A combination valve

Abstract

A combination valve includes a first valve component, a second valve component and a valve block, the first valve component and the second valve component are both assembled with the valve block, the valve block includes a first valve block cavity, a second valve block cavity, a first bypass channel and a second bypass channel, the valve block also includes a first channel, a second channel, a third channel and a fourth channel, the fourth channel includes a first section and a second section, the second channel is connected to the first valve block cavity or the first bypass channel through the first section, the first channel is connected to the first valve block cavity or the first bypass channel, the second channel is connected to the second valve block cavity or the second bypass channel through the second section, and the third channel is connected to the second valve block cavity or the second bypass channel; the combination valve structure is relatively simple and compact, which is conducive to saving occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, in particular to a combination valve. Background Art

[0002] In air-conditioning systems, if the functions of throttling and large flow conduction are to be achieved, a combination of an expansion valve and a solenoid valve is often required.

[0003] With the increasing performance requirements of air-conditioning systems and the increasing requirements for compact structures of air-conditioning systems, and also based on cost considerations, providing a combination valve with a relatively simple and compact structure that is conducive to saving space is a technical problem that currently needs to be solved by technical personnel in this field. Summary of the Invention

[0004] The object of the present invention is to provide a combination valve with a relatively simple and compact structure, which is conducive to saving occupied space.

[0005] To achieve the above object, one embodiment of the present invention adopts the following technical solution:

[0006] A combination valve comprises a first valve component, a second valve component and a valve block, wherein the first valve component and the second valve component are both assembled with the valve block, the valve block comprises a first valve block cavity, a second valve block cavity, a first bypass channel and a second bypass channel, at least a portion of the first valve component is located in the first valve block cavity, and at least a portion of the second valve component is located in the second valve block cavity, the valve block further comprises a first channel, a second channel, a third channel and a fourth channel, the fourth channel comprises a first section and a second section, the second channel is communicated with the first valve block cavity or the first bypass channel through the first section, the first channel is communicated with the first valve block cavity or the first bypass channel, the second channel is communicated with the second valve block cavity or the second bypass channel through the second section, and the third channel is communicated with the second valve block cavity or the second bypass channel.

[0007] The combination valve includes a first valve component, a second valve component and a valve block, the first valve component and the second valve component are both assembled with the valve block, the valve block includes a first valve block cavity, a second valve block cavity, a first bypass channel, a second bypass channel, a first channel, a second channel, a third channel and a fourth channel, the fourth channel includes a first section and a second section, the second channel is connected to the first valve block cavity or the first bypass channel through the first section, the first channel is connected to the first valve block cavity or the first bypass channel, the second channel is connected to the second valve block cavity or the second bypass channel through the second section, and the third channel is connected to the second valve block cavity or the second bypass channel; the structure is relatively simple and compact, which is conducive to saving occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1This is a schematic diagram of a three-dimensional structure of an embodiment of an electric valve;

[0009] Figure 2 yes Figure 1 A cross-sectional structural diagram of the electric valve in the fully closed state;

[0010] Figure 3 yes Figure 2 A schematic cross-sectional structure diagram of the valve body of the electric valve;

[0011] Figure 4 yes Figure 2 A three-dimensional structural diagram of the valve seat of the electric valve;

[0012] Figure 5 yes Figure 4 A schematic diagram of the cross-section structure of the middle valve seat;

[0013] Figure 6 yes Figure 2 A three-dimensional structural diagram of the piston assembly of the electric valve;

[0014] Figure 7 yes Figure 6 A schematic cross-sectional view of an embodiment of a piston assembly of an electric valve;

[0015] Figure 8 yes Figure 6 A schematic cross-sectional view of another embodiment of a piston assembly of an electric valve;

[0016] Figure 9 yes Figure 1 A schematic cross-sectional view of the electric valve in the first throttling state;

[0017] Figure 10 yes Figure 1 A cross-sectional structural diagram of the electric valve in the fully open state;

[0018] Figure 11 yes Figure 1 A schematic cross-sectional view of the electric valve in the second throttling state;

[0019] Figure 12 It is a schematic diagram of a three-dimensional structure of the first embodiment of the combination valve;

[0020] Figure 13 yes Figure 12 A cross-sectional structural diagram of the combination valve;

[0021] Figure 14 yes Figure 12 A schematic diagram of the three-dimensional structure of the valve block of the middle combination valve from one perspective;

[0022] Figure 15 yes Figure 12 A schematic diagram of the three-dimensional structure of the valve block of the middle combination valve from another perspective;

[0023] Figure 16 yes Figure 14 A cross-sectional structural diagram of the middle valve block;

[0024] Figure 17 yes Figure 12 A front view structural diagram of the combination valve;

[0025] Figure 18 yes Figure 17 Schematic diagram of the cross-sectional structure of the combination valve along the AA plane;

[0026] Figure 19 yes Figure 17 Schematic diagram of the cross-sectional structure of the combination valve along the BB plane;

[0027] Figure 20a yes Figure 17 The cross-sectional structure diagram of the combination valve along the CC plane is shown in FIG. 1 , where the arrows indicate the approximate flow direction of the working medium in one working mode;

[0028] Figure 20b yes Figure 17 The cross-sectional structure diagram of the combination valve along the CC plane is shown in FIG. 1 , and the arrows indicate the approximate flow direction of the working medium in another working mode;

[0029] Figure 21 1 is a schematic cross-sectional view of a second embodiment of a combination valve;

[0030] Figure 22 yes Figure 21 A schematic diagram of the three-dimensional structure of the valve block of the middle combination valve from one perspective;

[0031] Figure 23 yes Figure 21 A schematic diagram of the three-dimensional structure of the valve block of the middle combination valve from another perspective;

[0032] Figure 24 yes Figure 22 A cross-sectional structural diagram of the middle valve block;

[0033] Figure 25 yes Figure 21 A front view structural diagram of the combination valve;

[0034] Figure 26 yes Figure 25 Schematic diagram of the cross-sectional structure of the combination valve along the DD plane;

[0035] Figure 27 yes Figure 25 Schematic diagram of the cross-sectional structure of the combination valve along the EE plane;

[0036] Figure 28a yes Figure 25 The cross-sectional structure diagram of the combination valve along the FF plane in FIG. 1 shows the approximate flow direction of the working medium in one working mode.

[0037] Figure 28b yes Figure 25 The cross-sectional structure diagram of the combination valve along the FF plane, the arrows indicate the approximate flow direction of the working medium in another working mode;

[0038] Figure 29 It is a front view structural schematic diagram of the third embodiment of the combination valve. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The directional nouns described in this specification are explained according to the directional relationships in the accompanying drawings or the corresponding directional relationships in the drawings.

[0040] Combine Figure 1-Figure 2 The electric valve 100 includes a valve body 1, a stator assembly 2, a rotor assembly 3, a valve seat 4, and a valve core 5. The valve seat 4 is connected to the valve body 1, and the valve core 5 cooperates with the valve seat 4. The stator assembly 2 is located on the periphery of the rotor assembly 3. The electric valve also includes a sleeve 81 located between the stator assembly 2 and the rotor assembly 3. The electric valve also includes an electronic control box 82, which houses an electronic control board. The stator assembly 2 is electrically and / or signal-connected to the electronic control board. During operation, the electric valve controls the current flowing through the windings of the stator assembly 2 to vary according to a predetermined pattern, thereby controlling the stator assembly 2 to generate a varying excitation magnetic field. The rotor assembly 3 rotates under the action of the excitation magnetic field, driving the valve core 5 to move relative to the first valve port 41. The valve core 5 cooperates with the first valve port 41 to adjust the flow area of ​​the throttling channel formed between the valve core 5 and the first valve port 41. In this embodiment, the first valve port 41 is formed on the valve seat 4. However, in other embodiments, the valve port 41 may also be formed on the valve body 1. The electric valve also includes a piston assembly 6, which is located below the valve seat 4. A first spring 83 is provided between the piston assembly 6 and the valve seat 4. One end of the first spring 83 abuts the valve seat 4, and the other end of the first spring 83 abuts the piston assembly 6. The first spring 83 is in a compressed state.

