shaft of the motor rotor 42 can drive the gear set 51 to rotate, thereby driving the valve core structure 10 to rotate accordingly, thereby realizing the switching of the flow path. In addition, the position of the valve core structure 10 when the vehicle air conditioning system is in the cooling state is defined as the initial position of the valve core structure 10. When the vehicle air conditioning system is switched to the heating state, since the two adjacent valve holes 202 are vertically arranged, the driving mechanism 40 and the speed reduction mechanism 50 only need to drive the valve core structure 10 to rotate 90° to realize the switching of the flow path. When the vehicle air conditioning system switches back to the cooling state, the driving mechanism 40 and the speed reduction mechanism 50 control the valve core structure 10 to rotate 90°, so as to control the valve core structure 10 to return to the initial position.

[0076] In order to ensure the accuracy of the rotation angle of the valve core structure 10, a limiting mechanism may be provided between the speed reduction mechanism 50 and the valve core structure 10, for example, the limiting mechanism may be achieved by the cooperation of an arc groove and a limiting column.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A valve core structure, used in a reversing valve, wherein the valve core structure is provided with a first flow channel (101) and a second flow channel (102), and is characterized in that: The valve core structure comprises two valve core units (11) which are separately arranged, and the two valve core units (11) are connected to each other; Each of the valve core units (11) is provided with a first branch channel (111) and a second branch channel (112), and the two first branch channels (111) are arranged to form the first flow channel (101), and the two second branch channels (112) are arranged to form the second flow channel (102).

2. The valve core structure according to claim 1, characterized in that: The two valve core units (11) are symmetrically arranged relative to the connection surface.

3. The valve core structure according to claim 1, characterized in that: The first branch channel (111) and the second branch channel (112) both comprise a first straight section (1111), a second straight section (1112) and a transition section (1113) connecting the first straight section (1111) and the second straight section (1112), and the first straight section (1111) and the second straight section (1112) are respectively arranged at two ends of the first branch channel (111); Wherein, the first straight section (1111) and the second straight section (1112) both extend in a straight line.

4. The valve core structure according to claim 3, characterized in that: The axis of the first straight section (1111) on the first branch channel (111) and the axis of the first straight section (1111) on the second branch channel (112) are coaxially arranged; The axis of the second straight section (1112) on the first branch channel (111) and the axis of the second straight section (1112) on the second branch channel (112) are coaxially arranged; Wherein, the axis of the first straight segment (1111) is perpendicular to the axis of the second straight segment (1112).

5. The valve core structure according to claim 3, characterized in that: The transition section (1113) comprises a third straight section (1113a), a first arc section (1113b) and a second arc section (1113c); one end of the third straight section (1113a) is connected to and communicates with the first straight section (1111) via the first arc section (1113b), and the other end of the third straight section (1113a) is connected to and communicates with the second straight section (1112) via the second arc section (1113c); The first arc segment (1113b) and the second arc segment (1113c) both extend in an arc shape, and the third straight segment (1113a) extends in a straight line.

6. The valve core structure according to claim 5, characterized in that: The first arc segment (1113b) is smoothly transitionally connected to the first straight segment (1111) and the third straight segment (1113a); And / or, the second arc segment (1113c) is smoothly transitionally connected to the second straight segment (1112) and the third straight segment (1113a) respectively.

7. The valve core structure according to any one of claims 1 to 6, characterized in that: The second branch channel (112) and the first branch channel (111) are symmetrically arranged relative to the axis of the valve core unit (11).

8. The valve core structure according to claim 1, characterized in that: The two valve core units (11) are each provided with a positioning hole (113), and the valve core structure further comprises a positioning column, and two ends of the positioning column are respectively inserted into the two positioning holes (113); Alternatively, one of the two valve core units (11) is provided with a positioning hole (113), and the other is provided with a positioning column, and the positioning column is inserted into the positioning hole (113).

9. The valve core structure according to claim 1, characterized in that: Solder paste is coated on the contact surfaces of the two valve core units (11).

10. The valve core structure according to claim 1, characterized in that: The valve core unit (11) is connected to a support rod (12), and the support rod (12) is used for positioning the valve core structure; Wherein, the two support rods (12) on the two valve core units (11) are coaxially arranged.

11. The valve core structure according to claim 10, characterized in that: The valve core unit (11) and the support rod (12) are an integrated structure.

12. The valve core structure according to claim 1, characterized in that: The valve core structure is cylindrical or ellipsoidal.

13. A reversing valve, characterized in that: It comprises a valve body (20) and a valve core structure as claimed in any one of claims 1 to 12, wherein the valve body (20) is provided with a valve cavity (201) and a plurality of valve holes (202), and the valve core structure is rotatably arranged in the valve cavity (201) for connecting different valve holes (202).

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