Valve core structure and reversing valve

Abstract

A valve core structure (10) and a reversing valve (100). The valve core structure (10) comprises two valve core units (11) arranged separately, the two valve core units (11) being connected to each other. Each valve core unit (11) is provided with a first branch channel (111) and a second branch channel (112), the two first branch channels (111) enclosing to form a first flow channel (101), and the two second branch channels (112) enclosing to form a second flow channel (102).

Description

Valve core structure and reversing valve

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202411095880.5, filed on August 9, 2024, and entitled "Valve core structure and reversing valve", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of fluid control, and in particular, to a valve core structure and a reversing valve. BACKGROUND

[0004] At present, in a vehicle air conditioning system, a rotary reversing valve is often used to adjust the flow direction of refrigerant, so as to realize the switching between the cooling mode and the heating mode of the air conditioning system.

[0005] The reversing valve in the related art comprises 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, so as to realize 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. SUMMARY

[0006] According to various embodiments of the present application, a valve core structure and a reversing valve are provided.

[0007] The present application provides a valve core structure 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 comprises two valve core units arranged in two parts and connected to each other. Each valve core unit is provided with a first branch channel and a second branch channel. The two first branch channels surround the first flow channel, and the two second branch channels surround the second flow channel.

[0008] In one embodiment, the two valve core units are symmetrically arranged relative to the connecting surface.

[0009] In one embodiment, the first branch channel and the second branch channel each comprise a first straight section, a second straight section, and a transition section connecting the first straight section and the second straight section. The first straight section and the second straight section are arranged at two ends of the first branch channel. The first straight section and the second straight section each extend in a straight line.

[0010] In one embodiment, the axis of the first straight section on the first branch channel and the axis of the first straight section on the second branch channel are coaxially arranged. The axis of the second straight section on the first branch channel and the axis of the second straight section on the second branch channel are coaxially arranged. The axis of the first straight section is perpendicular to the axis of the second straight section.

[0011] In one of the embodiments, the transition section comprises a third straight section, a first arc section and a second arc section, one end of the third straight section is connected to and communicates with the first straight section through the first arc section, and the other end is connected to and communicates with the second straight section through the second arc section; wherein the first arc section and the second arc section extend in an arc shape, and the third straight section extends in a straight line.

[0012] In one of the embodiments, the first arc section is smoothly connected to the first straight section and the third straight section respectively; and / or, the second arc section is smoothly connected to the second straight section and the third straight section respectively.

[0013] In one of the embodiments, the second branch and the first branch are symmetrically arranged relative to the axis of the valve core unit.

[0014] In one of the embodiments, positioning holes are formed in both of the valve core units, and the valve core structure further comprises a positioning column, two ends of the positioning column are respectively inserted into the positioning holes; or, one of the 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.

[0015] In one of the embodiments, the contact surfaces of the two valve core units are coated with solder paste.

[0016] In one of the embodiments, support rods are connected to the valve core units, and the support rods are used for positioning the valve core structure; wherein the two support rods on the two valve core units are coaxially arranged.

[0017] In one of the embodiments, the valve core unit and the support rod are of an integrated structure.

[0018] In one of the embodiments, the valve core structure is in a cylindrical or ellipsoidal shape.

[0019] The application further provides a reversing valve, which comprises a valve body and the valve core structure of any one of the above embodiments, the valve body is provided with a valve cavity and a plurality of valve holes, and the valve core structure is rotatably arranged in the valve cavity and used for communicating different valve holes.

[0020] Details of one or more embodiments of the application are presented in the accompanying drawings and description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0021] For a better understanding of the embodiments and / or examples of the inventions disclosed herein, reference can be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered limiting to the scope of any of the disclosed inventions, the presently described embodiments and / or examples, and the best mode presently contemplated of those inventions.

[0022] Fig. 1 is a sectional view of a reversing valve according to an embodiment of the present application.

[0023] Fig. 2 is an exploded view of a spool structure according to an embodiment of the present application.

[0024] Fig. 3 is a top view of a spool unit according to an embodiment of the present application.

[0025] Fig. 4 is an exploded view of a spool structure according to another embodiment of the present application.

[0026] Fig. 5 is a sectional view of a reversing valve according to another embodiment of the present application.

