Valve device

Abstract

The invention provides a valve device which comprises a valve body and a valve element, the valve device is provided with a valve cavity, the valve element is provided with a communicating channel, the communicating channel is provided with a first port and a second port, in the axial direction of the valve element, the first port is located at one end of the valve element, and the second port is located on the periphery of the valve element; in the axial direction of the valve device, the valve element is located on one side of the bearing, and the supporting part is located on the other side of the bearing. The supporting part is provided with a first flow channel, and the first flow channel communicates with the first port; the bearing comprises at least two rolling pieces, the rolling pieces are distributed in the circumferential direction of the valve device at intervals, in the axial direction of the valve device, one side of each rolling piece abuts against the valve element, and the other side of each rolling piece abuts against the supporting part. According to the scheme, deflection of the valve element can be reduced, and the risk that the valve element is stuck is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valve devices, and in particular to a valve device. Background Art

[0002] The valve device includes a valve core ball and a valve body. The valve core ball is located in the valve cavity of the valve body. One end of the valve core ball is connected to the valve stem, and the valve stem drives the valve core ball to rotate. During the operation of the valve core ball, it may deflect, which may cause the valve core ball to get stuck. Summary of the invention

[0003] The purpose of the present application is to provide a valve device that can reduce the risk of valve core getting stuck.

[0004] The valve device provided in the present application includes a valve body and a valve core, the valve device has a valve cavity, the valve core has a connecting channel, the connecting channel has a first port and a second port, along the axial direction of the valve core, the first port is located at one end of the valve core, and the second port is located at the outer periphery of the valve core; the valve device also includes a bearing and a support portion, along the axial direction of the valve device, the valve core is located on one side of the bearing, and the support portion is located on the other side of the bearing; the support portion has a first flow channel, and the first flow channel is connected to the first port; the bearing includes at least two rolling elements, each of which is spaced apart along the circumference of the valve device, and along the axial direction of the valve device, one side of the rolling element abuts against the valve core, and the other side of the rolling element abuts against the support portion.

[0005] In the present application, the bearing includes at least two rolling elements, each of which is spaced along the circumference of the valve device. Along the axial direction of the valve device, one side of the rolling element abuts against the valve core, and the other side of the rolling element abuts against the support portion. The rolling element and the valve core maintain contact to reduce the deflection of the valve core; moreover, when the valve core rotates, the contact between the rolling element and the valve core is rolling contact, which can reduce friction, thereby reducing the risk of the valve core being stuck while limiting the valve core to reduce the deflection of the valve core. In addition, the support portion has a first flow channel, which can not only support the rolling element, but also be used to connect the first port and the first channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of a valve device in an embodiment of the present application;

[0007] Figure 2 for Figure 1 The main view;

[0008] Figure 3 for Figure 2 Middle AA section view;

[0009] Figure 4 for Figure 1Left view of

[0010] Figure 5 for Figure 4 Middle BB section view;

[0011] Figure 6 for Figure 3 Schematic diagram of the middle valve core;

[0012] Figure 7 for Figure 6 Schematic diagram of the middle valve core from another perspective;

[0013] Figure 8 for Figure 3 Schematic diagram of the structure of the middle bearing;

[0014] Fig. 9 for Figure 8 Schematic diagram of another view of the middle bearing;

[0015] Fig.10 for Figure 3 A schematic diagram of the structure of the middle support portion;

[0016] Fig.11 for Fig.10 A schematic diagram of the middle support portion from another perspective;

[0017] Fig.12 for Figure 3 Schematic diagram of the structure of the medium wave spring;

[0018] Fig.13 for Fig.12 Schematic diagram of another perspective of the medium wave spring;

[0019] Fig.14 for Figure 3 A magnified view of the center bearing position;

[0020] Fig.15 for Figure 2 The CC section view shows that the valve device is in the first working condition.

[0021] Fig.16 for Figure 2 The CC section view shows that the valve device is in the second working condition.

