Flow regulating valve

Abstract

The utility model belongs to the technical field of valves, and particularly discloses a flow regulating valve which comprises a valve body, a valve element and a regulating part, the valve body is provided with a first channel, a second channel, a third channel and a sliding channel, a throttling opening is formed in the third channel, the first channel is communicated with the second channel through the throttling opening, and the sliding channel is communicated with the third channel. A guide groove is formed in the inner wall of the sliding channel; a guide block is arranged on the periphery of the valve element, the first end of the valve element penetrates through the sliding channel and is arranged in the third channel, the guide block is located in the guide groove, the surface of the guide block is attached to the groove wall of the guide groove, and the first end of the valve element is used for adjusting the opening degree of the throttling opening; the adjusting part comprises a fixing part arranged on the valve body and a transmission part rotationally connected with the fixing part, the transmission part is in threaded connection with the second end of the valve element, the transmission part and the valve element are in transmission in a threaded connection mode, rotation is converted into linear sliding, the large transmission ratio is achieved, and then the high flow adjusting precision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a flow regulating valve. Background Art

[0002] Regulating valves, also known as control valves, use power to change fluid flow by receiving control signals from a regulating control unit. With the advancement of water purification equipment, flow regulation is now required in many scenarios, such as wastewater discharge from reverse osmosis water purifiers, temperature control in instant hot water dispensers, and flow rate adjustment in under-sink water heaters.

[0003] Most of the flow control valves today generally regulate the flow of the controlled medium by controlling the gap between the valve core and the throttle port. Every time the valve core rises or falls a unit distance, the flow increases or decreases accordingly. However, the existing flow control valves have poor control over the accuracy of valve core movement, resulting in low flow regulation accuracy and poor compatibility with household water purification equipment. Utility Model Content

[0004] One of the technical problems solved by the present invention is to provide a flow control valve, which can effectively solve the problem of low flow control accuracy.

[0005] The above technical problems are solved by the following technical solutions:

[0006] A flow regulating valve, comprising:

[0007] The valve body is provided with a first channel, a second channel, a third channel and a sliding channel, the third channel is provided with a throttle port, the first channel and the second channel are connected through the throttle port, the sliding channel is connected to the third channel, and the inner wall of the sliding channel is provided with a guide groove extending in a first direction;

[0008] A valve core, wherein a guide block is provided on the periphery of the valve core, a first end of the valve core passes through the sliding channel and is placed in the third channel, the guide block is located in the guide groove, and a surface of the guide block is in contact with a groove wall of the guide groove so that the valve core slides along a first direction and passes through the sliding channel, and the first end of the valve core is used to adjust the opening of the throttle port;

[0009] The regulating member comprises a fixing portion arranged on the valve body and a transmission portion rotatably connected to the fixing portion, wherein the transmission portion is threadedly connected to the second end of the valve core.

[0010] Compared with the background technology, the flow control valve of the present invention has the following beneficial effects:

[0011] Under the guidance of the guide groove and the guide block, the transmission part is rotated relative to the fixed part around the first direction, which can drive the valve core to slide along the first direction relative to the sliding channel, thereby realizing the adjustment of the opening of the throttle port by the first end of the valve core, which is convenient for operation. The transmission part and the valve core are transmitted by a threaded connection, converting the rotation into linear sliding, with a large transmission ratio, and controlling the opening of the throttle port according to the rotation angle or number of turns of the transmission part, thereby making the flow control valve have a higher flow control accuracy.

[0012] In one embodiment, the valve body comprises:

[0013] A base, provided with the first channel, the second channel and the third channel;

[0014] The upper seat is arranged on the base, and the upper seat is provided with the sliding channel.

[0015] In one embodiment, the base includes a first sealing surface provided at an outer port of the third channel, the upper seat includes a second sealing surface in contact with the first sealing surface, and a first sealing ring is provided between the first sealing surface and the second sealing surface.

[0016] In one embodiment, a protrusion is provided on the second sealing surface, the sliding channel passes through the protrusion, and the protrusion extends into the third channel and is threadedly connected to the inner wall of the third channel.