[0041] Combine Figure 2 、 Figure 3 The valve body 1 includes a first flow channel 11, a second flow channel 12, and a valve body cavity 13. At least part of the valve seat 4 is located in the valve body cavity 13, the piston assembly 6 is located in the valve body cavity 13, and the valve seat 4 is located above the piston assembly 6. The electric valve also includes an accommodating space 15, which includes the space between the piston assembly 6 and the valve seat 4. The first spring 83 is located in the accommodating space 15. Figure 3The valve body cavity 13 includes a first valve body cavity 131, a second valve body cavity 132 and a third valve body cavity 133. The inner diameter of the inner circumferential wall of the first valve body cavity is larger than the inner diameter of the inner circumferential wall of the second valve body cavity, and the inner diameter of the inner circumferential wall of the second valve body cavity is larger than the inner diameter of the inner circumferential wall of the third valve body cavity. The valve body 1 further includes a third flow channel 16, a second valve port 17, a third valve port 18 and a valve body lower cavity 14. The third flow channel 16 communicates with the valve body cavity 13 and the valve body lower cavity 14. The third flow channel 16 is located between the valve body cavity 13 and the valve body lower cavity 14. The second valve port 17 is a connection port between the third flow channel 16 and the valve body cavity 13. The third valve port 18 is a connection port between the third flow channel 16 and the valve body lower cavity 14. In this embodiment, the third flow channel 16 is located between the bottom wall of the third valve body cavity and the top wall of the valve body lower cavity. The first flow channel 11 is communicated with the third valve body cavity 133, the second flow channel 12 is communicated with the valve body lower cavity 14, and the valve body lower cavity 14 is connected through the third flow channel. The bypass channel 16 is connected to the third valve body cavity 133. The valve body 1 also includes a bypass channel 19. One end of the bypass channel 19 is located at the bottom wall of the second valve body cavity, and the other end is located at the side wall of the second flow channel. The bypass channel 19 connects the second valve body cavity 132 and the second flow channel 12. One end of the bypass channel 19 is connected to the second valve body cavity 132, and the other end of the bypass channel 19 is connected to the second flow channel 12. In this embodiment, the bypass channel 19 is roughly vertically arranged, which is conducive to facilitating the processing of the bypass channel 19. Of course, in other embodiments, it may not be vertically arranged. In other embodiments, the bypass channel may be composed of two or more sections of channels.

[0042] Combine Figure 2-Figure 5The valve seat 4 includes a flange portion 42, which protrudes radially toward the valve seat 4. The outer periphery of the flange portion 42 is clearance-matched with the inner peripheral wall of the first valve body cavity forming the first valve body cavity 131. At least one first sealing member 421 is arranged between the flange portion 42 and the inner peripheral wall of the first valve body cavity. At least the outer periphery of the flange portion 42 or one of the inner peripheral walls of the first valve body cavity is provided with a first accommodating portion 422 for accommodating the first sealing member 421. The first accommodating portion 422 defines the position of the first sealing member. The provision of the first sealing member 421 is beneficial to reducing the risk of the working medium flowing through the gap between the flange portion 42 and the inner peripheral wall of the first valve body cavity, and is beneficial to reducing the risk of the working medium leaking to the outside of the electric valve. The valve seat 4 also includes a valve seat lower portion 43, which is located below the flange portion 42. The outer periphery of the valve seat lower portion 43 is clearance-matched with the inner peripheral wall of the third valve body cavity surrounding the third valve body cavity 133. At least one second sealing member 431 is disposed between the valve seat lower portion 43 and the inner peripheral wall of the third valve body cavity. At least one of the valve seat lower portion 43 and the inner peripheral wall of the third valve body cavity is provided with a second accommodating portion 432 for accommodating the second sealing member 431. The second accommodating portion 432 defines the position of the second sealing member 431. The provision of the second sealing member 431 helps reduce the flow of working medium through the gap between the valve seat lower portion 43 and the inner peripheral wall of the third valve body cavity. In this embodiment, the valve seat 4 is axially limited to the valve body 1 by a pressure block 84. The outer periphery of the pressure block 84 is provided with an external thread, and the inner peripheral wall of the valve body 1 surrounding the first valve body cavity is provided with an internal thread. The pressure block 84 and the valve body 1 are connected by threads. In this embodiment, the pressure block 84 abuts against the upper end side of the flange portion 42, and the lower end side of the flange portion 42 abuts against the bottom wall of the first valve body cavity surrounding the first valve body cavity 131. In this embodiment, at least one annular protrusion can also be provided on the lower end side of the flange portion 42. The hardness of the annular protrusion is greater than the hardness of the bottom wall of the first valve body cavity. The annular protrusion can be embedded in the bottom wall of the first valve body cavity, further improving the sealing performance and further reducing the risk of leakage of the working medium. The first sealing member may also be omitted, and the annular protrusion may be used for sealing. Alternatively, the annular protrusion may not be provided in other embodiments.

[0043] Combine Figure 2-5In this embodiment, the valve seat 4 also includes a valve seat upper cavity 44 and a valve seat lower cavity 45. The opening of the valve seat upper cavity 44 faces the top of the valve seat 4, and the opening of the valve seat lower cavity 45 faces the bottom of the valve seat 4. The first valve port 41 of the valve seat 4 is located on the bottom wall of the valve seat upper cavity. The valve seat upper cavity 44 and the valve seat lower cavity 45 are connected through the first valve port 41. The rotor assembly 3 can drive the valve core 5 to move relative to the valve seat 4. The valve core 5 cooperates with the first valve port 41 to adjust the size of the flow area of ​​the throttling channel formed between the valve core 5 and the first valve port 41. The valve seat 4 also includes at least one lateral channel 46. In this embodiment, the lateral channel 46 is located at the valve seat lower portion 43, and the flange portion 42 is located above the lateral channel 46. In this embodiment, the lateral channel 46 includes a first valve seat flow channel 461 and a second valve seat flow channel 462. The first valve seat flow channel 461 and the second valve seat flow channel 462 are coaxially arranged, one end of the first valve seat flow channel 461 is located at the peripheral side wall of the valve seat upper cavity, and the other end of the first valve seat flow channel 461 is located at the peripheral side wall of the valve seat lower portion 43, one end of the second valve seat flow channel 462 is located at the peripheral side wall of the valve seat upper cavity, and the other end of the second valve seat flow channel 462 is located at the peripheral side wall of the valve seat lower portion 43; of course, the lateral channel 46 may also include one of the first valve seat flow channel 461 and the second valve seat flow channel 462, and the lateral channel 46 may also include multiple first valve seat flow channels 461 and / or second valve seat flow channels 462.

