Valve device

Abstract

The invention provides a valve device which comprises a valve body assembly, the valve body assembly comprises a valve body, a partition component and a valve element seat, the valve element seat is fixedly connected with the partition component, a valve seat element is provided with a valve port, the valve device comprises a first cavity and a second cavity which are located on different sides of the partition component, and the first cavity and the second cavity can communicate through the valve port; the valve body assembly further comprises a first filter unit, the first filter unit is located in the first cavity and comprises a first filter screen, the first filter screen comprises a first cylindrical filter screen and a bottom filter screen located at the bottom end of the first cylindrical filter screen, and the first cylindrical filter screen is arranged around the valve seat element. The bottom filter screen directly or indirectly abuts against the separation component in the axial direction; the valve device further comprises an elastic component which is directly or indirectly pre-compressed between the bottom filter screen and the valve seat core. The valve device can relatively improve the installation reliability of the first filter unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a valve device. BACKGROUND

[0002] As shown in Figure 23 , 24 , Figure 23 is a structural schematic diagram of an electronic expansion valve; Figure 24 is Figure 13 a structural schematic diagram of a valve body assembly, which is an axial cross-sectional view.

[0003] The electronic expansion valve comprises a valve body assembly 001 and a coil component 002. As shown in Figure 24 , the valve body assembly 001 comprises a rotor component 01, a nut 02, a valve rod component 03 and a valve seat 04, the valve seat 04 is provided with a valve port 04a, the coil component 002 is energized to drive the rotor component 01 to rotate, the rotor component 01 drives the valve rod component 03 to rotate, the valve rod component 03 and the nut 02 are threadedly connected, and then move axially to open and close the valve port 04a.

[0004] If there are impurities in the medium entering the electronic expansion valve, the impurities will enter the electronic expansion valve, thereby affecting the working performance of the electronic expansion valve. As shown in Figure 23 , in order to reduce the influence of impurities on the electronic expansion valve, the air conditioner main machine manufacturer will be equipped with a first filter 003 and a second filter 004 when using the electronic expansion valve, the first filter 003 is connected to one interface of the valve body assembly 001 through a first pipeline 005, and the second filter 004 is connected to another interface of the valve body assembly 001 through a second pipeline 006.

[0005] However, in this way, when the electronic expansion valve is installed in the air conditioning system, the pipelines need to be welded separately before and after the electronic expansion valve to connect the filters, which is complicated to install and increases the cost. SUMMARY

[0006] The purpose of the present application is to provide a valve device which can relatively improve the installation reliability of the first filter unit.

[0007] The valve device provided by the present application comprises a valve body assembly, the valve body assembly comprises a valve body, a separation component and a valve core seat, the valve core seat is fixedly connected with the separation component, the valve core seat is provided with a valve port, the valve device comprises a first chamber and a second chamber located on different sides of the separation component, and the first chamber and the second chamber can be communicated through the valve port.

[0008] The valve body assembly also includes a first filter unit, which is located in the first chamber. The first filter unit includes a first filter screen and a first clamp. The first filter screen includes a first cylindrical filter screen and a bottom filter screen located at the bottom end of the first cylindrical filter screen. The first clamp is limitedly connected to a portion of the first cylindrical filter screen. The first clamp is tightly fitted with the valve body. The first cylindrical filter screen is arranged around the valve seat core, and the bottom filter screen directly or indirectly abuts against the partition component in the axial direction; the valve device also includes an elastic component, which is directly or indirectly pre-compressed between the bottom filter screen and the valve seat core.

[0009] In the present application, the valve device includes a valve core seat and a partition component, the valve core seat is fixedly connected to the partition component, and the valve device is also provided with a first filter unit, the first filter unit includes a first filter screen, the bottom filter screen of the first filter screen directly or indirectly abuts against the partition component along the axial direction; the valve device also includes an elastic component, the elastic component is directly or indirectly pre-compressed between the bottom filter screen and the valve seat core, that is, the lower part of the first filter screen abuts against the partition component with the help of the elastic force of the elastic component, which can achieve the installation reliability of the first filter unit in the valve device.

[0010] In addition, the bottom of the first filter screen of the first filter unit is pressed between the valve seat core and the partition component by an elastic component, and the valve seat core does not directly abut the first filter screen. Compared with the valve seat core directly pressing the first filter screen, the solution of the present application can improve the force applied to the first filter screen, which can be installed stably and reliably while ensuring the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the valve device in the embodiment of the present application, from an axial cross-sectional perspective;

[0012] Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve body assembly;

[0013] Figure 3 for Figure 2 Assembly diagram of the middle valve base, valve seat core, first filter unit, and first connecting pipe;

[0014] Figure 4 for Figure 2 Schematic diagram of the assembly of the second valve body, the second connecting pipe and the second filter unit;

[0015] Figure 5 for Figure 3 A schematic structural diagram of the first filter unit;

[0016] Figure 6 for Figure 5 A cross-sectional view of the first filter unit along the axial direction;

[0017] Figure 7 Fig. 1 is a perspective view of a valve body of the present application; Figure 3 Fig. 2 is a sectional view of the valve body along the axial direction;