[0017] In one embodiment, a second sealing ring is provided between the sliding channel and the valve core.

[0018] In one embodiment, an annular groove is provided at one end of the sliding channel facing away from the base, and the second sealing ring is provided in the annular groove;

[0019] A sealing cover is provided at one end of the sliding channel facing away from the base, and the sealing cover abuts against the second sealing ring.

[0020] In one embodiment, an inner chamfered surface is provided at one end of the sliding channel connected to the third channel, a sealing ring portion is provided at the periphery of the first end of the valve core, and an inclined surface is provided on the side of the sealing ring portion facing the inner chamfered surface, and the inclined surface is arranged parallel to the inner chamfered surface.

[0021] In one embodiment, the guide block includes two first guide surfaces arranged opposite to each other along the circumference of the valve core, and the guide groove includes two second guide surfaces arranged in a one-to-one correspondence with the first guide surfaces, and the first guide surfaces are in contact with the corresponding second guide surfaces.

[0022] In one embodiment, the third channel is stepped, including a large end and a small end, a step surface is formed between the large end and the small end, the step surface is provided with a through hole connected to the first channel, the throttle port is formed at the connection between the large end and the small end, the second channel is connected to the small end, and the first end of the valve core passes through the large end.

[0023] In one embodiment, the adjusting member is configured as a screw motor, the fixing portion is configured as a housing of the screw motor, and the transmission portion is configured as a screw of the screw motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural cross-sectional view of the flow control valve provided by the utility model;

[0025] Figure 2 A schematic structural diagram of the flow control valve provided by the utility model;

[0026] Figure 3 A structural sectional view of the base provided by the utility model;

[0027] Figure 4 A structural sectional view of the upper seat provided by the utility model;

[0028] Figure 5 A schematic diagram of the structure of the valve core provided by the utility model;

[0029] Figure 6 A schematic diagram of the structure of the upper seat provided by the utility model;

[0030] Figure 7 A schematic structural diagram of the sealing cover provided by the present invention;

[0031] Figure 8 This is a structural schematic diagram of the adjusting member provided by the utility model.

[0032] Description of labels:

[0033] 100, valve body; 101, first channel; 102, second channel; 103, third channel; 1031, throttle; 1032, large end; 1033, small end; 1034, stepped surface; 1035, through hole; 104, undercut; 105, sealing groove; 110, base; 111, first sealing surface; 120, upper seat; 121, sliding channel; 1211, guide groove; 1212, inner chamfered surface; 1213, annular groove; 122, second sealing surface; 1221, protrusion; 123, recessed groove; 124, support column;

[0034] 200, valve core; 210, guide block; 211, first guide surface; 220, sealing ring portion; 221, inclined surface;

[0035] 300, adjusting member; 310, fixing portion; 311, second ear portion; 3111, second fixing hole; 320, transmission portion;

[0036] 400, pipe joint; 410, pipe sleeve; 420, pipe clamp;

[0037] 500, water sealing ring;

[0038] 600, first sealing ring;

[0039] 700, second sealing ring;

[0040] 800, sealing cover; 801, through hole; 810, first ear; 811, first fixing hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] Reference Figure 1 and Figure 2 As shown, this embodiment provides a flow control valve, including a valve body 100 , a valve core 200 and a regulating member 300 .

[0046] Specifically, the valve body 100 is provided with a first channel 101, a second channel 102, a third channel 103 and a sliding channel 121, a throttle port 1031 is provided in the third channel 103, the first channel 101 and the second channel 102 are connected through the throttle port 1031, the sliding channel 121 is connected to the third channel 103, and a guide groove 1211 extending in a first direction is provided on the inner wall of the sliding channel 121; a guide block 210 is provided on the periphery of the valve core 200, and the sliding channel 121 is passed through the first end of the valve core 200. The valve body 100 is disposed within the third channel 103. The guide block 210 is positioned within the guide groove 1211, and the surface of the guide block 210 is in contact with the wall of the guide groove 1211, allowing the valve core 200 to slide along the first direction through the sliding channel 121. The first end of the valve core 200 is used to adjust the opening of the throttle 1031. The regulating member 300 includes a fixed portion 310 provided on the valve body 100 and a transmission portion 320 rotatably connected to the fixed portion 310 about the first direction. The transmission portion 320 is threadedly connected to the second end of the valve core 200. It can be understood that the first channel 101 and the second channel 102 are both gas or liquid delivery channels. The direction a in the figure is the first direction, which can be the height direction of the flow control valve.