[0044] Combine Figure 2-Figure 5 The electric valve further includes an annular channel 85, which comprises the space between a portion of the inner circumferential wall of the valve body cavity 13 and a portion of the outer circumferential wall of the valve seat 4. In this embodiment, the outer diameter of the portion of the outer circumferential wall of the valve seat lower portion 43 containing the lateral channel 46 is smaller than the inner diameter of the inner circumferential wall of the second valve body cavity. An annular channel 85 is formed between the outer circumferential wall of the portion of the valve seat lower portion 43 containing the lateral channel 46 and the inner circumferential wall of the second valve body cavity. The lateral channel 46 communicates with the bypass channel 19 via the annular channel 85. In this embodiment, the provision of the valve seat lower cavity 45 allows a portion of the first spring 83 to be accommodated therein, which helps prevent significant axial displacement of the first spring 83 and improves its stability. Of course, in other embodiments, the valve seat 4 may not be provided with the valve seat lower cavity 45, with the first valve port 41 located at the bottom of the valve seat.

[0045] Combine Figure 2 、 Figure 6-Figure 7The piston assembly 6 includes a piston body 61, a piston ring 62, and a first sealing block 63. The piston body 61 includes a first annular groove 611 located on the outer periphery of the piston body 61. The piston ring 62 is accommodated in the first annular groove 611. The provision of the piston ring 62 helps reduce the flow of working medium through the gap between the piston body 61 and the inner peripheral wall of the third valve body cavity, and also helps prevent the piston body 61 from directly contacting the inner peripheral wall of the third valve body cavity, thereby protecting the piston body 61. The piston body 61 also includes an upper piston chamber 612 and a sealing block accommodating chamber 613. The upper piston chamber 612 is located above the piston body and is located on different sides of the piston body 61. This allows a section of the first spring 83 to be accommodated in the upper piston chamber 612, which helps prevent large axial displacement of the first spring 83 and improves the stability of the first spring 83. Of course, in other embodiments, the upper piston chamber 612 may not be provided. In this embodiment, the piston assembly 6 further includes a stopper 64, the outer diameter of which is smaller than the outer diameter of the first sealing block 63. The stopper 64 cooperates with the piston body 61 to limit the position of the first sealing block. In this embodiment, the stopper 64 is made of metal, but in other embodiments, it can also be made of plastic or other materials. The piston body also includes a mounting portion 65 and a bent portion 66. After the first sealing block 63 is mounted on the mounting portion 65, the stopper 64 is then mounted on the mounting portion 65, and the bent portion 66 is formed by stamping. The bent portion 66 abuts against the stopper 64 to limit the position of the stopper 64 relative to the piston body 1, thereby preventing the first sealing block 63 from being dislodged. In other embodiments, the first sealing block 63 can also be fixed by riveting or bolts. Under the action of the first spring 83, the piston assembly 6 can abut against the second valve port 17, thereby closing the second valve port 17. In this embodiment, the abutment of the first sealing block 63 with the second valve port 17 is conducive to improving the sealing performance. The piston body 61 also includes at least one piston hole 614, which vertically passes through the piston body 61 and connects the upper and lower ends of the piston body 61. In this embodiment, there are three piston holes 614. The outer peripheral wall of the piston assembly 6 slides with the inner peripheral wall of the third valve body cavity surrounding the third valve body cavity 133. There is a certain distance between the outer peripheral wall of the piston assembly 6 and the inner peripheral wall of the third valve body cavity. The piston ring 62 improves the sealing performance, reduces the flow of working medium through the gap between the piston body 61 and the inner peripheral wall of the third valve body cavity, and allows the working medium to pass through the piston hole 614 as much as possible. Figure 8 In another embodiment of the piston assembly, the piston assembly includes a spring wire 615, which can provide support for the piston ring 62, thereby improving the reliability of the piston ring 62 and preventing the piston body 61 from directly contacting the inner wall of the third valve body cavity 133. Of course, the spring wire can be omitted if the piston ring 62 is strong enough.

[0046] Combine Figure 2 、 Figure 3 The electric valve further includes a one-way valve assembly 7, which is located in the lower chamber 14 of the valve body. The one-way valve assembly 7 includes a one-way valve core 71. The movement direction of the one-way valve core 71 is not parallel to the extension direction of the second flow channel 12. The one-way valve core 71 cooperates with the third valve port 18 to open or block the third valve port 18. Compared with the solution in which the one-way valve assembly 7 is located in the second channel 12, this solution helps reduce the flow resistance of the working medium. In this embodiment, the first channel 11 and the second channel 12 extend radially of the electric valve, and the valve core 5, piston assembly 6, and the one-way valve assembly 7 are arranged axially of the electric valve. The lower chamber 14 of the valve body is perpendicular to the extension direction of the second flow channel 12. The movement direction of the one-way valve core 71 is perpendicular to the extension direction of the second flow channel 12. The channel formed by the one-way valve core 71 leaving the third valve port 18 is located in the lower chamber 14 of the valve body and directly communicates with the second channel 12.

[0047] Combine Figure 2 、 Figure 3In this embodiment, the one-way valve assembly 7 is located below the third valve port 18. The one-way valve assembly 7 also includes a fixing member 72 and a second spring 73. The one-way valve spool 71, the second spring 73 and the fixing member 72 are arranged along the axial direction of the electric valve. One end of the second spring 73 abuts against the one-way valve spool 71, and the other end of the second spring 73 abuts against the fixing member 72. The one-way valve spool 71 has a second sealing block 711. Under the action of the second spring 73, the one-way valve spool 71 can abut against the third valve port 18, thereby closing the third valve port 18. The provision of the second sealing block 711 abutting against the third valve port 18 is beneficial to improving the sealing performance. The fixing member 72 includes a support portion 721 and a first flange portion 722. The outer diameter of the first flange portion 722 is larger than the outer diameter of the support portion 721. The support portion 721 is cylindrical and has a support cavity 7211. A portion of the one-way valve core 71 is located in the support cavity 7211. The inner circumferential wall of the support portion 721 provides guidance for the one-way valve core 71, thereby improving the stability of the one-way valve core 71. The valve body 1 also includes a mounting portion 141. The mounting portion 141 includes a first mounting portion 1411 and a second mounting portion 1412. The first mounting portion 1411 has an internal thread, and the outer circumference of the support portion 721 has an external thread. The fixing member 72 is fixed to the valve body 1 through a threaded connection. The inner circumferential wall of the second mounting portion 1412 provides guidance for the one-way valve core 71, thereby improving the stability of the one-way valve core 71. At least one sealing member 74 is provided between the first flange portion 722 and the bottom wall of the valve body 1 for sealing. The bottom wall of the valve body 1 and / or the first flange portion 722 are provided with at least one groove for accommodating the sealing member 74. The fixing member 72 is capable of sealing the valve body lower cavity 14. The one-way valve spool 71 is located in the valve body lower cavity 14. The movement direction of the one-way valve spool 71 is perpendicular to the extension direction of the second flow channel 12. Compared to a solution in which the axis of the one-way valve spool 71 coincides with the axis of the second flow channel 12, this solution helps reduce resistance and lower pressure loss.

[0048] When the valve core 5 leaves the first valve port 41, the first flow channel 11 can communicate with the valve seat upper cavity 44 through the piston hole 614, the accommodating space 15, and the gap between the first valve port 41 and the valve core 5. The valve seat upper cavity 44 can communicate with the second flow channel 12 through the lateral channel 46, the annular channel 85, and the bypass channel 19. When the valve core 5 leaves the first valve port 41, the piston assembly 6 leaves the second valve port 17, and the one-way valve core 71 leaves the third valve port 18, the first flow channel 11 can communicate with the second flow channel 12 through the second valve port 17, the third flow channel 16, and the third valve port 18.