[0022] Figure 1-16 The following are the descriptions of the reference numerals:

[0023] 1-control component; 11, stator; 12, housing; 13, electric control board;

[0024] 2- rotor assembly; 21- rotor; 22- transmission gear;

[0025] 3-valve stem;

[0026] 4-valve body; 41-valve body; 42-cover; 4a-first channel; 4b-second channel; 4c-third channel; 4d-valve cavity; 4e-installation groove; 4f-fourth channel;

[0027] 5-valve core; 51-communication channel; 511-first port; 512-second port; 52-lower end surface; 53-boss; 54-limiting groove; 55-expansion groove;

[0028] 6-bearing; 61-bearing frame; 62-rolling element; 63-third flow channel;

[0029] 7-supporting portion; 71-first flow channel; 72-second through hole; 73-annular groove;

[0030] 8-elastic portion; 81-second flow channel;

[0031] 9-valve seat;

[0032] 110 - sensor;

[0033] 120-Heat exchanger. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Please refer to Figures 1 to 5 , Figure 1 A schematic diagram of a valve device in an embodiment of the present application; Figure 2 for Figure 1 The main view of Figure 3 for Figure 2 Middle AA section view; Figure 4 for Figure 1 Left view of; Figure 5 for Figure 4 Middle BB section view.

[0036] like Figure 3 As shown, the valve device in this embodiment includes a valve body 4 and a valve core 5. The valve device has a valve cavity 4d. Specifically, the valve body 4 has a valve cavity 4d and a first channel 4a, a second channel 4b and a third channel 4c connected to the valve cavity 4d. Figure 3From a perspective, at least part of the first channel 4a extends axially, and at least part of the second channel 4b and at least part of the third channel 4c extend radially, that is, three channels are dispersed around the valve cavity 4d, and a three-way valve with adjustable passage is formed in cooperation with the valve core 5. The valve core 5 is installed in the valve cavity 4d. In this embodiment, the valve device further includes a valve seat 9, which is located in the valve cavity 4d and fixed to the valve body 4. The valve seat 9 is provided with a matching surface. When the valve core 5 is installed in the valve cavity 4d, the matching surface of the valve seat 9 abuts and matches with the outer surface of the valve core 5, thereby performing preliminary axial and radial limiting on the valve core 5 to only allow the valve core 5 to rotate axially.

[0037] The valve core 5 can rotate around the rotation axis, and the axial direction of the valve device is parallel to the extending direction of the rotation axis of the valve core 5. In this embodiment, the valve core is spherical.

[0038] like Figure 1 As shown, the valve device also includes a valve stem 3, a control assembly 1 and a rotor assembly 2. The rotor assembly 2 includes a rotor 21 and a transmission gear 22. The control assembly 1 includes a coil. The rotor 21 rotates under the action of the control assembly 1 and is connected to the valve stem 3 through the transmission gear 22, thereby driving the valve stem 3 to rotate axially. The valve stem 3 is connected to the valve core 5 in a transmission manner, so that the valve stem 3 can drive the valve core 5 to rotate. Specifically, as Figure 6 As shown, Figure 6 for Figure 3 The schematic diagram of the valve core 5 in FIG. 1 shows a valve core 5, wherein one end of the valve core 5 facing the valve stem 3 is provided with a limiting groove 54, which is the upper end of the valve core 5. Figure 3 As shown, the control assembly 1 is located at the upper end of the valve device in the axial direction, and the valve body 4 is located at the lower end of the valve core 5. This is used as a standard to define the up and down directions. Obviously, this does not mean that the valve device must be Figure 3 The valve device is placed in the upper and lower perspectives shown in the figure. During use, the valve device can also be placed horizontally, inverted or in other directions. The lower end of the valve stem 3 can be inserted into the limit groove 54, so that the valve stem 3 and the valve core 5 can be connected in a transmission manner. Figure 6 In the figure, two bosses 53 are arranged on the upper end of the valve core 5, and a limiting groove 54 is formed between the two bosses 53. The two opposite side walls of the limiting groove 54 are relatively parallel. When the lower end of the valve stem 3 is inserted into the limiting groove 54, it interferes with the side walls on both sides. When the valve stem 3 rotates, the valve core 5 can also be driven to rotate.