[0018] Figure 8 Fig. 3 is a sectional view of the valve body along the axial direction; Figure 3 Fig. 4 is a sectional view of the valve seat core;

[0019] Figure 9 Fig. 5 is a sectional view of the elastic member; Figure 8 Fig. 6 is a sectional view of the elastic member in a compressed state;

[0020] Figure 10 Fig. 7 is a sectional view of the elastic member in a compressed state; Figure 3 Fig. 8 is a sectional view of the elastic member along the axial direction;

[0021] Figure 11 Fig. 9 is a sectional view of the elastic member along the axial direction; Figure 10 Fig. 10 is a sectional view of the elastic member in a compressed state along the axial direction;

[0022] Figure 12 Fig. 11 is a sectional view of the elastic member in a compressed state along the axial direction; Figure 3 Fig. 12 is an enlarged view of the position where the elastic member and the valve seat core and the first filter unit are fitted together;

[0023] Figure 13 Fig. 13 is an enlarged view of the position where the elastic member and the valve seat core and the first filter unit are fitted together; Figure 2 Fig. 14 is an enlarged view of the position where the first clamp and the first valve body part are connected together;

[0024] Figure 3 Fig. 15 is a sectional view of the second valve body part; Figure 15 Fig. 16 is an enlarged view of the position where the second filter unit and the second valve body part are connected together;

[0025] Figure 2 Fig. 17 is a sectional view of the second filter unit; Figure 16 Fig. 18 is a sectional view of the second filter unit;

[0026] Figure 2 Fig. 19 is a sectional view of the second filter unit; Figure 17 Fig. 20 is an enlarged view of the position where the second filter unit and the second valve body part are connected together;

[0027] Figure 2 Fig. 21 is a sectional view of the second filter unit; Figure 18 Fig. 22 is an enlarged view of the position where the second filter unit and the second valve body part are connected together;

[0028] Figure 19 Fig. 23 is a sectional view of the elastic member and the first filter unit and the valve seat core fitted together in another embodiment of the present application;

[0029] Figure 18 Fig. 24 is a sectional view of the elastic member along the axial direction; Figure 20 Fig. 25 is a sectional view of the elastic member along the axial direction;

[0030] Figure 19 Fig. 26 is a sectional view of the elastic member along the axial direction; Figure 21 Fig. 27 is a sectional view of the elastic member along the axial direction;

[0031] Figure 22Fig. 2 is a schematic view of a structure of an elastic member and a first filter unit in another embodiment of the present application;

[0032] Figure 21 Fig. 1 is a schematic view of a structure of an elastic member and a first filter unit in another embodiment of the present application; Figure 23 Fig. 2 is a schematic view of a structure of an elastic member and a first filter unit in another embodiment of the present application;

[0033] Figure 24 Fig. 3 is a schematic view of a structure of an electronic expansion valve in another embodiment of the present application;

[0034] Figure 23 Fig. 1 is a schematic view of a structure of an elastic member and a first filter unit in another embodiment of the present application; Figures 1-3 Fig. 2 is a schematic view of a structure of an elastic member and a first filter unit in another embodiment of the present application;

[0035] Reference signs in the above-described drawings are explained as follows:

[0036] 100 - valve body assembly

[0037] 100A - first chamber; 100B - second chamber

[0038] 10 - second valve body part; 20 - rotor member; 30 - transmission member; 40 - valve stem member

[0039] 51 - first filter unit; 512 - first clamp; 511 - first filter screen; 5111 - first cylindrical filter screen; 5112 - first bottom filter screen; 5112a - filter screen through hole; 52 - second filter unit; 522 - second clamp; 521 - second filter screen; 5211 - second cylindrical filter screen; 5212 - top filter screen; 53 - elastic member; 531 - first end part; 532 - second end part

[0040] 60 - housing; 70 - coil fixing bracket; 80 - valve base; 80a - first interface; 80b - mounting hole; 801 - fourth step part; 802 - third step part; 803 - partition member; 804 - first valve body part; 90 - valve seat core; 90a - valve port; 901 - second step part; 902 - first step part; 903 - fitting part

[0041] 200 - coil member

[0042] 301 - first connecting pipe; 302 - second connecting pipe

[0043] 001 - valve body assembly; 002 - coil member; 003 - first filter; 004 - second filter; 005 - first pipe; 006 - second pipe; 01 - rotor member; 02 - nut; 03 - valve stem member; 04 - valve seat; 04a - valve port DETAILED DESCRIPTION

[0044] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0045] Please refer to Figure 1 , Figure 2 is a structural schematic view of the valve device in the embodiment of the present application, which is an axial cross-sectional view; Figure 1 is Figure 3 a structural schematic view of the valve body assembly 100 in the embodiment of the present application; Figure 2 is Figure 2 an assembly schematic view of the valve base 80, the valve seat core 90, the first filter unit 51 and the first connecting pipe 301 in the embodiment of the present application.