[0049] Combine Figure 2 、 Figure 3 , Figure 2It is a schematic diagram of the electric valve in a fully closed state. The first flow channel 11 serves as the inlet flow channel of the working medium, and the second flow channel 12 serves as the outlet channel of the working medium. At this time, the valve core 5 abuts against the first valve port 41, and the first valve port 41 is closed. The working medium enters the accommodating space 15 through the piston hole 614 of the piston assembly 6. The accommodating space 15 includes the space between the piston assembly 6 and the valve seat 4. The piston assembly 6 abuts against the second valve port 17 under the action of the first spring 83, the weight of the piston assembly 6 itself and the pressure difference of the working medium, and the second valve port 17 is closed. The one-way valve core 71 abuts against the third valve port 18, and the third valve port 18 is closed. The first flow channel 11 is neither connected to the upper cavity 44 of the valve seat nor to the lower cavity 14 of the valve body. The first flow channel 11 is not connected to the second flow channel 12.

[0050] See also Figure 9 , Figure 9 This is a schematic diagram of the electric valve in its first throttled state. The first flow channel 11 serves as the inlet flow channel for the working medium, and the second flow channel 12 serves as the outlet flow channel for the working medium. The arrow indicates the approximate flow direction of the working medium. The valve core 5 moves a certain distance away from the first valve port 41, opening the first valve port 41. However, at least a portion of the valve core 5 remains within the first valve port 41. In this first throttled state, the throttle area of ​​the throttle passage formed between the valve core 5 and the first valve port 41 is smaller than the cross-sectional area of ​​the first valve port 41. In this first throttled state, the piston assembly 6, under the action of the first spring 83, the weight of the piston assembly 6, and the pressure differential of the working medium, abuts against the second valve port 17. At this point, the second valve port 17 and the third valve port 18 are both closed. The first flow channel 11 communicates with the second flow channel 12 via the piston hole 614 of the piston assembly 6, the accommodating space 15, the first valve port 41, the lateral channel 46, the annular channel 85, and the bypass channel 19. When the high-pressure working medium enters the first flow channel 11, it is throttled and depressurized when a throttling channel is formed between the valve core 5 and the first valve port 41. At this time, the electric valve can realize the throttling function. Figure 10 , Figure 10 This is a schematic diagram of the electric valve in the fully open state. The first flow channel 11 serves as the inlet channel of the working medium, and the second flow channel 12 serves as the outlet channel of the working medium. The arrows indicate the approximate flow direction of the working medium. Figure 9On the basis of the technical solution, at this time the valve core 5 is away from the first valve port 41, and the valve core 5 is entirely located outside the first valve port 41, the first valve port 41 is fully opened, and the first flow channel 11 can be connected in sequence through the piston hole 614 of the piston assembly 6, the accommodating space 15, the first valve port 41, the lateral channel 46, the annular channel 85, the bypass channel 19 and the second flow channel 12. The flow area of ​​the throttling channel formed between the valve core 5 and the first valve port 41 is greater than the flow area of ​​the throttling channel formed between the valve core 5 and the first valve port 41 in the first throttling state. As the flow area at the valve port 41 increases, the pressure in the accommodating space 15 decreases, and the pressure difference of the working medium acting on the upper and lower end faces of the piston assembly 6 further increases. The piston assembly 6 is away from the second valve port 17, the second valve port 17 is opened, and the piston assembly 6 compresses the first spring 83 upward; one-way valve Under the action of the pressure difference of the working medium, the valve core 71 compresses the second spring 73 downward, the third valve port 18 of the accommodating space is opened, and the first flow channel 11 is connected with the second flow channel 12 through the third flow channel 16. Specifically, the first flow channel 11 is connected with the second flow channel 12 through the second valve port 17, the third flow channel 16, the third valve port 18, and the valve body lower cavity 14 in sequence. Since the resistance of the working medium passing through the second valve port 17, the third flow channel 16, the third valve port 18, and the valve body lower cavity 14 in sequence is less than the flow resistance of the working medium passing through the piston hole 614, the accommodating space 15, the first valve port 17, the lateral channel 46, the annular channel 85, and the bypass channel 19 in sequence, in this state, most of the working medium flows out through the second valve port 17, the third flow channel 16, the third valve port 18, the valve body lower cavity 14, and the second flow channel 12, thereby realizing large flow regulation. The one-way valve core 71 is located in the lower cavity 14 of the valve body. The movement direction of the one-way valve core 71 is set perpendicular to the extension direction of the second flow channel 12. Compared with the solution of aligning the axis of the one-way valve core 71 with the axis of the second flow channel 12, it is beneficial to reduce resistance and reduce pressure loss.

[0051] See also Figure 11 , Figure 11It is a schematic diagram of the electric valve in the second throttling state, with the second flow channel 12 as the inlet channel of the working medium and the first flow channel 11 as the outlet channel of the working medium. The arrow indicates the approximate flow direction of the working medium. When the high-pressure working medium flows into the second flow channel 12, the one-way valve spool 71 abuts against the third valve port 18 under the action of the pressure difference of the high-pressure working medium, and the third valve port 18 is closed. At this time, the valve core 5 moves a certain distance away from the first valve port 41, and the first valve port 41 is opened, but at least a part of the valve core 5 is still located in the first valve port 41. In the second throttling state, the throttling area of ​​the throttling channel formed between the valve core 5 and the first valve port 41 is smaller than the cross-sectional area of ​​the first valve port 41. Under the action of first spring 83, the weight of piston assembly 6, and the pressure differential of the working medium, piston assembly 6 abuts against second valve port 17, closing second valve port 17. Second flow channel 12 can then communicate with first flow channel 11 via bypass channel 19, annular channel 85, lateral channel 46, first valve port 41, accommodating space 15, and piston hole 614. The electric valve also has a second fully closed state. When second flow channel 12 serves as the inlet channel for the working medium and first flow channel 11 serves as the outlet channel for the working medium, the electric valve can also achieve a fully closed state when first valve port 41 is closed.

[0052] Combine Figure 12-Figure 19 、 Figure 20a 、 Figure 20bIn a first embodiment of a combination valve 200, the combination valve 200 includes a first valve component 100a, a second valve component 100b, and a valve block 1a. The first valve component 100a and the second valve component 100b are both assembled with the valve block 1a. A portion of the valve block 1a serves as the valve body of the first valve component 100a, and a portion of the valve block 1a serves as the valve body of the second valve component 100b. The first valve component 100a and a portion of the valve block 1a serve as the above-mentioned electric valve 100, and the second valve component 100b and a portion of the valve block 1a serve as another one or more electric valves 100. The valve block 1a includes a first valve block chamber 13a, a second valve block chamber 13b, a first bypass channel 19a, and a second bypass channel 19b. At least a portion of the first valve component 100a is located in the first valve block chamber 13a, and at least a portion of the second valve component 100b is located in the second valve block chamber 13b. The valve block 1a includes a first channel 101a, a second channel 102a, a third channel 103a and a fourth channel 104a, the fourth channel 104a includes a first section 1041a and a second section 1042a, the second channel 102a is connected to the first valve block chamber 13a through the first section 1014a, the first channel 101a is connected to the first bypass channel 19a, the second channel 102a is connected to the second valve block chamber 13b through the second section 1042a, and the third channel 103a is connected to the second bypass channel 19b. In this embodiment, the opening of the first section 1041a of the fourth channel 104a is blocked by a block 106a. The block 106a has an external thread, and the inner peripheral wall of the first section has an internal thread. The block 106a and the valve block 1a are fixed by a threaded connection. The threaded connection can improve the strength of the block 106a. There is at least one sealing component between the block 106a and the valve block 1a for sealing, which is beneficial to improving the sealing and preventing the working medium from leaking. Of course, the first section 1041a can also be blocked by other methods; the opening of the first section 1041a of the fourth channel 104a can also be blocked by a pressure relief valve. When the pressure in the fourth channel 104a reaches a certain value, the pressure relief valve is flushed open, thereby reducing the pressure and playing a protective role.