[0027] The symbols in the drawings represent the following meanings: 100, reversing valve; 10, spool structure; 101, first flow passage; 102, second flow passage; 11, spool unit; 111, first branch passage; 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 passage; 113, positioning hole; 114, positioning post; 12, support rod; 13, bearing; 20, valve body; 201, valve cavity; 2011, support hole; 202, valve hole; 2021, first recess; 202a, first valve hole; 202b, second valve hole; 202c, third valve hole; 202d, fourth valve hole; 30, sealing assembly; 301, flow passage; 31, elastic member; 32, first sealing member; 3201, second recess; 33, snap ring; 34, second sealing member; 40, driving mechanism; 41, motor coil; 42, motor rotor; 50, speed reduction mechanism; 51, gear set; 52, fixed plate; 5201, through hole. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these details under appropriate circumstances. The present application is not limited to the embodiments disclosed below and can be carried out in various ways different from those described herein without departing from the scope of the present application.

[0029] It is to be noted that when a component is referred to as being "on" or "disposed on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in the description of the specification are for the purpose of illustration only and do not indicate the only position of the embodiment.

[0030] In addition, the terms "first", "second", etc. are used herein only to describe various conditions, and are not to be construed as indicating or implying relative importance or a specific number of indicated technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0031] In this application, unless otherwise explicitly specified and limited, the first feature is "on", "under" the second feature, which can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicate that the first feature is higher in horizontal height than the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicate that the first feature is lower in horizontal height than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0033] At present, in the vehicle air conditioning system, the flow direction of refrigerant is usually adjusted by using a rotary reversing valve to realize the switching of the air conditioning system between cooling mode and heating mode.

[0034] 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, and the valve core is rotatably arranged in the valve cavity to communicate 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.

[0035] Please refer to FIG. 1-5, to solve the problem that the existing valve core structure is not easy to process a smooth flow channel, 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. Among them, the reversing valve 100 also 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 arranged in the valve cavity 201 to switch the valve hole 202 corresponding to the first flow channel 101 and the second flow channel 102, so as to change the flow path and realize the conversion of refrigeration mode and heating mode.

[0036] 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 matched with the valve hole 202, and the first flow channel 101 and the second flow channel 102 are both basically arc-shaped.

[0037] Further, the valve core structure 10 provided by the present application includes two valve core units 11 arranged in a split manner, and the two valve core units 11 are connected to each other. Among them, the first branch 111 and the second branch 112 are arranged on each valve core unit 11, and the two first branches 111 are arranged to form the first flow channel 101, and the two second branches 112 are arranged to form the second flow channel 102. By arranging the valve core structure 10 in 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.

[0038] Further, in an embodiment, the two valve core units 11 are symmetrically arranged relative to the connecting surface, that is, the structures of the two valve core units 11 are basically the same, so that the processing of the valve core unit 11 is facilitated, thereby improving the overall processing efficiency.

[0039] In an embodiment, as shown in FIG. 3, the first branch 111 and the second branch 112 each 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, and the first straight section 1111 and the second straight section 1112 are respectively arranged at two ends of the first branch 111. Among them, the first straight section 1111 and the second straight section 1112 are both straight.

[0040] That is, the opening positions of the two ends of the first branch 111 are in a half straight hole shape, so that when the two first branches 111 surround the first flow channel 101, the opening positions of the two ends of the first flow channel 101 can be ensured to be in a complete straight hole shape, and at the same time, since the valve hole 202 is usually also in a straight hole shape, when the first flow channel 101 and the valve hole 202 cooperate to realize the flow of refrigerant and other media, the smooth transition at the connection between the valve hole 202 and the first flow channel 101 can be realized, which is beneficial to further reduce the pressure loss.

[0041] Specifically, in an embodiment, the axis of the first straight section 1111 on the first branch 111 and the axis of the first straight section 1111 on the second branch 112 are coaxially arranged. The axis of the second straight section 1112 on the first branch 111 and the axis of the second straight section 1112 on the second branch 112 are coaxially arranged. Wherein, the axis of the first straight section 1111 is perpendicular to the axis of the second straight section 1112.

[0042] In this way, the two ends of the first flow channel 101 and the second flow channel 102 are open to the four valve holes 202 on the valve body 20, and when matched and communicated, there is no included angle at the connection between the corresponding flow channel opening and the valve hole 202, thereby facilitating the reduction of pressure loss.

[0043] In an embodiment, as shown in FIG. 3, 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 and communicated with the first straight section 1111 through the first arc section 1113b, and the other end of the third straight section 1113a is connected and communicated with the second straight section 1112 through the second arc section 1113c. Wherein, 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.

[0044] It can be understood that if the transition section 1113 is set as an entire arc section, in order to ensure the flow area of the flow channel and the spacing width between the two flow channels, the size of the valve core structure 10 needs to be increased, which will lead to the cost of the valve core structure 10. While the embodiment can reduce the overall size of the valve core structure 10 while ensuring a larger flow area of the flow channel, thereby reducing the material cost.