[0046] The valve device in the embodiment includes a valve body assembly 100 and a coil component 200, the coil component 200 is sleeved on the outside of the valve body assembly 100, the valve body assembly 100 is further provided with a coil fixing frame 70, which can position the coil component 200, the valve device is further provided with a first connecting pipe 301 and a second connecting pipe 302, which have a first interface 80a and a second interface 10a, the first connecting pipe 301 is installed at the first interface 80a of the valve body assembly 100, and the second connecting pipe 302 is installed at the second interface 10a of the valve body assembly 100, the first connecting pipe 301 is used for introducing medium into the valve body assembly 100, and the second connecting pipe 302 is used for discharging medium from the valve body assembly 100, the valve device can be a bidirectional valve, that is, medium can also enter the valve body assembly 100 through the second connecting pipe 302 and then be discharged through the first connecting pipe 301, the first interface 80a and the second interface 10a are used for the inflow or outflow of medium, and the valve device can be applied to an air conditioning system, and the medium is correspondingly refrigerant.

[0047] The valve body assembly 100 in the embodiment is as shown in Figure 3 , which includes a rotor component 20, a transmission component 30, a valve rod component 40, a valve seat core 90 and a valve body, the valve body specifically includes a first valve body part 804, a second valve body part 10 and an outer shell 60 in the embodiment, and the valve body constitutes the entire shell structure of the valve device. Exemplarily, the valve body assembly 100 includes a valve base 80, as shown in Figure 2 , the valve base 80 is a one-piece structure, which includes a cylindrical side wall part and a bottom wall part in the shape of a ring, which is connected to the bottom of the side wall part, the side wall part is the first valve body part 804, and the bottom wall part is a partition component 803, and the valve seat core 90 is installed on the partition component 803. The main body of the second valve body part 10 is a sleeve structure, and the second valve body part 10 is connected to the bottom of the valve base 80, so that the partition component 803 separates the inner cavity of the valve body into a first chamber 100A and a second chamber 100B, and the first chamber 100A and the second chamber 100B are located on different sides of the partition component 803, and the rotor component 20 is located in the first chamber 100A, and the transmission component 30 is located in the second chamber 100B. Figure 4In other words, the inner cavity of the valve base 80 is the first chamber 100A, and the inner cavity of the second valve body 10 is the second chamber 100B. The outer shell 60 of the valve body assembly 100 comprises a tubular structure, and a top cover is integrally arranged at the top of the tubular structure. The lower end of the outer shell 60 is open, at least part of the rotor component 20 is arranged in the outer shell 60, the lower end of the outer shell 60 is connected with the valve base 80, and the upper end of the first valve body 804 of the valve base 80 can be provided with a stepped portion. The lower end of the outer shell 60 abuts on the stepped portion and is welded and fixed. The welding is, for example, laser welding, and the other welding positions described below can also be laser welding. Of course, other welding methods can also be used. The first valve body 804, the second valve body 10, and the outer shell 60 constitute the entire shell structure of the valve body assembly 100. It can be seen that the shell structure of the valve body assembly 100 is not limited to this arrangement. As long as the inner cavity is formed for arranging the internal components such as the rotor component 20 and the valve rod component 40, the first valve body 804 and the second valve body 10 can also be an integral structure, the partition component 803 can be arranged separately from the first valve body 804, the partition component 803 can be arranged integrally with the second valve body 10, and so on. Here, the partition component 803 is integrally formed with the first valve body 804, which can be formed by forging, machining, or the like. The second valve body 10 can be directly stretched and formed by a pipe body, which is simple to process and convenient to assemble.

[0048] In detail, the first interface 80a of the valve body assembly 100 is arranged on the valve base 80, and the first interface 80a is specifically arranged on the side of the valve base 80, that is, arranged on the first valve body 804. As shown in Figure 4 , Figure 2 As shown in Figure 2 , the second valve body 10 and the second connecting pipe 302, and the second filter unit 52 are assembled.

[0049] The second interface 10a is arranged at one end of the valve body assembly 100 in the axial direction, that is, the end away from the rotor component 20, and is specifically arranged at Figure 2 the bottom of the second valve body 10. As shown in Figures 5-13 , 3 The valve seat core 90 is arranged with a valve port 90b of the valve device, and the valve port 90b can be connected with the first interface 80a and the second interface 10a, or disconnected from the first interface 80a and the second interface 10a.

[0050] The valve device in this embodiment is specifically an electronic expansion valve, the coil component 200 is energized to control the rotation of the rotor component 20, the rotor component 20 drives the rotation of the valve stem component 40, the transmission component 30 is provided with internal threads, which cooperate with the external threads of the valve stem component 40, so that when the valve stem component 40 rotates, the valve stem component 40 can also move axially under the threaded transmission cooperation, so that the valve stem component 40 can move away to open the valve port 90b, the first interface 80a and the second interface 10a are connected, or the valve stem component 40 approaches to close the valve port 90b, the first interface 80a and the second interface 10a are disconnected.