[0047] For example, under the guidance of the guide groove 1211 and the guide block 210, the transmission part 320 is rotated about the first direction relative to the fixed part 310, which can drive the valve core 200 to slide along the first direction relative to the sliding channel 121, thereby realizing the opening adjustment of the throttle port 1031 by the first end of the valve core 200, which is convenient for operation. The transmission part 320 and the valve core 200 are transmitted by a threaded connection, converting the rotation into linear sliding, and having a large transmission ratio. It can be understood that when the transmission part 320 is rotated one circle, the distance moved by the valve core 200 is very small. The opening of the throttle port 1031 is controlled according to the rotation angle or number of circles of the transmission part 320, so that the flow control valve has a higher flow control accuracy.

[0048] For example, the flow regulating valve with different flow rates can be customized by replacing the transmission part 320 and the valve core 200 with different thread pitches.

[0049] In some embodiments, the adjusting member 300 can be configured as a screw motor, the housing of the screw motor is the fixed portion 310, and the screw of the screw motor is the transmission portion 320. The valve core 200 can be automatically driven to slide by the screw motor, with high transmission accuracy and convenient intelligent control. Among them, the second end of the valve core 200 is provided with a threaded hole connected to the screw. Among them, the screw motor can be a stepping motor. In other embodiments, a handle can be provided on the transmission portion 320, and the transmission portion 320 can be manually rotated by the handle. Of course, the transmission portion 320 can also be driven by other structures, which is not limited in this application.

[0050] In this embodiment, referring to Figures 1 to 3 As shown, the third channel 103 is stepped, including a large end 1032 and a small end 1033. A stepped surface 1034 is formed between the large end 1032 and the small end 1033. The stepped surface 1034 is provided with a through hole 1035 communicating with the first channel 101. A throttle opening 1031 is formed at the connection between the large end 1032 and the small end 1033. The second channel 102 is connected to the small end 1033, and the first end of the valve core 200 passes through the large end 1032. In this embodiment, the third channel 103 is configured as a step so that the throttle opening 1031 is opened along the first direction, which facilitates the formation of the throttle opening 1031. The valve core 200 slides along the first direction and can block the throttle opening 1031 along the first direction, effectively ensuring the sealing performance of the valve core 200 in blocking the throttle opening 1031.

[0051] For example, the first end of the valve core 200 is tapered, and the corresponding throttle opening 1031 is tapered, which can increase the contact area between the valve core 200 and the throttle opening 1031, effectively enhancing the sealing performance of the valve core 200 on the throttle opening 1031. The cone angle of the throttle opening 1031 is 60°-120°, such as 75°, 90°, or 105°, so that the valve core 200 has good sealing performance when sealing the throttle opening 1031, and effectively ensures flow regulation accuracy.

[0052] Exemplarily, the first channel 101 and the second channel 102 extend perpendicularly to the first direction to facilitate molding of the valve body 100. Optionally, the first channel 101 and the second channel 102 both extend along the second direction, and the third channel 103 is located between the first channel 101 and the second channel 102 along the second direction. Direction b in the figure represents the second direction, which can be the longitudinal direction of the valve body 100. Of course, the extension direction of the first channel 101 and the extension direction of the second channel 102 can also form an acute or obtuse angle.

[0053] In a feasible embodiment, pipe joints 400 are provided at the outer ends of the first channel 101 and the second channel 102 to facilitate connection with pipe fittings.