[0045] Further, in an embodiment, the first arc section 1113b is smoothly connected with the first straight section 1111 and the third straight section 1113a respectively. Since the two valve core units 11 are machined separately, the machining difficulty is greatly reduced, so that the smooth transition of the internal flow channel can be realized, thereby greatly reducing the pressure loss.

[0046] In an embodiment, the second arc section 1113c is smoothly connected with the second straight section 1112 and the third straight section 1113a respectively. Similarly, in this way, the smooth transition of the internal flow channel is further realized, thereby greatly reducing the pressure loss.

[0047] In an embodiment, as shown in FIG. 3, the second branch 112 and the first branch 111 are symmetrically arranged relative to the axis of the valve core unit 11. In this way, the machining of the valve core unit 11 is facilitated.

[0048] Specifically, the first branch passage 111 and the second branch passage 112 can be axisymmetric or center symmetric. In some actual examples, the first branch passage 111 and the second branch passage 112 satisfy both axisymmetric and center symmetric.

[0049] In the embodiment, the two valve core units 11 are fixed by welding, the connection is simple, and the independence of the first flow passage 101 and the second flow passage 102 can be ensured, avoiding leakage of the refrigerant.

[0050] Further, in an embodiment, positioning holes 113 are formed in the two valve core units 11, and the valve core structure further includes positioning columns 114, both ends of the positioning columns 114 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, and mispositioning is avoided, thereby further ensuring the reliability of flow passage processing.

[0051] However, the embodiment is not limited to this, 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 column 114, the positioning column 114 is inserted into the positioning hole 113. In this way, the positioning of the two valve core units 11 before welding is facilitated, and mispositioning is avoided, thereby further ensuring the reliability of flow passage processing.

[0052] The number of positioning holes 113 can be set to multiple, thereby further improving the reliability of positioning. For example, as shown in FIG. 3, two positioning holes 113 are provided in the embodiment, and the two positioning holes 113 are radially spaced apart along 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 positioning holes 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.

[0053] In order to facilitate the welding of the two valve core units 11 and reduce the welding difficulty, in an embodiment, welding paste is coated on the contact surface of the two valve core units 11. Specifically, the two valve core units 11 are integrated by brazing.

[0054] In an embodiment, as shown in FIG. 1 and FIG. 2, a support rod 12 is connected to the valve core unit 11, and the support rod 12 is used for positioning the valve core structure 10. 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 the like through the support rod 12, thereby avoiding tilting of the valve core structure 10 during rotation, which is beneficial to reduce friction during rotation of the valve core structure 10 and reduce torque.

[0055] Further, in an embodiment, the valve core unit 11 and the support rod 12 are integrated. In this way, the connection strength of the support rod 12 can be improved to prevent the support rod 12 from breaking.

[0056] In an embodiment, as shown in FIG. 1, a sealing assembly 30 is arranged 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 of the sealing assembly 30 at least partially protrudes from the inner wall of the valve cavity 201 and movably seals against the outer wall of the valve core structure 10. In this way, the sealing assembly 30 realizes the sealing of the connection between the valve hole 202 and the valve core structure 10, which can ensure the flow of refrigerant along the predetermined flow channel between the valve hole 202 and the valve core structure 10, thereby greatly improving the use reliability of the reversing valve 100.

[0057] It can be understood that the sealing assembly 30 is provided with a flow-through hole 301 for the flow of refrigerant, and the flow-through hole 301 can be in communication with different flow channel openings on the valve core structure 10 through the rotation of the valve core structure 10, thereby realizing the smooth flow of refrigerant. In some embodiments, the inner diameters of the flow-through hole 301 and the flow channel openings are equal to improve the cooperation effect and sealing performance of the two.

[0058] To further improve the sealing effect between the sealing assembly 30 and the valve core structure 10, in an embodiment, the outer surface of the valve core structure 10 and the surface of the sealing assembly 30 close to the one end of the valve core structure 10 are arranged in the same arc shape. In this way, the valve core structure 10 and the sealing assembly 30 are easily sealed, and the rotation of the valve core structure 10 is facilitated.

[0059] In an embodiment, the sealing assembly 30 includes an elastic member 31 and a first sealing member 32, the valve hole 202 is provided with a first recess 2021 recessed away from the axis thereof, one end of the elastic member 31 is clamped in the first recess 2021, the other end of the elastic member 31 abuts against the first sealing member 32, and the elastic member 31 can exert a force on the first sealing member 32 towards the direction close to the valve core structure 10, so that the first sealing member 32 is tightly attached to the valve core structure 10. In this way, the sealing between the valve core structure 10 and the valve hole 202 is greatly improved, and even if the first sealing member 32 is worn out after long-term work, the elastic force of the elastic member 31 can be used for compensation, thereby further ensuring the good sealing effect between the first sealing member 32 and the valve core structure 10.