[0051] It should be emphasized that the valve body assembly 100 of the valve device in this embodiment includes a filtering mechanism, which includes a first filtering unit 51 and a second filtering unit 52. The valve body of the valve body assembly 100 has an inner cavity, including a first cavity 100A and a second cavity 100B located on the two sides of the separation component 803 respectively, the two cavities are separated by the separation component 803, and the first cavity 100A and the second cavity 100B can be part of the inner cavity of the valve body. The first filtering unit 51 and the second filtering unit 52 are distributed in the axial direction, the bottom of the first filtering unit 51 is mounted to the separation component 803, and the second filtering unit 52 is mounted to the second valve body 10. Among them, the first cavity 100A and the first interface 80a remain connected, the second cavity 100B and the second interface 10a remain connected, although the first cavity 100A and the second cavity 100B are separated by the separation component 803, but the first cavity 100A and the second cavity 100B can be connected through the valve port 90b, that is, only when the valve port 90b is open, the first cavity 100A and the second cavity 100B are connected, when the valve port 90b is closed, the first cavity 100A and the second cavity 100B are not connected.

[0052] In addition, the first filtering unit 51 is arranged on one side of the valve port 90b in the axial direction, and the second filtering unit 52 is arranged on the other side of the valve port 90b in the axial direction, in other words, the first filtering unit 51 is arranged on the path from the first interface 80a to the valve port 90b, and the second filtering unit 51 is arranged on the path from the second interface 10a to the valve port 90b, so that the medium entering from any interface needs to pass through the corresponding filtering unit before entering the valve port 90b, that is, the medium entering from the first interface 80a needs to pass through the first filtering unit 51 before reaching the valve port 90b, and the medium entering from the second interface 10a needs to pass through the second filtering unit 52 before reaching the valve port 90b.

[0053] See again Figure 5 , Figure 3 For Figure 6 the structure diagram of the first filtering unit 51 in the first embodiment; Figure 5 For Figure 7 the axial sectional view of the first filtering unit 51 in the first embodiment; Figure 3for Figure 8 A schematic structural diagram of the middle valve base 80; Figure 3 for Figure 9 A schematic structural diagram of the middle valve seat core 90; Figure 8 for Figure 10 A schematic structural diagram of the elastic component 53, wherein the elastic component 53 is in a natural state; Figure 3 for Figure 11 A front view of the middle elastic member 53; Figure 10 for Figure 12 A schematic diagram of the structure in which the elastic component is in a compressed state; Figure 3 for Figure 13 An enlarged view of the mating position of the middle elastic member 53, the valve seat core 90, and the first filter unit 51; Figure 2 for Figure 3 An enlarged view of the mating positions of the middle elastic component 53 , the valve seat core 90 , and the first filter unit 51 .

[0054] The filter mechanism in this embodiment further includes an elastic component 53. Figure 5 In the embodiment, the spiral retaining ring is specifically a spiral retaining ring having an opening, with a first end 531 and a second end 532 at both ends. In a free state, the axial height of the first end 531 is higher than the height of the second end 532. After being compressed by force, the height difference between the first end 531 and the second end 532 is reduced, thereby having better deformation ability.

[0055] like Figure 3 、 6 As shown, the first filter unit 51 includes a first filter screen 511, which includes a first cylindrical filter screen 5111 and an annular bottom filter screen 5112 located at the bottom end of the first cylindrical filter screen 5111. The bottom filter screen 5112 has a filter screen through hole 5112a. The first cylindrical filter screen 5111 is arranged around the valve seat core 90, and the bottom filter screen 5112 directly abuts against the partition component 803 in the axial direction. Figure 3 That is, it rests against the upper end surface of the partition component 803, and the elastic component 53 is directly pre-compressed between the bottom filter screen 5112 and the valve seat core 90. It can be seen that the elastic component 53 can also be indirectly pre-compressed between the bottom filter screen 5112 and the valve seat core 90, or the bottom filter screen 5112 can indirectly rest against the partition component 803 along the axial direction.

[0056] Therefore, first, the first filter unit 51 and the second filter unit 52 in the embodiment enclose a filter cavity, the valve port 90b is located in the filter cavity, and the filter unit is arranged on both sides of the valve port 90b. Impurities are not easy to enter the position of the valve port 90b. The main influence of impurities on the performance of the valve device is that they stay in the valve port part, thereby affecting the reliability of the cooperation between the valve rod part 40 and the valve port 90b. As long as the impurities are reduced or prevented from entering the position of the valve port 90b, the reliability of the cooperation between the valve rod part 40 and the valve port 90b can be ensured. The filter unit in the embodiment is directly arranged in the interior of the valve device, and no external filter needs to be connected to the valve device as described in the background art. The system structure can be simplified, and the installation difficulty and cost can be reduced.