[0053] Combine Figures 12-19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3The first valve component 100a includes a first stator assembly 2a, a first rotor assembly 3a, a first valve seat 4a, and a first valve core 5a. The first valve seat 4a includes a first valve seat upper chamber 44a, a first valve seat valve port 41a, and a first lateral channel 46a. The first valve core 5a cooperates with the first valve seat valve port 41a to adjust the flow area of ​​the throttling channel formed between the first valve core 5a and the first valve seat valve port 41a. The combination valve also includes a first annular channel 85a, which comprises the space between a portion of the inner circumferential wall of the first valve block chamber 13a and a portion of the outer circumferential wall of the first valve seat 4a. The first valve seat upper chamber 44a of the annular channel communicates with the first annular channel 85a via a first lateral channel 46a. The first annular channel 85a communicates with the first channel 101a via a first bypass channel 19a.

[0054] Combine Figures 12-19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3 The first valve component 100a also includes a first piston assembly 6a, which is located in the first valve block cavity 13a. The first piston assembly 6a has a first piston hole 614a. When the first valve core 5a leaves the first valve seat valve port 41a, the first valve seat upper cavity 44a is connected to the first section 1041a through the first valve seat valve port 41a and the first piston hole 614a; when the first valve core 5a leaves the first valve seat valve port 41a, the second channel 102a is connected to the first channel 101a through the first section 1041a, the first piston hole 614a, the first valve seat valve port 41a, the first valve seat upper cavity 44a, the first annular channel 85a, and the first bypass channel 19a. The valve block 1a also includes a first valve block lower chamber 14a, which is connected to the first channel 101a. The valve block 1a also includes a first valve block valve port 17a, which is located on the bottom wall of the first valve block chamber. The first piston assembly 6a can abut against the first valve block valve port 17a to seal the first valve block valve port 17a.

[0055] Combine Figure 12-Figure 19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3The first valve component 100a also includes a first one-way valve assembly 7a, which is located in the first valve block lower chamber 14a. The first one-way valve assembly 7a includes a first one-way valve spool 71a and a first fixing member 72a. The valve block 1a also includes a second valve block valve port 18a, which is located on the top wall of the first valve block lower chamber. The first one-way valve spool 71a can abut against the second valve block valve port 18a to seal the second valve block valve port 18a. When the first piston assembly 6a leaves the first valve block valve port 17a and the first one-way valve assembly 7a leaves the second valve block valve port 18a, the second channel 102a is connected to the first channel 101a through the first section 1041a, the first valve block valve port 17a, the second valve block valve port 18a, and the first valve block lower chamber 14a. When the first valve core 5a leaves the first valve seat valve port 41a, the first piston assembly 6a abuts against the first valve block valve port 17a, and the first one-way valve valve core 71a abuts against the second valve block valve port 18a, the second channel 102a is connected to the first channel 101a through the first section 1041a, the first piston hole 614a, the first valve seat valve port 41a, the first valve seat upper cavity 44a, the first annular channel 85a, and the first bypass channel 19a.

[0056] Combine Figure 12-Figure 19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3 The second valve component 100b includes a second stator assembly 2b, a second rotor assembly 3b, a second valve seat 4b, and a second valve core 5b. The second valve seat 4b includes a second valve seat upper chamber 44b, a second valve seat valve port 41b, and a second lateral channel 46b. The second valve core 5b cooperates with the second valve seat valve port 41b to adjust the flow area of ​​the throttling channel formed between the second valve core 5b and the second valve seat valve port 41b. The combination valve also includes a second annular channel 85b, which comprises the space between a portion of the inner circumferential wall of the second valve block chamber 13b and a portion of the outer circumferential wall of the second valve seat 4b. The second valve seat upper chamber 44b of the annular channel communicates with the second annular channel 85b via a second lateral channel 46b. The second annular channel 85b communicates with the third channel 103a via a second bypass channel 19b.

[0057] Combine Figures 12-19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3The second valve component 100b also includes a second piston assembly 6b, which is located in the second valve block cavity 13b. The second piston assembly 6b has a second piston hole 614b. When the second valve core 5b leaves the second valve seat valve port 41b, the second valve seat upper cavity 44b is connected to the second section 1042a through the second valve seat valve port 41b and the second piston hole 614b; when the second valve core 5b leaves the second valve seat valve port 41b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the second piston hole 614b, the second valve seat valve port 41b, the second valve seat upper cavity 44b, the second annular channel 85b, and the second bypass channel 19b. The valve block 1a also includes a second valve block lower chamber 14b, which is connected to the third channel 103a. The valve block 1a also includes a third valve block valve port 17b, which is located on the bottom wall of the second valve block chamber. The second piston assembly 6b can abut against the third valve block valve port 17b to seal the third valve block valve port 17b.

[0058] Combine Figure 12-Figure 19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figure 3 The second valve component 100b also includes a second one-way valve assembly 7b, which is located in the second valve block lower chamber 14b. The second one-way valve assembly 7b includes a second one-way valve spool 71b and a second fixing member 72b. The valve block 1a also includes a fourth valve block valve port 18b, which is located on the top wall of the second valve block lower chamber. The second one-way valve spool 71b can abut against the fourth valve block valve port 18b to seal the fourth valve block valve port 18b. When the second piston assembly 6b leaves the third valve block valve port 17b and the second one-way valve assembly 7b leaves the fourth valve block valve port 18b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the third valve block valve port 17b, the fourth valve block valve port 18b, and the second valve block lower chamber 14b. When the second valve core 5b leaves the second valve seat valve port 41b, the second piston assembly 6b abuts against the third valve block valve port 17b, and the second one-way valve valve core 71b abuts against the fourth valve block valve port 18b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the second piston hole 614b, the second valve seat valve port 41b, the second valve seat upper cavity 44b, the second annular channel 85b, and the second bypass channel 19b.

[0059] In this embodiment, the first valve component also includes a first electrical control box, the first electrical control box has a first electrical control board, the wiring terminals led out of the first stator assembly are connected to the first electrical control board, and the first electrical control box has a first connector for connecting to the outside of the device; the second valve component also includes a second electrical control box, the second electrical control box has a second electrical control board, the wiring terminals led out of the second stator assembly are connected to the second electrical control board, and the second electrical control box has a second connector for connecting to the outside of the device.

[0060] Combine Figure 12-Figure 19 、 Figure 20a 、 Figure 20b , while referring to Figure 2 、 Figures 9-11 In the first embodiment of the combination valve, the working modes of the combination valve include a first working mode, a second working mode, and a third working mode:

[0061] In the first working mode, the second channel 102a serves as the working medium inlet channel, and the first channel 101a or the third channel 103a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 9 The first throttle state in Figure 10 When the first valve member 100a is in the fully open state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 9 First throttle state or Figure 10 in the fully open state.