[0060] The flow-through hole 301 is arranged in the first sealing member 32. The elastic member 31 can be a butterfly spring, and the installation of the butterfly spring can be achieved by clamping a clasp ring 33 in the first recess 2021, and abutting the butterfly spring against the clasp ring 33, thereby realizing the stable installation of the elastic member 31. Of course, a connecting portion can be welded or integrally formed at one end of the butterfly spring, and the connecting portion is clamped into the first recess 2021 for connection, as long as the same effect can be achieved.

[0061] Further, in an embodiment, the outer wall of the first sealing member 32 is provided with a second groove 3201 which is recessed towards the direction of the axis of the first sealing member 32. The sealing assembly 30 further comprises a second sealing member 34 which is installed in the second groove 3201 and sealingly cooperates with the inner wall of the second groove 3201, and at least a part of the second sealing member 34 protrudes out of the second groove 3201 to sealingly abut against the inner wall of the valve hole 202. In this way, the second sealing member 32 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 refrigerant from the gap.

[0062] In an embodiment, as shown in FIG. 4, the valve core structure 10 is cylindrical, which is easy to process and can reduce the processing cost.

[0063] In another embodiment, as shown in FIG. 2, the valve core structure 10 is ellipsoidal, which can increase the contact area when the valve core structure 10 cooperates with the valve hole 202, i.e., increase the fitting area between the valve core structure 10 and the sealing assembly 30, thereby improving the sealing effect of the connection between the valve core structure 10 and the sealing assembly 30, and at the same time, can reduce the size of the valve core structure 10, thereby reducing the weight.

[0064] The application also provides a reversing valve 100, which comprises a valve body 20 and the 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, and the valve core structure 10 is rotatably arranged in the valve cavity 201 and used to communicate different valve holes 202.

[0065] In an embodiment, as shown in FIG. 1, the reversing valve 100 further comprises a driving mechanism 40, the driving mechanism 40 comprises a motor coil 41 and a motor rotor 42 which magnetically cooperates with the motor coil 41, the motor coil 41 is detachably sleeved outside the valve body 20, and the motor rotor 42 is installed in the valve body 20 and can rotate under the driving of the motor coil 41.

[0066] In order to improve the rotational driving force of the valve core structure 10, in an embodiment, the reversing valve 100 further comprises a speed reduction mechanism 50 to improve the torque of the valve core structure 10 through the speed reduction mechanism 50, so as to reduce the size of the motor coil 41 on the basis of ensuring the driving force of the valve core structure 10.

[0067] Specifically, the speed reduction mechanism 50 comprises a gear set 51 and a fixed plate 52, both of which are arranged in the valve cavity 201, and the gear set 51 is connected to the fixed plate 52 and detachably connected to the valve body 20 through the fixed plate 52. The valve core structure 10 is installed at one end of the fixed plate 52 away from the gear set 51 and can rotate around its axis in response to the driving of the gear set 51.

[0068] That is, the deceleration mechanism 50 is detachably connected with the valve body 20 as a whole, facilitating dismounting and mounting of the deceleration mechanism 50 as a whole, thereby facilitating adjustment of the deceleration ratio of the deceleration mechanism 50 according to actual needs.

[0069] In an embodiment, as shown in FIG. 1, the fixing 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 rods 12 on the valve core unit 11 close to the fixing plate 52 in the valve core structure 10 pass through the through hole 5201 and are in transmission cooperation with the gear set 51, and the support rods 12 on the valve core unit 11 away from the fixing plate 52 are inserted into the support hole 2011 and are in rotational connection with the support hole 2011, so as to realize fixation of the valve core structure 10 in the valve cavity 201.

[0070] In order to further improve the coaxiality of the valve core structure 10 during rotation and avoid deviation of the valve core structure 10, in an embodiment, as shown in FIG. 1, bearings 13 can be sleeved on the outer periphery of the two support rods 12.

[0071] The reversing valve 100 provided in the application is mainly applied to a vehicle air conditioning system, wherein the vehicle air conditioning system further comprises a compressor, an outside heat exchanger and an inside heat exchanger, and the reversing valve 100 is used to change the flow direction of the refrigerant flowing out of the compressor, so as to switch the cooling and heating modes of the system.