[0039] In addition, combined Figure 3 , 5 as well as Figure 7 understand, Figure 7 for Figure 6 Schematic diagram of the middle valve core 5 from another perspective.

[0040] The valve core 5 in this embodiment has a communication channel 51, and the communication channel 51 has a first port 511 and a second port 512. The first port 511 is located at one end of the valve core 5 in the axial direction, specifically at Figure 3 The lower end of the valve core 5, that is, a part of the communication channel 51, axially penetrates the lower end of the valve core 5, and the second port 512 of the communication channel 51 is located on the side of the valve core 5 in the radial direction, that is, a part of the communication channel 51 radially penetrates the side of the valve core 5. At this time, the first channel 4a of the valve body 4 is always connected to the first port 511, and the rotation of the valve core 5 does not affect the communication between the first channel 4a and the first port 511. Figure 3 As shown, the first channel 4a includes an axially extending portion and a radially extending portion, wherein the upper port of the axially extending portion is located below the first port 511 and remains connected to the first port 511, and a port of the second channel 4b and a port of the third channel 4c are both facing the side of the valve core 5. In this way, when the valve core 5 rotates, the second port 512 and the second channel 4b can be connected, or the second port 512 and the third channel 4c can be connected, and the first channel 4a and the second channel 4b can be connected, or the first channel 4a and the third channel 4c can be connected, thereby realizing the on-off control of the two passages in the three-way valve.

[0041] It is worth noting that the valve device in this embodiment further includes a bearing 6, a support portion 7 and an elastic portion 8, and the bearing 6, the support portion 7 and the elastic portion 8 are sequentially arranged axially between the valve core 5 and the first channel 4a, as shown in FIG. Figure 3 , 5 As shown, the bearing 6 is closest to the valve core 5 , the elastic portion 8 is located above the upper port of the first channel 4 a , and the support portion 7 is located between the bearing 6 and the elastic portion 8 .

[0042] Specifically, Figure 8 and Fig. 9 As shown, Figure 8 for Figure 3 A schematic diagram of the structure of the middle bearing 6; Fig. 9 for Figure 8 A schematic diagram of the middle bearing 6 from another perspective.

[0043] The bearing 6 in this embodiment includes a bearing frame 61 and a plurality of rolling elements 62 limited in the bearing frame 61. The bearing frame 61 is provided with a plurality of limiting holes, and the plurality of limiting holes are evenly arranged along the circumference of the bearing frame 61. The plurality of rolling elements 62 are located in the corresponding limiting holes. The rolling elements 62 can only rotate in any direction in the limiting holes, but cannot move axially or radially relative to the bearing frame 61, that is, cannot escape from the limiting holes. In addition, the rolling elements 62 of the bearing 6 are supported between the valve core 5 and the support portion 7, and the rolling elements 62 are in contact with both the valve core 5 and the support portion 7. Figure 7As shown, the valve core 5 has a lower end surface 52 , the communication channel 51 of the valve core 5 also penetrates the lower end surface 52 , and the rolling element 62 contacts the lower end surface 52 of the valve core 5 .

[0044] In addition, the bearing 6, the support portion 7, and the elastic portion 8 in this embodiment are all provided with flow channels that are interconnected, which can be defined as a third flow channel 63, a first flow channel 71, and a second flow channel 81, respectively. Figure 8 , Fig. 9 ,as well as Figure 10-13 understand, Fig.10 for Figure 3 A schematic structural diagram of the middle support portion 7; Fig.11 for Fig.10 A schematic diagram of the middle support portion 7 from another viewing angle; Fig.12 for Figure 3 A schematic structural diagram of the middle elastic portion 8; Fig.13 for Fig.12 A schematic diagram of the middle elastic portion 8 from another perspective.

[0045] It can be seen that the bearing 6, the support portion 7 and the elastic portion 8 are all annular or cylindrical structures, and their respective through holes form the third flow channel 63, the first flow channel 71 and the second flow channel 81. The third flow channel 63, the first flow channel 71 and the second flow channel 81 are arranged along the axial direction and are connected to each other. The third flow channel 63 of the bearing 6 is connected to the first port 511 of the valve core 5, and the second flow channel 81 of the elastic portion 8 is connected to the port at the upper part of the first channel 4a. In this way, when the first port 511 of the valve core 5 is connected to the first channel 4a, when the second port 512 of the valve core 5 is connected to the second channel 4b or the third channel 4c, the first channel 4a and the second channel 4b can be connected, or the first channel 4a and the third channel 4c can be connected.