[0062] In the second working mode, the first channel 101a serves as the working medium inlet channel, and the second channel 102a serves as the working medium outlet channel; or the second channel 102a serves as the working medium inlet channel, and the third channel 103a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 11 When the first valve member 100a is in the second throttling state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 9 First throttle state or Figure 10 in the fully open state.

[0063] In the third working mode, the first channel 101a serves as the working medium inlet channel and the second channel 102a serves as the working medium outlet channel; or the third channel 103a serves as the working medium inlet channel and the second channel 102a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 11When the first valve member 100a is in the second throttling state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 11 The second throttling state.

[0064] The combined valve provided by the present invention has a relatively simple and compact structure, which is conducive to saving occupied space.

[0065] Of course, the first embodiment of the combination valve can also realize other working modes, which are not listed here one by one.

[0066] In the first embodiment of the combination valve, other working modes can be achieved by omitting one, two, three or four components among the first piston assembly 6a, the first one-way assembly 7a, the second piston assembly 6b and the second one-way valve assembly 7b.

[0067] Combine Figures 21-27 、 Figure 28a 、 Figure 28bIn a second embodiment of a combination valve 200, the combination valve 200 includes a first valve component 100a, a second valve component 100b, and a valve block 1a. The first valve component 100a and the second valve component 100b are both assembled with the valve block 1a. A portion of the valve block 1a serves as the valve body of the first valve component 100a, and a portion of the valve block 1a serves as the valve body of the second valve component 100b. The first valve component 100a and a portion of the valve block 1a serve as the above-mentioned electric valve 100, and the second valve component 100b and a portion of the valve block 1a serve as another one or more electric valves 100. The valve block 1a includes a first valve block chamber 13a, a second valve block chamber 13b, a first bypass channel 19a, and a second bypass channel 19b. At least a portion of the first valve component 100a is located in the first valve block chamber 13a, and at least a portion of the second valve component 100b is located in the second valve block chamber 13b. The valve block 1a includes a first channel 101a, a second channel 102a, a third channel 103a and a fourth channel 104a, the fourth channel 104a includes a first section 1041a and a second section 1042a, the second channel 102a is connected to the first bypass channel 19a through the first section 1041a, the first channel 101a is connected to the first valve block chamber 13a, the second channel 102a is connected to the second valve block chamber 13b through the second section 1042a, and the third channel 103a is connected to the second bypass channel 19b. In this embodiment, the opening of the first section 1041a of the fourth channel 104a is blocked by a block 106a. The block 106a has an external thread, and the inner peripheral wall of the first section has an internal thread. The block 106a and the valve block 1a are fixed by a threaded connection. The threaded connection can improve the strength of the block 106a. There is at least one sealing component between the block 106a and the valve block 1a for sealing, which is beneficial to improving the sealing and preventing the working medium from leaking. Of course, the first section 1041a can also be blocked by other methods; the opening of the first section 1041a of the fourth channel 104a can also be blocked by a pressure relief valve. When the pressure in the fourth channel 104a reaches a certain value, the pressure relief valve is flushed open, thereby reducing the pressure and playing a protective role.

[0068] Combine Figures 21-27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figure 3The first valve component 100a includes a first stator assembly 2a, a first rotor assembly 3a, a first valve seat 4a, and a first valve core 5a. The first valve seat 4a includes a first valve seat upper chamber 44a, a first valve seat valve port 41a, and a first lateral channel 46a. The first valve core 5a cooperates with the first valve seat valve port 41a to adjust the flow area of ​​the throttling channel formed between the first valve core 5a and the first valve seat valve port 41a. The combination valve also includes a first annular channel 85a, which comprises the space between a portion of the inner circumferential wall of the first valve block chamber 13a and a portion of the outer circumferential wall of the first valve seat 4a. The first valve seat upper chamber 44a of the annular channel communicates with the first annular channel 85a via the first lateral channel 46a. The first annular channel 85a communicates with the first section 1041a via the first bypass channel 19a.

[0069] Combine Figure 21-Figure 27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figure 3 The first valve component 100a also includes a first piston assembly 6a, which is located in the first valve block cavity 13a. The first piston assembly 6a has a first piston hole 614a. When the first valve core 5a leaves the first valve seat valve port 41a, the first valve seat upper cavity 44a is connected to the first section 1041a through the first valve seat valve port 41a and the first piston hole 614a; when the first valve core 5a leaves the first valve seat valve port 41a, the second channel 102a is connected to the first channel 101a through the first section 1041a, the first piston hole 614a, the first valve seat valve port 41a, the first valve seat upper cavity 44a, the first annular channel 85a, and the first bypass channel 19a. The valve block 1a also includes a first valve block lower chamber 14a, which is connected to the first channel 101a. The valve block 1a also includes a first valve block valve port 17a, which is located on the bottom wall of the first valve block chamber. The first piston assembly 6a can abut against the first valve block valve port 17a to seal the first valve block valve port 17a.

[0070] Combine Figures 21-27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figure 3The first valve component 100a also includes a first one-way valve assembly 7a, which is located in the first valve block lower chamber 14a. The first one-way valve assembly 7a includes a first one-way valve spool 71a and a first fixing member 72a. The valve block 1a also includes a second valve block valve port 18a, which is located on the top wall of the first valve block lower chamber. The first one-way valve spool 71a can abut against the second valve block valve port 18a to seal the second valve block valve port 18a. When the first piston assembly 6a leaves the first valve block valve port 17a and the first one-way valve assembly 7a leaves the second valve block valve port 18a, the first channel 101a is connected to the second channel 102a through the first valve block valve port 17a, the second valve block valve port 18a, the first valve block lower chamber 14a, and the first section 1041a. When the first valve core 5a leaves the first valve seat valve port 41a, the first piston assembly 6a abuts against the first valve block valve port 17a, and the first one-way valve valve core 71a abuts against the second valve block valve port 18a, the first channel 101a is connected to the first bypass channel 19a with the second channel through the first piston hole 614a, the first valve seat valve port 41a, the first valve seat upper cavity 44a, the first annular channel 85a, the first bypass channel 19a, and the first section 1041a.

[0071] Combine Figures 21-27 、 Figure 28a 、 Figure 28b ,, and refer to Figure 2 、 Figure 3 The second valve component 100b includes a second stator assembly 2b, a second rotor assembly 3b, a second valve seat 4b, and a second valve core 5b. The second valve seat 4b includes a second valve seat upper chamber 44b, a second valve seat valve port 41b, and a second lateral channel 46b. The second valve core 5b cooperates with the second valve seat valve port 41b to adjust the flow area of ​​the throttling channel formed between the second valve core 5b and the second valve seat valve port 41b. The combination valve also includes a second annular channel 85b, which comprises the space between a portion of the inner circumferential wall of the second valve block chamber 13b and a portion of the outer circumferential wall of the second valve seat 4b. The second valve seat upper chamber 44b of the annular channel communicates with the second annular channel 85b via a second lateral channel 46b. The second annular channel 85b communicates with the third channel 103a via a second bypass channel 19b.