[0057] Secondly, in the background art, since the external filter needs to be welded separately, the leakage probability of the welding part is also increased. The built-in filter mechanism in the embodiment can reduce the leakage probability. Moreover, if the valve device is applied to an air conditioning system, the installation space required by the pipeline assembly of the air conditioning system is larger if the external filter in the background art is used. Therefore, the main machine needs to be designed to have a larger accommodation space, which may lead to an increase in the overall size of the machine and an increase in the complexity of the pipeline design of the main machine. The scheme of the embodiment of the application can obviously reduce the installation space and facilitate the design of the main machine. In addition, in the background art, the external filter is a certain distance away from the valve cavity and the valve port of the valve device and needs to be connected through an external pipeline. The passageway of the filter is large, and the passageway of the external pipeline connected thereto is small. The medium flows through the filter from the external pipeline and then flows to the valve cavity through the external pipeline, and needs to pass through multiple flow passage diameter changes. This may increase the flow noise of the medium. The built-in filter mechanism in the embodiment of the application can reduce the noise caused by the change in the passageway of the external pipeline and the filter.

[0058] Furthermore, the bottom of the first filter screen 511 of the first filter unit 51 is pressed between the valve seat core 90 and the partition component 803 by the elastic component 53, so that the installation reliability of the first filter unit 51 in the valve device can be achieved. Moreover, the valve seat core 90 does not directly abut against the first filter screen 511. On the one hand, if the valve seat core 90 directly abuts against the first filter screen 511, the stress of the first filter screen 511 can be improved. In detail, in order to ensure that the valve seat core 90 and the partition component 803 are assembled in place, for example, are press-fitted to the partition component 803, the assembly force is likely to cause damage to the first filter screen 511, especially at the corner positions of the bottom filter screen 5112 of the first filter screen 511, such as the inner edge of the bottom filter screen 5112, the position where the bottom filter screen 5112 and the first cylindrical filter screen 5111 meet, and the like. After the damage, the filtering effect is lost or reduced. By being pressed by the elastic component 53, the stress of the first filter screen 511 can be improved, so that the stable and reliable installation can be achieved, and the filtering effect can be ensured. On the other hand, the first filter screen 511 is a wire mesh, and the dimensional accuracy is limited in actual production. For example, there may be uneven thickness, wire edges at the opening positions, and the like. If the valve seat core 90 directly abuts against the bottom filter screen 5112, the first filter screen 511 may also cause the press-fitting of the valve seat core 90 to be skewed, causing the coaxiality deviation, and thus causing the defects that the valve rod component 40 and the valve port 90a are not tightly sealed or even are stuck. By setting the elastic component 53 as an intermediate transition piece, the problem can be avoided.

[0059] Please continue to refer to Figure 8 The partition component 803 includes a mounting hole 80b, and the valve seat core 90 is mounted to the partition component 803, specifically is press-fitted to the mounting hole 80b, as shown in Figure 8 The valve seat core 90 includes a fitting portion 903, and the outer diameter of the fitting portion 903 is set to be press-fitted to the hole wall corresponding to the mounting hole 80b, and can be slightly larger than the hole diameter of the mounting hole 80b. The valve seat core 90 is press-fitted to the mounting hole 80b, so that the installation is achieved, and also has a sealing effect, so that the first chamber 100A and the second chamber 100B are prevented from being communicated through the gap between the valve seat core 90 and the mounting hole 80b. The sealing component can also be arranged between the valve seat core 90 and the hole wall of the mounting hole 80b, for example, a sealing ring is arranged, so that the valve seat core 90 and the partition component 803 are sealed in the entire circumferential direction after being mounted, and only the valve port 90b and the first chamber 100A and the second chamber 100B on both sides are allowed to be communicated.

[0060] As shown in Figure 3 The outer side wall of the valve seat core 90 is provided with an annular first step portion 902, the first step portion 902 faces the partition component 803 of the valve base body 80, and the first step portion 902 can abut against the upper end face of the partition component 803. A sealing component, for example, a sealing ring, can also be arranged between the first step portion 902 and the upper end face of the partition component 803.

[0061] Look again Figure 3 、 8 , 12, the outer side wall of the valve seat core 90 is further provided with an annular second step portion 901, and the second step portion 901 also faces the partition component 803. Figure 3 It is understood that the elastic component 53 is pressed between the bottom filter 5112 and the second step 92 of the valve seat core 90. This configuration provides a two-stage step on the outer wall of the valve seat core 90, which allows for better alignment with the partition 803 and the elastic component 53, ensuring better coaxiality. It is understood that the valve seat core 90 is not limited to this structure. For example, the second step 901 alone is provided, and the second step 901 is not limited to an annular shape. This configuration is sufficient to press the elastic component 53. However, an annular step provides more reliable compression and more uniform force distribution.

[0062] Please continue to refer to Figure 6 , and combined with Figure 2 It is understood that the first filter unit 51 in this embodiment includes a first filter screen 511 and an annular first clamp 512. The first filter screen 511 includes a first cylindrical filter screen 5111 and a bottom filter screen 5112 located at the bottom end of the first cylindrical filter screen 5111. Figure 14 For perspective, the top and bottom are defined as the upper end and the bottom end, respectively. The direction in which the valve stem component 40 moves to open the valve port 90b is upward, and the reverse direction is downward. The first clamp 512 is annular and has an annular groove. The top end of the first cylindrical filter screen 5111 is engaged within the annular groove of the first clamp 512, maintaining a fixed connection with the first clamp 512. Since the valve seat core 90, which provides the valve port 90b, is located between the first filter unit 51 and the second filter unit 52 and needs to be inserted into the partition component 803, the bottom filter screen 5112 of the first filter screen 511 needs to be provided with a filter screen through-hole 5112a to allow the valve seat core 90 to pass through the filter screen through-hole 5112a and be installed into the partition component 803. However, it can be understood that if the valve seat core 90 is not inserted into the partition component 803, the bottom filter screen 5112 can actually be provided without the filter screen through-hole 5112a.