[0046] So set up, such as Figure 3As shown, the elastic part 8 is located below the support part 7 and can be in a compressed state to provide an upward elastic force, that is, to provide an elastic force in the axial direction close to the valve core 5, so that the support part 7 abuts against the lower end surface 52 of the bearing 6 to the valve core 5, makes up for the gap between the bearing 6 and the valve core 5, and ensures that the rolling element 62 of the bearing 6 always keeps in contact with the valve core 5. In this way, on the one hand, under the action of the elastic part 8, the rolling element 62 and the valve core 5 keep in contact to prevent the valve core 5 from deflecting significantly. The setting of the elastic part 8 makes the limit of the rolling element 62 not affected by the deviation generated during processing and installation. On the other hand, when the valve core 5 rotates, the contact between the rolling element 62 and the valve core 5 is a rolling contact, which will not increase friction. On the premise of limiting the valve core 5 to prevent a significant deflection, it is not easy to cause the problem of jamming. In addition, compared with the direct contact between the elastic part 8 and the bearing 6, a support part 7 is further provided in the present embodiment, and the lower end face 52 of the support part 7 abuts against the elastic part 8, and the upper end face of the support part 7 abuts against the bearing 6. This can not only support the bearing 6 more stably, but also facilitate the elastic force of the elastic part 8 to be more stably transmitted to the bearing 6 along the axial direction.

[0047] like Figure 3 As shown, the valve body 4 is provided with a mounting groove 4e, which is arranged at the bottom of the valve cavity 4d and is formed by a downward depression of a portion of the bottom. The mounting groove 4e is used to install the support portion 7, and a portion of the support portion 7 is located in the mounting groove 4e to guide and limit the support portion 7. The outer wall of the support portion 7 and the side wall of the mounting groove 4e are clearance-matched, and the support portion 7 can slide axially relative to the mounting groove 4e. Under the action of the elastic portion 8, the support portion 7 can move a certain distance axially toward the direction close to the valve core 5 to drive the bearing 6 to move upward and eliminate the gap between the bearing 6 and the valve core 5. The support portion 7 can be made of stainless steel with high strength. Of course, the support portion 7 can also be made of other materials. The elastic portion 8 is also located in the mounting groove 4e, and the elastic portion 8 is located between the bottom wall of the mounting groove 4e and the support portion 7. The port of the upper part of the first channel 4a passes through the bottom wall of the mounting groove 4e, and the port of the first channel 4a is connected with the second flow channel 81. The installation groove 4e is provided as the installation position of the elastic part 8 and the support part 7, without occupying too much axial space.

[0048] Please continue to refer to Fig.11In order to better stabilize the bearing 6, in this embodiment, a groove is provided on the upper end surface of the support portion 7 facing the valve core 5, and the groove is specifically an annular groove 73. A portion of each rolling element 62 of the bearing 6 is located in the annular groove 73. However, it can be known that the groove can also be a pit. A plurality of pits are provided along the circumferential direction on the upper end surface of the support portion 7, and a portion of each rolling element 62 is located in a corresponding pit. This is also possible. However, the annular groove 73 is provided. On the one hand, the cooperation with the plurality of rolling elements 62 of the bearing 6 is not affected by processing and installation errors, nor is it affected by the number of rolling elements 62 of the bearing 6. On the other hand, during the contact and cooperation process between the bearing 6 and the valve core 5, since the rolling element 62 can move circumferentially along the annular groove 73 at the same time, during the rotation of the valve core 5, even if the friction between the valve core 5 and the rolling element 62 affects the rolling, the bearing frame 61 itself can rotate to a certain extent, which can prevent the friction between the rolling element 62 and the valve core 5 from affecting the rotation of the valve core 5.