[0072] Combine Figure 21-Figure 27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figure 3The second valve component 100b also includes a second piston assembly 6b, which is located in the second valve block cavity 13b. The second piston assembly 6b has a second piston hole 614b. When the second valve core 5b leaves the second valve seat valve port 41b, the second valve seat upper cavity 44b is connected to the second section 1042a through the second valve seat valve port 41b and the second piston hole 614b; when the second valve core 5b leaves the second valve seat valve port 41b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the second piston hole 614b, the second valve seat valve port 41b, the second valve seat upper cavity 44b, the second annular channel 85b, and the second bypass channel 19b. The valve block 1a also includes a second valve block lower chamber 14b, which is connected to the third channel 103a. The valve block 1a also includes a third valve block valve port 17b, which is located on the bottom wall of the second valve block chamber. The second piston assembly 6b can abut against the third valve block valve port 17b to seal the third valve block valve port 17b.

[0073] Combine Figures 21-27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figure 3 The second valve component 100b also includes a second one-way valve assembly 7b, which is located in the second valve block lower chamber 14b. The second one-way valve assembly 7b includes a second one-way valve spool 71b and a second fixing member 72b. The valve block 1a also includes a fourth valve block valve port 18b, which is located on the top wall of the second valve block lower chamber. The second one-way valve spool 71b can abut against the fourth valve block valve port 18b to seal the fourth valve block valve port 18b. When the second piston assembly 6b leaves the third valve block valve port 17b and the second one-way valve assembly 7b leaves the fourth valve block valve port 18b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the third valve block valve port 17b, the fourth valve block valve port 18b, and the second valve block lower chamber 14b. When the second valve core 5b leaves the second valve seat valve port 41b, the second piston assembly 6b abuts against the third valve block valve port 17b, and the second one-way valve valve core 71b abuts against the fourth valve block valve port 18b, the second channel 102a is connected to the third channel 103a through the second section 1042a, the second piston hole 614b, the second valve seat valve port 41b, the second valve seat upper cavity 44b, the second annular channel 85b, and the second bypass channel 19b.

[0074] In this embodiment, the first valve component further includes a first electric control box, which has a first electric control board, the wiring terminals led out of the first stator assembly are connected to the first electric control board, and the first electric control box has a first socket for connecting to the outside of the device; the second valve component further includes a second electric control box, which has a second electric control board, the wiring terminals led out of the second stator assembly are connected to the second electric control board, and the second electric control box has a second socket for connecting to an external device. Figure 21-Figure 27 、 Figure 28a 、 Figure 28b , while referring to Figure 2 、 Figures 9-11 In the second embodiment of the combination valve, the working modes of the combination valve include a first working mode, a second working mode, and a third working mode:

[0075] In the first working mode, the second channel 102a serves as the working medium inlet channel, and the first channel 101a or the third channel 103a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 11 When the first valve member 100a is in the second throttling state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 9 First throttle state or Figure 10 in the fully open state.

[0076] In the second working mode, the first channel 101a serves as the working medium inlet channel, and the second channel 102a serves as the working medium outlet channel; or the second channel 102a serves as the working medium inlet channel, and the third channel 103a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 9 First throttle state or Figure 10 When the first valve member 100a is in the fully open state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 9 First throttle state or Figure 10 in the fully open state.

[0077] In the third working mode, the first channel 101a serves as the working medium inlet channel and the second channel 102a serves as the working medium outlet channel; or the third channel 103a serves as the working medium inlet channel and the second channel 102a serves as the working medium outlet channel. Figure 2 When the first valve member 100a is in the fully closed state, Figure 9 First throttle state or Figure 10 When the first valve member 100a is in the fully open state; Figure 2 When the second valve member 100b is in the fully closed state, Figure 11 The second throttling state.

[0078] The combined valve provided by the present invention has a relatively simple and compact structure, which is conducive to saving occupied space.

[0079] Of course, the second embodiment of the combination valve can also realize other working modes, which are not listed here one by one.

[0080] In the second embodiment of the combination valve, other working modes can be achieved by omitting one, two, three or four components among the first piston assembly 6a, the first one-way assembly 7a, the second piston assembly 6b and the second one-way valve assembly 7b.

[0081] See also Figure 29 In the third embodiment of the combination valve, compared to the above two embodiments of the combination valve, the first valve component 100a does not include an electrical control box, and the second valve component 100b does not include an electrical control box. The first valve component 100a has a first connector 86a, and the second valve component 100b has a second connector 86b. The terminal connected to the first stator assembly 2a extends to the first connector 86a, and the terminal connected to the second stator assembly 2b extends to the second connector 86b. In this embodiment, the first section of the opening of the fourth channel is blocked by a pressure relief valve 107a, which seals the first section of the opening. When the pressure in the fourth channel reaches a certain value, the pressure relief valve 107a is opened, thereby reducing the pressure and providing protection. Of course, the first section of the opening of the fourth channel can also be blocked by a block. Based on the first, second, and third embodiments of the combination valve, it is foreseeable that the combination valve can have other embodiments, which are not listed one by one here.

[0082] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A combination valve, comprising a first valve component, a second valve component, and a valve block, wherein the first valve component and the second valve component are assembled with the valve block, characterized in that: The valve block includes a first valve block cavity, a second valve block cavity, a first bypass channel, and a second bypass channel, at least a portion of the first valve component is located in the first valve block cavity, and at least a portion of the second valve component is located in the second valve block cavity. The valve block also includes a first channel, a second channel, a third channel, and a fourth channel, the fourth channel includes a first section and a second section, the second channel is in communication with the first valve block cavity or the first bypass channel via the first section, the first channel is in communication with the first valve block cavity or the first bypass channel, the second channel is in communication with the second valve block cavity or the second bypass channel via the second section, and the third channel is in communication with the second valve block cavity or the second bypass channel; The valve block further includes a first valve block lower chamber, the first valve component further includes a first one-way valve assembly, the first one-way valve assembly is located in the first valve block lower chamber, the first one-way valve assembly includes a first one-way valve spool, the valve block further includes a second valve block valve port, the second valve block valve port is located on the top wall of the first valve block lower chamber, the first one-way valve spool is capable of abutting against the second valve block valve port to seal the second valve block valve port; At least one of the first valve member and the second valve member is capable of regulating flow rate.

2. The combination valve according to claim 1, characterized in that: The first valve component includes a first stator assembly, a first rotor assembly, a first valve seat and a first valve core, the first valve seat includes a first valve seat upper cavity, a first lateral channel and a first valve seat valve port, the first valve core can cooperate with the first valve seat valve port to adjust the size of the flow area of ​​the throttling channel formed between the first valve core and the first valve seat valve port, the first valve seat and the first valve core are located in the first valve block cavity; the combination valve also includes a first annular channel, the first annular channel includes a space between a part of the inner circumferential wall of the first valve block cavity surrounding the first valve block cavity and a part of the outer circumferential wall of the first valve seat, the first valve seat upper cavity is connected to the first annular channel through the first lateral channel; the first annular channel is connected to the first channel through the first bypass channel; when the first valve core leaves the first valve seat valve port, the second channel is connected to the first channel through the first section, the first valve seat valve port, the first valve seat upper cavity, the first annular channel, and the first bypass channel.

3. The combination valve according to claim 1, characterized in that: The first valve component includes a first stator assembly, a first rotor, a first valve seat and a first valve core, the first valve seat includes a first valve seat upper cavity, a first lateral channel and a first valve seat valve port, the first valve core can cooperate with the first valve seat valve port to adjust the size of the flow area of ​​the throttling channel formed between the first valve core and the first valve seat valve port, the first valve seat and the first valve core are located in the first valve block cavity; the combination valve also includes a first annular channel, the first annular channel includes a space between a part of the inner circumferential wall of the first valve block cavity surrounding the first valve block cavity and a part of the outer circumferential wall of the first valve seat, the first valve seat upper cavity is connected to the first annular channel through the first lateral channel; the first annular channel is connected to the first section through the first bypass channel; when the first valve core leaves the first valve seat valve port, the second channel is connected to the first channel through the first section, the first bypass channel, the first annular channel, the first bypass channel, the first valve seat upper cavity, and the first valve seat valve port.