[0054] Specifically, the pipe connector 400 includes a pipe sleeve 410 and a pipe clamp 420 disposed within the pipe sleeve 410. The pipe connector 400 clamps the pipe fitting via the pipe clamp 420. Optionally, the valve body 100 is provided with an undercut 104, and the pipe sleeve 410 is sleeved on the valve body 100 and clamped with the undercut 104. Of course, the pipe sleeve 410 can be connected to the valve body 100 via a threaded connection or other means, which is not limited in this application.

[0055] More specifically, at least one water sealing ring 500 , for example, two water sealing rings 500 , are disposed in the outer ports of the first channel 101 and the second channel 102 to prevent water leakage.

[0056] Exemplarily, the material of the water sealing ring 500 includes but is not limited to ethylene propylene diene monomer (EPDM) material.

[0057] In this embodiment, referring to Figures 1 to 5 As shown, the valve body 100 includes a base 110 and an upper seat 120. The base 110 is provided with a first channel 101, a second channel 102, and a third channel 103. The upper seat 120 is provided on the base 110 and is provided with a sliding channel 121. In this embodiment, the valve body 100 is separated into the base 110 and the upper seat 120 to facilitate the molding and manufacturing of the valve body 100 and the assembly between the valve body 100 and the valve core 200.

[0058] For example, the base 110 and the upper seat 120 can be injection molded from polypropylene (PP). Of course, they can also be molded by metal casting or other methods, which are not limited in this application.

[0059] In some embodiments, the guide block 210 includes two first guide surfaces 211 disposed opposite each other along the circumference of the valve core 200. The guide groove 1211 includes two second guide surfaces corresponding to the first guide surfaces 211. The first guide surfaces 211 mate with the corresponding second guide surfaces to prevent the valve core 200 from rotating and ensure that the valve core 200 slides stably in the first direction. The cross-sectional shape of the guide block 210 may be rectangular.

[0060] In other embodiments, the cross-sectional shape of the guide block 210 can be semicircular, and the cross-sectional shape of the corresponding guide groove 1211 can also be set to be semicircular to ensure that the guide block 210 fits well with the groove wall of the guide groove 1211. Of course, the cross-sectional shape of the guide block 210 can also be other shapes, and this application does not limit it.

[0061] Specifically, at least one guide block 210 is provided on the valve core 200, and the guide grooves 1211 correspond one to one with the guide blocks 210. Optionally, multiple guide blocks 210 may be provided at intervals along the circumference of the valve core 200 to distribute the force and reduce wear between the guide blocks 210 and the guide grooves 1211. Exemplarily, two guide blocks 210 are provided at equal intervals along the circumference of the valve core 200.

[0062] Specifically, the base 110 includes a first sealing surface 111 provided at the outer port of the third channel 103, and the upper seat 120 includes a second sealing surface 122 that is in contact with the first sealing surface 111. A first sealing ring 600 is provided between the first sealing surface 111 and the second sealing surface 122. The base 110 and the upper seat 120 are sealed by the first sealing ring 600 to effectively prevent water leakage between the first sealing surface 111 and the second sealing surface 122.

[0063] Exemplarily, the material of the first sealing ring 600 includes but is not limited to ethylene propylene diene monomer (EPDM) material.

[0064] Illustratively, a sealing groove 105 for accommodating the first sealing ring 600 is provided on at least one of the first sealing surface 111 and the second sealing surface 122 , so as to facilitate the positioning and assembly of the first sealing ring 600 and enhance the sealing effect of the first sealing ring 600 .

[0065] In one feasible embodiment, a protrusion 1221 is provided on the second sealing surface 122, and the sliding channel 121 passes through the protrusion 1221. The protrusion 1221 extends into the third channel 103 and is threadedly connected to the inner wall of the third channel 103, facilitating the assembly between the base 110 and the upper seat 120. The provision of the protrusion 1221 can extend the size of the sliding channel 121, making the sliding of the valve core 200 stable and reliable, and increasing the sliding range of the valve core 200, so that the throttle 1031 has a larger opening adjustment range. Of course, the base 110 and the upper seat 120 can also be connected by multiple bolts, hot melt or gluing, etc., which is not limited in this application.