[0063] At this time, the first clamp 512 of the first filter unit 51 is installed in the first valve body 804, and the first clamp 512 and the inner wall of the first valve body 804 are sealed in the entire circumference, specifically, they are interference fit with the inner wall of the first valve body 804. Figure 14 As shown, Figure 3 for Figure 7 An enlarged view of the connection position between the first clamp 512 and the first valve body portion 804.

[0064] The first clamp 512 can be provided to reinforce the first cylindrical filter screen 5111, so that the first filter screen 511 and the first valve body part 804 are more reliably mounted. The first clamp 512 is made of metal or other hard material, and the first clamp 512 and the first cylindrical filter screen 5111 are not limited to the above-mentioned clamping groove connection, but can be connected in a limiting manner. The interference fit installation method is relatively simple and reliable. In addition, the interference fit allows the filter cavity of the first filter unit 51 and the first interface 80a to be separated, so that after the medium enters the first interface 80a, it can only enter the position of the valve port 90a after being filtered by the first filter screen 511, that is, the first filter screen 511 is arranged on the path from the first interface 80a to the valve port 90a. That is, the position where the top end of the first filter unit 51 and the first valve body part 804 are connected is closer to the upper side than the first interface 80a, or closer to the side of the rotor part 20, and the inner wall of the first valve body part 804 is sealed in the entire circumferential direction. It can be understood that the connection method of the first filter unit 51 and the first valve body part 804 is not limited to interference fit, but can also be connected by fasteners such as screws, buckles, etc., and sealing members such as sealing rings can be provided at this time. In addition, the first filter unit 51 does not necessarily need to be provided with a clamp, and the filter screen itself can be fixedly connected to the first valve body part 804.

[0065] As shown in Figure 3 , the inner wall of the first valve body part 804 of the valve base 80 includes a third step part 802, which is arranged upward, in combination with Figure 7 It is understood that the first clamp 512 of the first filter unit 51 and the first valve body part 804 are interference fit on the inner wall part above the third step part 802, which is beneficial to determine the installation position of the first filter unit 51, so that the bottom filter screen 5112 abuts to the upper surface of the partition part 803. In addition, the axial section of the first cylindrical filter screen 5111 is in the shape of an inverted trapezoid with the upper part being larger and the lower part being smaller, so that the filter screen has better structural strength and is not easy to deform.

[0066] Figure 15 The fourth step part 801 is further arranged at the bottom of the valve base 80 around, which can abut and cooperate with the top of the second valve body part 10, and can be fixed by welding to simply and reliably realize the connection and fixation of the first valve body part 10 and the second valve body part 804.

[0067] Please see Figure 15 , 16 , Figure 2 for Figure 16 the structure schematic view of the second valve body part 10; Figure 2 for Figure 2 the structure schematic view of the second filter unit 52.

[0068] The structure of the second filtering unit 52 is similar to that of the first filtering unit 51. The second filtering unit 52 comprises a second filtering screen 521 and a ring-shaped second clamp 522. The second filtering screen 521 comprises a second cylindrical filter screen 5211 and a top filter screen 5212 located at the top end of the second cylindrical filter screen 5211. The second clamp 522 has a ring-shaped slot. The bottom end of the second cylindrical filter screen 5211 is clamped in the ring-shaped slot of the second clamp 522. The second clamp 522 is installed in the second valve body part 10. The second clamp 522 is arranged to reinforce the second cylindrical filter screen 5211 and make the installation of the second filtering screen 521 and the second valve body part 10 more reliable. The second clamp 522 is made of metal or other hard materials. The second clamp 522 and the second cylindrical filter screen 5211 are not limited to the clamping and slot connection described above, but can be connected in a limiting manner. The top filter screen 5212 of the second filtering screen 521 does not need to be provided with a filter screen through hole. The medium flowing from the second interface 10a can be filtered by the top filter screen 5212 and the second cylindrical filter screen 5211, then enter the inner cavity of the second filtering screen 521, and then flow to the valve port 90b.

[0069] It can be understood that the first filtering unit 51 has a cooperation relationship with the valve seat core 90, and the first interface 80a is arranged on the first valve body part 80, i.e., located on the side of the valve body assembly 100. Therefore, the first filtering unit 51 is provided with the first cylindrical filter screen 5111, which can surround the outside of the valve seat core 90 to filter the medium on the path from the first interface 80a to the valve port 90a. For the second filtering unit 52, the path between the corresponding valve port 90a and the second interface 10a is an axial path, and only the medium entering from the second interface 10a and flowing to the valve port 90b needs to be filtered. At this time, the structure of the second filtering unit 52 is more flexible, such as being directly provided as a circular filter screen. Of course, the second filtering unit 52 is also provided with the second cylindrical filter screen 5211. Compared with the first filtering unit 51, the filtering area can be increased, the filtering effect can be improved, the resistance to the medium can be reduced, and the second clamp 522 can be more reliable and convenient when installed in the second valve body part 10. It can be known that the second filtering unit 52 can also be installed in the partition part 803. Compared with the first filtering unit 51, the second filtering unit 52 is more easily installed in the second valve body part 10.