4. The combination valve according to claim 2 or 3, characterized in that: The first valve component also includes a first piston assembly, which is located in the first valve block cavity. The first piston assembly has a first piston hole. When the first valve core leaves the first valve seat valve port, the first valve seat upper cavity is connected to the first section or the first channel through the first valve seat valve port and the first piston hole; the first valve block lower cavity is connected to the first section or the first channel. The valve block also includes a first valve block valve port, which is located on the bottom wall of the first valve block cavity. The first piston assembly can abut against the first valve block valve port to seal the first valve block valve port. When the first piston assembly leaves the first valve block valve port, the second channel is connected to the first channel through the first section, the first valve block valve port, and the first valve block lower cavity, or the first channel is connected to the second channel through the first valve block valve port, the first valve block lower cavity, and the first section.

5. The combination valve according to claim 4, characterized in that: When the first piston assembly leaves the first valve block valve port and the first one-way valve assembly leaves the second valve block valve port, the second channel is connected to the first channel through the first section, the first valve block valve port, the second valve block valve port, and the first valve block lower cavity, or the first channel is connected to the second channel through the first valve block valve port, the second valve block valve port, the first valve block lower cavity, and the first section; when the first valve core leaves the first valve block valve port, the first piston assembly abuts against the first valve block valve port, and the first one-way valve core abuts against the second valve block valve port, the second channel is connected to the first channel through the first section, the first piston hole, the first valve seat valve port, the first valve seat upper cavity, the first annular channel, and the first bypass channel, or the second channel is connected to the first channel through the first section, the first bypass channel, the first annular channel, the first bypass channel, the first valve seat upper cavity, the first valve seat valve port, and the first piston hole.

6. The combination valve according to claim 5, characterized in that: The second valve component includes a second stator assembly, a second rotor assembly, a second valve seat and a second valve core, the second valve seat includes a second valve seat upper cavity, a second lateral channel and a second valve seat valve port, the second valve core can cooperate with the second valve seat valve port to adjust the size of the flow area of ​​the throttling channel formed between the second valve core and the second valve seat valve port, the second valve seat and the second valve core are located in the second valve block cavity; the combination valve also includes a second annular channel, the second annular channel includes a space between a part of the inner circumferential wall of the second valve block cavity surrounding the second valve block cavity and a part of the outer circumferential wall of the second valve seat, the second valve seat upper cavity is connected to the second annular channel through the second lateral channel; the second annular channel is connected to the third channel through the second bypass channel; when the second valve core leaves the second valve seat valve port, the second channel is connected to the third channel through the second section, the second valve seat valve port, the second valve seat upper cavity, the second annular channel, and the second bypass channel.

7. The combination valve according to claim 5, characterized in that: The second valve component includes a second stator assembly, a second rotor, a second valve seat and a second valve core, the second valve seat includes a second valve seat upper cavity, a second lateral channel and a second valve seat valve port, the second valve core can cooperate with the second valve seat valve port to adjust the size of the flow area of ​​the throttling channel formed between the second valve core and the second valve seat valve port, the second valve seat and the second valve core are located in the second valve block cavity; the combination valve also includes a second annular channel, the second annular channel includes a space between a portion of the second valve block cavity inner circumferential wall surrounding the second valve block cavity and a portion of the outer circumferential wall of the second valve seat, the second valve seat upper cavity is connected to the second annular channel through the second lateral channel; the second annular channel is connected to the second section through the second bypass channel; when the second valve core leaves the second valve seat valve port, the second channel is connected to the third channel through the second section, the second bypass channel, the second annular channel, the second bypass channel, the second valve seat upper cavity and the second valve seat valve port.

8. The combination valve according to claim 6 or 7, characterized in that: The second valve component also includes a second piston assembly, which is located in the second valve block cavity. The second piston assembly has a second piston hole. When the second valve core leaves the second valve seat valve port, the second valve seat upper cavity is connected to the second section or the second channel through the second valve seat valve port and the second piston hole; the valve block also includes a second valve block lower cavity, which is connected to the second section or the second channel. The valve block also includes a third valve block valve port, which is located on the bottom wall of the second valve block cavity. The second piston assembly can abut against the third valve block valve port to seal the third valve block valve port. When the second piston assembly leaves the third valve block valve port, the second channel is connected to the third channel through the second section, the third valve block valve port, and the second valve block lower cavity, or the third channel is connected to the second channel through the third valve block valve port, the second valve block lower cavity, and the second section.

9. The combination valve according to claim 8, characterized in that: The second valve component also includes a second one-way valve assembly, the second one-way valve assembly is located in the lower chamber of the second valve block, the second one-way valve assembly includes a second one-way valve spool, the valve block also includes a fourth valve block valve port, the fourth valve block valve port is located on the top wall of the second valve block lower chamber, the second one-way valve spool can abut against the fourth valve block valve port to seal the fourth valve block valve port, when the second piston assembly leaves the third valve block valve port and the second one-way valve assembly leaves the fourth valve block valve port, the second channel is connected to the third channel through the second section, the third valve block valve port, the fourth valve block valve port and the second valve block lower chamber, or the third channel is connected to the third valve block valve port, the fourth valve block valve port and the second valve block lower chamber. The fourth valve block valve port, the second valve block lower chamber, and the second section are connected to the second channel; when the second valve core leaves the second valve seat valve port, the second piston assembly abuts against the third valve block valve port, and the second one-way valve core abuts against the fourth valve block valve port, the second channel is connected to the third channel through the second section, the second piston hole, the second valve seat valve port, the second valve seat upper chamber, the second annular channel, and the second bypass channel, or the second channel is connected to the third channel through the second section, the second bypass channel, the second annular channel, the second bypass channel, the second valve seat upper chamber, the second valve seat valve port, and the second piston hole.

10. The combination valve according to claim 9, characterized in that: The combination valve includes a first working mode, a second working mode, and a third working mode: In the first working mode, the second channel serves as a working medium inlet channel, and the first channel or the third channel serves as a working medium outlet channel; In the second working mode, the first channel serves as the working medium inlet channel and the second channel serves as the working medium outlet channel; or the second channel serves as the working medium inlet channel and the third channel serves as the working medium outlet channel; In the third working mode, the first channel serves as a working medium inlet channel, and the second channel serves as a working medium outlet channel; or the third channel serves as a working medium inlet channel, and the second channel serves as a working medium outlet channel.

11. The combination valve according to claim 9, characterized in that: The first valve component further includes a first connector, to which the wiring terminals led out of the first stator assembly extend; the second valve component further includes a second connector, to which the wiring terminals led out of the second stator assembly extend; or the first valve component further includes a first electrical control box, which has a first electrical control board, to which the wiring terminals led out of the first stator assembly are connected, and which has a first connector; the second valve component further includes a second electrical control box, which has a second electrical control board, to which the wiring terminals led out of the second stator assembly are connected, and which has a second connector.

12. The combination valve according to claim 11, characterized in that: The first section opening of the fourth channel is sealed by a pressure relief valve.

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