[0072] For the convenience of description, the four valve holes 202 distributed in sequence along the circumference of the valve body 20 of the reversing valve 100 are defined as a first valve hole 202a, a second valve hole 202b, a third valve hole 202c and a fourth valve hole 202d. As shown in FIG. 5, the first valve hole 202a can be connected with the second valve hole 202b through the first flow channel 101, and at this time, the third valve hole 202c can be connected with the fourth valve hole 202d through the second flow channel 102, with the rotation of the valve core structure 10. Alternatively, the first valve hole 202a is connected with the fourth valve hole 202d through the second flow channel 102, and at this time, the third valve hole 202c is connected with the second valve hole 202b through the first flow channel 101.

[0073] Here, the first valve hole 202a is connected with the outlet of the compressor, the third valve hole 202c is connected with the inlet of the compressor, the second valve hole 202b is connected with the outside heat exchanger, and the fourth valve hole 202d is connected with the inside heat exchanger.

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

[0075] When the vehicle air conditioning system is in the heating state, the high-pressure refrigerant discharged from the compressor outlet enters the second flow passage 102 from the first valve hole 202a on the reversing valve 100, then flows out from the fourth valve hole 202d and sequentially exchanges heat in the vehicle inside heat exchanger and the vehicle outside heat exchanger, and then sequentially flows out from the reversing valve 100 through the second valve hole 202b, the first flow passage 101 and the third valve hole 202c of the reversing valve 100 and enters the compressor from the inlet of the compressor.

[0076] The rotation of the valve core structure 10 is realized through the driving mechanism 40 and the speed reduction mechanism 50. Specifically, the motor coil 41 is electrified 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 correspondingly, realizing the switching of the flow path. And, 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°, so as to realize the switching of the flow passage. When the vehicle air conditioning system is switched 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.

[0077] In order to ensure the accuracy of the rotation angle of the valve core structure 10, a limiting mechanism can be arranged between the speed reduction mechanism 50 and the valve core structure 10, for example, the cooperation of the arc-shaped groove and the limiting column is used to realize the limiting.

[0078] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0079] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. A spool structure applied to a reversing valve, the spool structure having a first flow passage and a second flow passage, characterized in that, The valve core structure comprises two valve core units arranged separately, and the two valve core units are connected with 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 surround to form the first flow channel, and the two second branch channels surround to form the second flow channel.

2. The valve trim structure of claim 1, wherein, The opposite connecting surfaces of the two valve core units are symmetrically arranged.

3. The valve trim structure of claim 1, wherein, The first branch channel and the second branch channel each comprise 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 arranged at two ends of the first branch channel respectively. The first straight section and the second straight section are arranged in a straight line.

4. The valve trim structure of claim 3 wherein, The axis of the first straight section of the first branch channel and the axis of the first straight section of the second branch channel are coaxially arranged. The axis of the second straight section of the first branch channel and the axis of the second straight section of the second branch channel are coaxially arranged. The axis of the first straight section is perpendicular to the axis of the second straight section.

5. The valve trim structure of claim 3 wherein, The transition section comprises a third straight section, a first arc section, and a second arc section, one end of the third straight section is connected to and communicates with the first straight section through the first arc section, and the other end of the third straight section is connected to and communicates with the second straight section through the second arc section. The first arc section and the second arc section are arranged in an arc shape, and the third straight section is arranged in a straight line.

6. The valve trim structure of claim 5 wherein, The first arc section is smoothly and transitionally connected with the first straight section and the third straight section respectively. The second arc section is smoothly and transitionally connected with the second straight section and the third straight section respectively.

7. The valve trim structure of any one of claims 1-6, wherein, The second branch channel and the first branch channel are symmetrically arranged relative to the axis of the valve core unit.

8. The valve trim structure of claim 1, wherein, Positioning holes are arranged on the two valve core units, and the valve core structure further comprises a positioning column, two ends of the positioning column are respectively inserted into the two positioning holes. Alternatively, 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.

9. The valve trim structure of claim 1, wherein, Solder paste is coated on the contact surface of the two valve core units.

10. The valve trim structure of claim 1, wherein, Supporting rods are connected to the valve core units, and the supporting rods are used for positioning the valve core structure. The two supporting rods on the two valve core units are coaxially arranged.

11. The valve trim structure of claim 10 wherein, The valve core unit and the supporting rod are an integral structure.

12. The valve trim structure of claim 1, wherein, The valve core structure is in a cylindrical or ellipsoidal shape.

13. A reversing valve characterized by The valve core structure comprises a valve body and a valve core structure according to any one of claims 1-12, the valve body is provided with a valve cavity and a plurality of valve holes, and the valve core structure is rotatably arranged in the valve cavity and used for connecting different valve holes.

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