[0066] It is worth mentioning that an inner chamfered surface 1212 is provided at one end of the sliding channel 121 that communicates with the third channel 103, and a sealing ring portion 220 is provided on the periphery of the first end of the valve core 200. The sealing ring portion 220 is provided with an inclined surface 221 on the side facing the inner chamfered surface 1212. The inclined surface 221 is arranged parallel to the inner chamfered surface 1212. When the throttle 1031 is opened to the maximum, that is, the inclined surface 221 and the inner chamfered surface 1212 are in contact, a seal can be achieved, effectively preventing water leakage between the sliding channel 121 and the valve core 200. For example, the periphery of the sealing ring portion 220 can be in contact with the inner wall of the third channel 103 to achieve a seal, further preventing water leakage between the sliding channel 121 and the valve core 200 and between the first sealing surface 111 and the second sealing surface 122.

[0067] Exemplarily, the inclination angle of the inner chamfered surface 1212 is 30°-60°, for example, 45°, so as to achieve a good sealing effect between the first sealing surface 111 and the second sealing surface 122 .

[0068] In this embodiment, referring to Figure 1 、 Figure 4 、 Figure 6 and Figure 7 As shown, a second sealing ring 700 is provided between the sliding channel 121 and the valve core 200 to prevent water leakage between the sliding channel 121 and the valve core 200 .

[0069] Exemplarily, the material of the second sealing ring 700 includes but is not limited to ethylene propylene diene monomer (EPDM) material.

[0070] Specifically, an annular groove 1213 is defined at one end of the sliding channel 121 facing away from the base 110. A second sealing ring 700 is located within the annular groove 1213. A sealing cap 800 is defined at the other end of the sliding channel 121 facing away from the base 110. The sealing cap 800 abuts against the second sealing ring 700, that is, the sealing cap 800 compresses the second sealing ring 700 to ensure a good seal between the second sealing ring 700, the sliding channel 121, and the valve core 200. A through hole 801 is defined in the sealing cap 800, through which the valve core 200 is inserted.

[0071] Exemplarily, the sealing cover 800 may be made of metal, such as 304 stainless steel, which has sufficient strength to effectively prevent the sealing cover 800 from deforming and affecting the sealing effect of the second sealing ring 700 .

[0072] Exemplarily, at least one second sealing ring 700 is provided, for example, two or three are provided side by side along the first direction.

[0073] Exemplarily, the flow regulating valve also includes a plurality of first screw connectors (not shown), and a plurality of first fixing holes 811 are provided on the sealing cover 800. The first screw connectors are respectively provided through the first fixing holes 811 and are threadedly connected to the upper seat 120 to realize the connection between the sealing cover 800 and the upper seat 120, which is convenient and reliable.

[0074] Illustratively, the sealing cover 800 may be provided with a plurality of first ear portions 810 corresponding one-to-one to the first fixing holes 811 , and the first fixing holes 811 are provided on the first ear portions 810 .

[0075] For example, a recessed groove 123 may be provided at one end of the upper seat 120 facing away from the base 110 , and the sealing cover 800 is disposed in the recessed groove 123 , which has a compact structure and facilitates the positioning and assembly of the sealing cover 800 .

[0076] In this embodiment, referring to Figure 1 、 Figure 6 and Figure 8 As shown, at least two support columns 124 are spaced apart on the edge of the upper seat 120 facing away from the base 110. The fixing portion 310 of the adjusting member 300 is provided with a second ear portion 311 corresponding one-to-one with the support columns 124. The second ear portion 311 is provided with a second fixing hole 3111. The flow control valve also includes a second screw member (not shown) corresponding one-to-one with the second ear portion 311. The second screw member passes through the second fixing hole 3111 and is threadedly connected to the support column 124. In this embodiment, the support columns 124 are provided to allow the valve core 200 to have an appropriate sliding range and facilitate assembly of the adjusting member 300.