[0070] In combination Figure 2 , 4It is understood that the second clamping hoop 522 of the second filter unit 52 in the embodiment is in sealing fit with the inner wall of the second valve body part 10 in the whole circumference, and is also in interference fit, and the second clamping hoop 522 is arranged to facilitate the interference fit with the inner wall of the second valve body part 10. The interference fit installation method is relatively simple and reliable. It can be understood that the connection method of the second filter unit 52 and the second valve body part 10 is not limited to interference fit, for example, it can also be connected by fasteners such as screws, buckles, etc. Sealing members such as sealing rings can be provided to seal with the second valve body part 10 in the whole circumference, and the second filter unit 52 does not necessarily have a clamping hoop, and the filter screen itself can be fixedly connected with the second valve body part 10. As shown in Figure 17 、 16 , the radial dimension of the second cylindrical filter screen 5211 gradually increases in the direction away from the valve seat core 90, and the axial section of the second filter unit 52 is trapezoidal. In this way, the second filter screen 521 has good strength, and the second filter screen 521 is not easy to deform when the second clamping hoop 522 is interference fit with the second valve body part 10. Similarly, the first filter screen 511 described above is trapezoidal and is not easy to deform when it is interference fit with the first valve body part 804. It can be known that the structure of the first cylindrical filter screen 5111 and the second cylindrical filter screen 5211 is not limited to this, for example, it can be a cylindrical shape, etc.

[0071] As shown in Figure 17 , Figure 2 , it is an enlarged view of the connection position of the second filter unit 52 and the second valve body part 10. Figure 4

[0072] The second valve body part 10 in the embodiment includes a sleeve 103 and a first flange 101 extending radially along the bottom of the sleeve 103, the second clamping hoop 522 is interference fit with the inner wall of the sleeve 103 and abuts to the first flange 101, in this way, the installation of the second filter unit 52 is more stable and reliable. As shown in Figure 17 、 15 , the inner side of the first flange 101 also extends axially upward to form an annular second flange 102, the hole part of the second flange 102 is a second interface 10a, and the second flange 102 can be used to install a second connecting pipe 302, which is convenient to install, for example, the second connecting pipe 302 can be interference press-fit connected with the second flange 102.

[0073] As shown in Figures 18-20 ​The sleeve 103 of the second valve body 10 in this embodiment also comprises a pressing portion 1031 which is recessed radially inward from the outer sidewall of the sleeve 103, thus forming a protrusion on the inner side of the sleeve 103 which presses against the second clamp 522, thereby increasing the reliability of the connection between the second filter unit 52 and the second valve body 10 and improving the sealing. In detail, the top edge of the outer sidewall of the annular groove of the second clamp 522 is inclined inward to rivet the second filter screen 521, and the pressing portion 1031 can press against the top end of the second clamp 522, i.e. the riveting position of the second clamp 522, thereby further promoting the reliability of riveting. The pressing portion 1031 can be formed after the second clamp 522 is interference-fitted to the second valve body 10, and the pressing portion 1031 is formed by, for example, a rolling process.

[0074] This embodiment also provides an assembly method of the valve device, comprising the following steps:

[0075] Assembling the first filter unit 51 and the second filter unit 52 into the valve body to form the valve device. The assembly of the first filter unit 51 comprises:

[0076] S1, assembling the first filter unit 51 into the valve body and axially contacting the partition member 803;

[0077] Specifically, the first filter unit 51 is assembled into the valve base 80, and the first clamp 512 of the first filter unit 51 is interference-fitted with the inner wall of the first valve body 804 of the valve base 80.

[0078] S2, assembling the elastic member 53 such that the elastic member 53 contacts the bottom filter screen 5112 of the first filter unit 51, and assembling the valve seat core 90 such that the valve seat core 90 presses the elastic member 53, specifically, the valve seat core 90 is interference-fitted to the mounting hole 80b of the partition member 803 while the elastic member 53 is compressed.

[0079] Please refer to Figure 18 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application; Figure 19 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application; Figure 18 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application; Figure 20 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application. Figure 19 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application. Figure 21 , which is a structural schematic view of the cooperation between the elastic member 53 and the first filter unit 51 and the valve seat core 90 in another embodiment of the present application.

[0080] The elastic member 53 in this embodiment is specifically an annular disc spring, and the radial dimension of the disc spring gradually decreases in the axial direction away from the partition member 803. The disc spring thus arranged has good elasticity, and is compressed between the second step portion 901 of the valve seat core 90 and the upper end surface of the partition member 803. The remaining structures of this embodiment are completely the same as those of the above-described embodiments, and will not be described again.