[0049] At this time, a part of the rolling element 62 is located in the annular groove 73, so the radial position of the bearing 6 is limited and will not move in the radial direction, thereby ensuring the stability of the position in contact with the valve core 5. It should be emphasized that the bearing frame 61 and the support portion 7 in this embodiment have a gap d in the axial direction. Fig.14 As shown, Fig.14 for Figure 3 Enlarged view of the position of the middle bearing 6.

[0050] In this embodiment, a part of the rolling element 62 of the bearing 6 is located in the annular groove 73 of the support portion 7, and the bearing frame 61 itself does not contact the support portion 7, but is supported in the annular groove 73 by the rolling element 62. Since the bearing frame 61 has a limiting effect on the rolling element 62, that is, the rolling element 62 can only rotate relative to the bearing frame 61, and the spacing of multiple rolling elements 62 in the circumferential direction is fixed, in this way, only a small part of the rolling element 62 located below the bearing frame 61 needs to be located in the annular groove 73 to radially limit the rolling element 62 relative to the support portion 7, and the bearing frame 61 does not need to contact the support portion 7, and the upper end surface of the bearing frame 61 and the support portion 7 will not generate friction, and the bearing frame 61 itself can rotate relatively flexibly, so as to improve the flexibility of adjusting the position of the rolling element 62 relative to the valve core 5 and the support portion 7 in the circumferential direction.

[0051] More importantly, since the bearing frame 61 and the upper end surface of the support portion 7 facing the valve core 5 maintain a gap d, the gap d can function as a second through hole, which is beneficial to the flow of the medium. It can be understood that due to the existence of the bearing frame 61, the rolling element 62 is not easy to escape from the annular groove 73, and the rolling element 62 can be located in the annular groove 73 as little as possible to make the gap d as large as possible, thereby further facilitating the flow of the medium.

[0052] It is further understood that the portion of the rolling element 62 located in the annular groove 73 has an axial dimension that is less than half of the diameter of the rolling element 62. If a single rolling element 62 is located in the annular groove 73, then generally at least half of it needs to be located in the annular groove 73 to ensure the stability of the position of the rolling element 62 during assembly and use and prevent it from being separated from the annular groove 73. However, the bearing frame 61 provided in this embodiment limits all the rolling elements 62 at specific positions, and multiple rolling elements 62 are mutually restrained, so that the rolling elements 62 are not easy to be separated from the annular groove 73. Therefore, only a small part of the rolling element 62 needs to be located in the annular groove 73. The smaller the height dimension of the rolling element 62 located in the annular groove 73, the greater the height of the rolling element 62 protruding from the upper end surface of the support portion 7, and the greater the gap d between the upper end surface of the support portion 7 and the bearing frame 61 in the axial direction, and the smoother the flow of the medium.

[0053] Specifically, the rolling member 62 can contact the bottom of the annular groove 73, so that the rolling member 62 can be supported in the annular groove 73 more reliably. Of course, there can also be a gap between the rolling member 62 and the bottom of the annular groove 73. At this time, the rolling member 62 and the side wall support contact of the annular groove 73. In comparison, when the rolling member 62 contacts the bottom of the annular groove 73, the rolling of the rolling member 62 is smoother.

[0054] like Fig.14 As shown, in this embodiment, the valve core 5 includes an end face facing the bearing 6. The valve core 5 can also be provided with a groove 5a recessed in its end face, and a portion of each rolling element 62 is located in the groove 5a. The valve core 5 is also provided with a groove 5a, and after a portion of the rolling element 62 is located in the groove 5a, it can limit the valve core 5. The groove 5a can be a pit, and the valve core 5 is provided with a plurality of pits distributed along the circumferential direction, each pit corresponding to a rolling element 62. Of course, in order to improve the assembly efficiency, the groove 5a can be set as an annular groove, and a portion of all rolling elements 62 is set in the annular groove.