[0077] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A flow control valve, characterized in that: include: A valve body (100) is provided with a first channel (101), a second channel (102), a third channel (103) and a sliding channel (121); a throttle port (1031) is provided in the third channel (103); the first channel (101) and the second channel (102) are communicated through the throttle port (1031); the sliding channel (121) is arranged to communicate with the third channel (103); and a guide groove (1211) extending along a first direction is provided on an inner wall of the sliding channel (121); A valve core (200), wherein a guide block (210) is provided on the periphery of the valve core (200), a first end of the valve core (200) passes through the sliding channel (121) and is placed in the third channel (103), the guide block (210) is located in the guide groove (1211), and the surface of the guide block (210) is in contact with the groove wall of the guide groove (1211) so that the valve core (200) slides along a first direction and passes through the sliding channel (121), and the first end of the valve core (200) is used to adjust the opening of the throttle port (1031); The regulating member (300) comprises a fixing portion (310) provided on the valve body (100) and a transmission portion (320) connected to the fixing portion (310) for rotation around a first direction, wherein the transmission portion (320) is threadedly connected to the second end of the valve core (200).

2. The flow control valve according to claim 1, characterized in that: The valve body (100) comprises: A base (110) is provided with the first channel (101), the second channel (102) and the third channel (103); An upper seat (120) is provided on the base (110), and the upper seat (120) is provided with the sliding channel (121).

3. The flow control valve according to claim 2, characterized in that: The base (110) includes a first sealing surface (111) provided at an outer port of the third channel (103); the upper seat (120) includes a second sealing surface (122) in contact with the first sealing surface (111); and a first sealing ring (600) is provided between the first sealing surface (111) and the second sealing surface (122).

4. The flow control valve according to claim 3, characterized in that: A protrusion (1221) is provided on the second sealing surface (122), the sliding channel (121) is provided through the protrusion (1221), and the protrusion (1221) extends into the third channel (103) and is threadedly connected to the inner wall of the third channel (103).

5. The flow control valve according to claim 2, characterized in that: A second sealing ring (700) is provided between the sliding channel (121) and the valve core (200).

6. The flow control valve according to claim 5, characterized in that: An annular groove (1213) is provided at one end of the sliding channel (121) facing away from the base (110), and the second sealing ring (700) is provided in the annular groove (1213); A sealing cover (800) is provided at one end of the sliding channel (121) facing away from the base (110), and the sealing cover (800) abuts against the second sealing ring (700).

7. The flow control valve according to claim 1, characterized in that: An end of the sliding channel (121) communicating with the third channel (103) is provided with an inner chamfered surface (1212); a first end periphery of the valve core (200) is provided with a sealing ring portion (220); a side of the sealing ring portion (220) facing the inner chamfered surface (1212) is provided with an inclined surface (221); and the inclined surface (221) is arranged parallel to the inner chamfered surface (1212).

8. The flow control valve according to claim 1, characterized in that: The guide block (210) includes two first guide surfaces (211) arranged opposite to each other along the circumference of the valve core (200), and the guide groove (1211) includes two second guide surfaces arranged in a one-to-one correspondence with the first guide surfaces (211), and the first guide surface (211) is in contact with the corresponding second guide surface.

9. The flow control valve according to any one of claims 1 to 8, characterized in that: The third channel (103) is stepped, comprising a large end (1032) and a small end (1033); a stepped surface (1034) is formed between the large end (1032) and the small end (1033); the stepped surface (1034) is provided with a through hole (1035) communicating with the first channel (101); the throttle port (1031) is formed at the connection between the large end (1032) and the small end (1033); the second channel (102) is arranged to communicate with the small end (1033); and the first end of the valve core (200) passes through the large end (1032).

10. The flow control valve according to any one of claims 1 to 8, characterized in that: The adjusting member (300) is configured as a screw motor, the fixing portion (310) is configured as a housing of the screw motor, and the transmission portion (320) is configured as a screw of the screw motor.

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