[0081] Please refer to Figure 21 、 22 as shown, Figure 22 is a structural schematic view of the elastic component 53 and the cooperation between the first filter unit 51 and the valve seat core 90 in another embodiment of the present application; Figure 21 is ​ a structural schematic view of the elastic component 53 in the embodiment.

[0082] The elastic component 53 in this embodiment is specifically a spring, which has a certain height in the axial direction. Correspondingly, the height between the first step portion 902 and the second step portion 901 of the valve seat core 90 will increase. In the three embodiments, the height of the elastic component 53 in the free state is greater than the height between the first step portion 902 and the second step portion 901. In this way, it can be ensured that the elastic component 53 can be compressed and deformed after the valve seat core 90 is assembled, so as to press the bottom filter screen 5112 of the first filter unit 51. Similarly, the remaining structure of the valve device in this embodiment is completely the same as that of the above embodiments, and will not be described again.

[0083] The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment descriptions are only used to help understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A valve device, characterized by The valve body assembly comprises a valve body, a partition component and a valve seat core, the valve seat core is fixedly connected with the partition component, the valve seat core is provided with a valve port, the valve device comprises a first chamber and a second chamber located on different sides of the partition component, the first chamber and the second chamber can communicate through the valve port; The valve body assembly further comprises a first filter unit, the first filter unit is located in the first chamber, the first filter unit comprises a first filter screen, the first filter screen comprises a first cylindrical filter screen and a bottom filter screen located at the bottom end of the first cylindrical filter screen, the first cylindrical filter screen is arranged around the valve seat core, and the bottom filter screen directly or indirectly abuts against the partition component in the axial direction; the valve device further comprises an elastic component, the elastic component is directly or indirectly pre-compressed between the bottom filter screen and the valve seat core.

2. The valve device of claim 1, wherein The first filter unit comprises an annular first clamp, the first clamp is limitingly connected with the first cylindrical filter screen, the bottom filter screen of the first filter screen has a filter screen through hole, the valve seat core passes through the first filter screen through hole, and the first clamp and the inner wall of the valve body are in sealing fit.

3. The valve device of claim 2, wherein The first clamp is in interference fit with the inner wall of the valve body; and / or, the first clamp has an annular groove, and the top end of the first cylindrical filter screen is clamped in the annular groove of the first clamp.

4. The valve device of claim 2, wherein The valve seat core is provided with an annular step portion facing the partition component in the axial direction, and the elastic component is pressed between the step portion and the bottom filter screen.

5. The valve device of claim 4, wherein The elastic component is a spiral check ring with an opening, or the elastic component is a disc spring, or the elastic component is a spring.

6. Valve device according to any of claims 1-5, characterized in that The diameter of the first cylindrical filter screen gradually increases in the axial direction away from the partition component.

7. Valve device according to any of claims 1-5, characterized in that The valve body assembly further comprises a second filter unit, and the second filter unit is located in the second chamber.

8. The valve device of claim 7, wherein The valve body comprises a first valve body part and a second valve body part, the first valve body part and the partition component are in one-piece structure, the first valve body part is in cylindrical structure, and the partition component is connected to the bottom of the first valve body part; the partition component is provided with a mounting hole penetrating in the axial direction, and the valve seat core is inserted into the mounting hole; the second valve body part is connected with the first valve body part, the inner cavity of the first valve body part comprises the first chamber, and the inner cavity of the second valve body part comprises the second chamber.

9. The valve device of claim 7, wherein The second filter unit comprises a second filter screen and an annular second clamp, the second filter screen comprises a second cylindrical filter screen and a top filter screen located at the top end of the second cylindrical filter screen, the second clamp is limitingly connected with the second cylindrical filter screen, and the second clamp and the inner wall of the second valve body part are in sealing fit.

10. The valve device of claim 9, wherein The second clamp is in interference fit with the inner wall of the second valve body part; and / or, the second clamp has an annular groove, and the bottom end of the second cylindrical filter screen is clamped in the annular groove of the second clamp.

11. The valve device of claim 10, wherein The second valve body part comprises a sleeve and a first flange extending in the radial direction along the bottom of the sleeve, the second clamp is in interference fit with the inner wall of the sleeve and abuts against the first flange.

12. The valve device of claim 11, wherein, The second cylindrical filter screen gradually increases in diameter in a direction away from the partition component.

13. The valve device of claim 11, wherein The sleeve is provided with a pressing part corresponding to the position of the top end of the second clamp, which presses the top end of the second clamp in the radial direction, and the pressing part is formed by inwardly recessing the outer sidewall of the sleeve.

14. Valve device according to any of claims 1-5, characterized in that The partition component is provided with a mounting hole, the valve core seat includes a fitting part, a first step part and a second step part, the fitting part is tightly fitted with the hole wall corresponding to the mounting hole, the first step part is closer to the fitting part than the second step part, the first step part is abutted and welded with the end surface of the partition component, and the elastic component is directly or indirectly pre-compressed between the bottom filter screen and the second step part.

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