[0055] As an example, Fig.10 , 11 As shown, the support portion 7 is a cylindrical structure. In this case, the first flow channel 71 of the support portion 7 includes a through hole in the middle of the cylindrical structure. The support portion 7 of this structure has a large space in its through hole. The annular side wall of the support portion 7 only needs to maintain the necessary support stiffness and can be set as thin as possible to leave more space for use as the first flow channel 71, which is conducive to the flow of the medium. Of course, the thickness of the annular side wall of the support portion 7 also needs to consider the size requirements of the annular groove 73 set on its upper end surface. In this embodiment, the support portion 7 is specifically made of stainless steel and has good stiffness. On the premise of being set to be thin to form the first flow channel 71, it can also reliably support the bearing 6. Figure 3In the figure, a part of the support portion 7 is located in the mounting groove 4e, and the other part is located above the mounting groove 4e. The valve seat 9 in the valve cavity 4a is supported and matched with the valve core 5. The valve core 5 is a certain distance away from the bottom of the valve cavity 4a. The part of the support portion 7 that is higher than the mounting groove 4e is convenient for supporting the bearing 4 until it contacts the valve core 5.

[0056] Furthermore, if Fig.10 , 11 As shown, the support portion 7 has a second through hole 72 that radially penetrates its side wall. The through hole serves as a balancing hole and can connect the radial inner and outer sides of the support portion 7. One end of the second through hole 72 is connected to the first through hole, and the other end of the second through hole 72 is connected to the valve cavity 4d, specifically, connecting the first flow channel 71 and the gap between the support portion 7 and the side wall of the mounting groove 4e, and then connecting the first flow channel 71 and the valve cavity 4d to balance the pressure difference between the valve cavity 4d and the first flow channel 71.

[0057] like Figure 8 , 9 As shown, the bearing frame 61 in this embodiment is an annular frame with a through hole in the middle, and the third flow channel 63 of the bearing frame 61 includes the through hole in the middle of the bearing frame 61. The bearing frame 61 is set in an annular shape to facilitate the formation of the third flow channel 63. Fig.12 , 13 As shown, the elastic part 8 specifically includes a wave spring, which is a cylindrical elastic component with deformation capability. The second flow channel 81 of the wave spring includes a through hole in the middle thereof. The wave spring 8 has a continuous structure in the axial direction, which can provide elastic force to the support part 7 more stably and reliably, and establish reliable communication between the first channel 4a and the first flow channel 71. It can be seen that the elastic part 8 can also be a structure other than a wave spring, such as a spring or an elastic gasket. In this embodiment, the bearing frame 61, the support part 7 and the elastic part 8 are all set to a coaxially distributed annular or cylindrical structure, so that the third flow channel 63, the first flow channel 71 and the second flow channel 81 are coaxially arranged to form a connecting flow channel with approximately equal diameters, which can better conduct the first channel 4a and the first port 511 of the valve core 5.

[0058] You can continue to refer to Figure 3 , 5 In this embodiment, the valve stem 3 is inserted into the limiting groove 54 of the valve core 5, and interferes with the side walls of the limiting groove 54 to drive the valve core 5 to rotate, and has a spacing with the bottom of the valve core 5 to prevent the valve stem 3 and the valve core 5 from being stuck due to errors in processing and assembly. The valve seat 9 can play an axial limiting role on the valve core 5 to ensure the spacing between the valve stem 3 and the valve core 5. It can be understood that since the above-mentioned bearing 6 keeps contact with the valve core 5 in the axial direction to limit the deflection of the valve core 5, the precision requirement for the spacing between the valve stem 3 and the valve core 5 can also be reduced, and the processing difficulty can be reduced accordingly.

[0059] In addition, the valve body 4 in this embodiment includes a valve body 41 and a cover 42, a valve cavity 4d, a first channel 4a and a third channel 4c are provided in the valve body 41, one side of the valve body 41 is open, the cover 42 and the valve body 41 are plug-connected, the cover 42 is provided with a second channel 4b, after the cover 42 is installed to the valve body 41, one port of the second channel 4b faces the side wall of the valve core 5, or is connected to the second port 512 of the valve core 5. The cover 42 has a protrusion, which can be inserted into the opening of the valve body 41 and is sealed with the valve body 41 through a sealing ring. Figure 3 It can be seen from the figure that the valve seat 9 and the valve body 41 are sealed by a sealing ring and a wave spring.

[0060] Please refer to Fig.15 , 16 , Fig.15 for Figure 2 The CC section view shows that the valve device is in the first working condition. Fig.16 for Figure 2 The CC section view shows that the valve device is in the second working condition.

[0061] like Fig.15 As shown, the valve body assembly 1 also has a fourth channel 4f, and the third channel 4c has an opening in the wall forming the fourth channel 17. The valve device includes a sensor 110 (shown in Figure 5 ), a portion of the sensor 110 is located in the fourth channel 4f, and the sensor 110 can sense the parameters of the fluid in the fourth channel 4f. In this embodiment, the sensor 110 is a temperature and pressure sensor. In other embodiments, the sensor 110 can be a temperature sensor or a pressure sensor.

[0062] The valve device includes a control assembly 1, which includes a housing 12, a stator 11, and an electric control board 13, at least part of which is sleeved on the outer periphery of the rotor assembly 2. The stator 11 is electrically connected and / or signal-connected to the electric control board 13, the sensor 110 is electrically connected and / or signal-connected to the electric control board 13, the electric control board 13 is located in the housing 12, and the electric control board 13 can be electrically connected and / or signal-connected to the vehicle bus.

[0063] like Fig.15 As shown, after the valve device is connected to the thermal management system, the fourth channel 4f is connected to the outlet of the heat exchanger 120, and the second channel 4b is connected to the inlet of the heat exchanger 120. The heat exchanger 120 can be a plate heat exchanger or a microchannel heat exchanger.

[0064] The valve core 5 can adjust the refrigerant flow entering the heat exchanger 120, and the sensor 110 can measure the temperature and pressure of the refrigerant flowing out of the heat exchanger 120. After measuring the temperature and pressure, the sensor 110 can transmit the information to the vehicle processor or directly to the processor included in the electric control board 13. The processor can adjust the rotation angle of the valve core 5 according to the information of the sensor 110, thereby adjusting the refrigerant flow entering the heat exchanger 120.

[0065] Therefore, at least two working conditions can be realized through the valve device, which has high integration, small size, and multiple functions. It can be used in refrigerant systems and coolant systems, and is particularly suitable for automotive fields with high volume requirements.

[0066] like Fig.15 , 16 As shown, the valve core 5 has an expansion groove 55, which is recessed in the outer periphery of the valve core 5. The expansion groove 55 extends along the circumference of the main body of the valve core 5. One end of the expansion groove 55 is connected to the connecting channel 51. When the refrigerant passes through the expansion groove 55, a throttling expansion effect can be produced. By controlling the valve core 5, the valve device can realize a flow regulation function, and can also realize a throttling expansion function.

[0067] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A valve device, It is characterized in that The valve device comprises a valve body (4) and a valve core (5), wherein the valve device has a valve cavity (4d), the valve core (5) has a communication channel (51), the communication channel (51) has a first port (511) and a second port (512), and along the axial direction of the valve core (5), the first port (511) is located at one end of the valve core (5), and the second port (512) is located at the outer periphery of the valve core (5); The valve device further comprises a bearing (6) and a support portion (7); along the axial direction of the valve device, the valve core (5) is located on one side of the bearing (6), and the support portion (7) is located on the other side of the bearing (6); The support portion (7) has a first flow channel (71), the first flow channel (71) is connected to the first port (511), the bearing (6) includes at least two rolling elements (62), each of the rolling elements (62) is distributed at intervals along the circumference of the valve device, and along the axial direction of the valve device, one side of the rolling element (62) abuts against the valve core (5), and the other side of the rolling element (62) abuts against the support portion (7).

2. The valve device according to claim 1, It is characterized in that The valve device comprises an elastic portion (8), wherein the bearing (6), the support portion (7) and the elastic portion (8) are sequentially arranged along the axial direction of the valve device, and along the axial direction of the valve device, one side of the elastic portion (8) abuts against the support portion (7), and the other side of the elastic portion (8) abuts against the valve body (4); the elastic portion (8) has a second flow channel, and the second flow channel (81) is connected to the first channel (4a).

3. The valve device according to claim 2, It is characterized in that The bearing (6) comprises a bearing frame (61), the bearing frame (61) comprises a plurality of limiting holes, at least part of the rolling elements (62) are limited in the limiting holes, the bearing frame (61) is located between the valve core (5) and the support portion (7), and along the axial direction of the valve device, there is a gap between the bearing frame (61) and the support portion (7); the rolling elements (62) are balls or rollers.

4. The valve device according to any one of claims 1 to 3, It is characterized in that The support portion (7) comprises an end surface facing the valve core (5), and the support portion (7) has a groove sunken in the end surface thereof, and a portion of each rolling element (62) is located in the groove.

5. The valve device according to claim 4, It is characterized in that The groove is an annular groove (73), the groove extends along the circumference of the valve device, and a portion of each rolling element (62) is located in the annular groove (73); or, the groove is a pit, the support portion (7) has a plurality of pits spaced apart along the circumference of the valve device, and a portion of each rolling element (62) is located in a corresponding one of the pits.

6. The valve device according to claim 4, It is characterized in that Along the axial direction of the valve device, the size of the portion of the rolling element (62) located in the groove is smaller than half of the diameter of the rolling element (62).

7. The valve device according to any one of claims 4 to 6, It is characterized in that The rolling element (62) contacts the bottom of the annular groove (73), or there is a gap between the rolling element (62) and the bottom of the annular groove (73).

8. The valve device according to claim 5, It is characterized in that The valve core (5) comprises an end surface facing the bearing (6), the valve core (5) has a groove sunken in its end surface, and a portion of each rolling element (62) is located in the annular groove.

9. The valve device according to any one of claims 1 to 4, It is characterized in that The valve body (4) has a first channel (4a), the first channel (4a) has an opening in the wall forming the valve cavity (4d), at least part of the bearing (6) and the support portion (7) are located between the valve core (5) and the first channel (4a), and the first flow channel (71) is connected to the first channel (4a).

10. The valve device according to any one of claims 1 to 8, It is characterized in that The support portion (7) is a cylindrical structure, the support portion (7) has a first through hole extending along the axial direction of the valve device, and the first flow channel (71) of the support portion (7) includes the first through hole; the support portion (7) has a second through hole (72), the second through hole (72) extends along the radial direction of the valve device, one end of the second through hole (72) is connected to the first through hole, and the other end of the second through hole (72) is connected to the valve cavity.

11. The valve device according to claim 10, It is characterized in that The bearing (6) is annular as a whole, and a third flow channel (63) is provided in the middle of the bearing frame (61); one side of the third flow channel (63) is connected to the first flow channel (71) of the support portion (7), and the other side of the third flow channel (63) is connected to the first port (511); the third flow channel (63) is coaxially or approximately coaxially arranged with the first port (511) and the first flow channel (71).

12. The valve device according to any one of claims 2 to 8, It is characterized in that The elastic part (8) comprises a wave spring, a spiral spring or a butterfly spring, and the elastic part (8) has a through hole located in the middle of the elastic part (8); or the elastic part (8) comprises an elastic polymer.

13. The valve device according to any one of claims 1 to 11, It is characterized in that The valve body (4) has a third channel (4c) and a second channel (4b), and both the third channel (4c) and the second channel (4b) have openings in the wall forming the valve cavity (4d); by controlling the rotation of the valve core (5), the second port (512) and the second channel (4b) can be connected, or the second port (512) and the third channel (4c) can be connected.

14. The valve device according to claim 11, It is characterized in that The valve body (4) has a fourth channel (4f), and the third channel (4c) has an opening in a wall forming the fourth channel (4f); the valve device comprises a sensor (10), and a portion of the sensor (10) is located in the fourth channel (4f); the valve device comprises a control component (1) and a rotor component (2), the control component (1) comprises a housing (12), a stator (11) and an electric control board (13), the rotor component (2) comprises a rotor (21), and at least a portion of the stator (11) is sleeved on the outer periphery of the rotor component (2); the stator (11) is electrically connected and / or signal-connected to the electric control board (13), the sensor (10) is electrically connected and / or signal-connected to the electric control board (13), the electric control board (13) is located in the housing (12), and the electric control board (13) can be electrically connected and / or signal-connected to a vehicle bus.

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