throttle valve

Abstract

The application provides a throttle valve, which comprises a shell with a flow passage, a valve body assembly arranged in the flow passage, the valve body assembly being provided with a valve seat, a valve core assembly and a one-way valve, the valve seat being arranged in the flow passage, the valve seat being provided with a first flow port, a second flow port, a valve cavity and a valve port, the first flow port being located at a first end of the valve seat, the second flow port and the valve port being located at a second end of the valve seat, the first flow port, the second flow port and the valve port being communicated with the valve cavity, the valve core assembly being movably arranged in the valve cavity and penetrating through the valve port, and the one-way valve being movably arranged in the second flow port. Through the technical scheme, the problems of complex structure and high cost in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of throttle valves, in particular to a kind of throttle valves. BACKGROUND

[0002] Currently, the flow direction of refrigerant is different in refrigeration condition and heating condition in air conditioning system, so two sets of throttling pipelines are often needed to set up to throttle when throttling pipeline, and to prevent backflow, one-way valve is also needed to set up in throttling pipeline, so that system structure is complex and cost is high. SUMMARY

[0003] The present application provides a kind of throttle valve to solve the problems of complex structure and high cost in prior art.

[0004] The present application provides a kind of throttle valve, the throttle valve includes: shell, with flow passage;Valve body assembly is arranged in flow passage, valve body assembly has valve seat, valve core assembly and one-way valve core, valve seat is arranged in flow passage, valve seat has first flow port, second flow port, valve cavity and valve port, first flow port is located at the first end of valve seat, second flow port and valve port are located at the second end of valve seat, first flow port, second flow port and valve port are all communicated with valve cavity, valve core assembly is movably arranged in valve cavity, and valve core assembly is arranged at valve port, one-way valve core is movably arranged in second flow port.

[0005] Further, a plurality of second flow ports are arranged on the valve seat, and one one-way valve core is arranged in each second flow port.

[0006] Further, the end of one-way valve core is a plugging portion, and a flow channel is arranged on the side wall of one-way valve core, which extends along the axial direction of one-way valve core.

[0007] Further, a plurality of flow channels are arranged on one-way valve core, and the plurality of flow channels are uniformly and spacedly arranged along the circumferential direction of one-way valve core.

[0008] Further, a limiting structure is arranged between the second flow port and the one-way valve core, and the limiting structure is used to limit the position of one-way valve core in the second flow port.

[0009] Further, the second flow port includes a first hole section, a transition section and a second hole section which are sequentially communicated with each other, the first hole section is arranged close to the first end of the valve seat, the hole diameter of the first hole section is smaller than the hole diameter of the second hole section, and the one-way valve core is arranged in the second hole section and used to block the first hole section.

[0010] Further, a fixing structure is arranged between the valve seat and the shell.

[0011] Further, the fixing structure comprises a limiting groove and a limiting protrusion, the limiting groove is arranged on the outer wall of the valve seat, the limiting protrusion is arranged on the inner wall of the shell, and the limiting protrusion is matched and clamped with the limiting groove to fix the valve seat in the shell.

[0012] Further, the valve core assembly comprises: a head fixedly arranged at the first end of the valve seat; a valve needle movably arranged in the valve cavity, one end of the valve needle penetrating the valve port; and a spring, one end of the spring being connected with the head and the other end of the spring being connected with the valve needle.

[0013] Further, the valve body assembly is two, and the second ends of the valve seats of the two valve body assemblies are oppositely arranged in the flow passage of the shell.

[0014] By applying the technical scheme of the present application, the throttle valve comprises a shell and a valve body assembly, the valve body assembly comprises a valve seat, a valve core assembly and a one-way valve core, the valve seat is provided with a first flow port, a second flow port, a valve cavity and a valve port, and the one-way valve core is arranged at the second flow port, the throttle and the one-way functions are integrated in one valve body structure, the device structure is simplified, the number of parts is reduced, and the device is convenient to disassemble and assemble. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application, and do not limit the present application in any manner. In the drawings:

[0016] Figure 1 A structure schematic view of a throttle valve provided by an embodiment of the present application is shown;

[0017] Figure 2 A structure schematic view of a throttle valve provided by another embodiment of the present application is shown;

[0018] Figure 3 A structure schematic view of a valve seat is shown; Figure 2

[0019] A structure schematic view of a one-way valve core provided by an embodiment of the present application is shown; Figure 4

[0020] A structure schematic view of a valve body assembly is shown. Figure 5 Figure 2

[0021] In the above drawings, the following reference signs are used:

[0022] 10, shell; 20, valve body assembly; 21, valve seat; 22, valve core assembly; 221, head; 222, valve needle; 223, spring;

[0023] ​​23, one-way valve core; 231, blocking part; 232, flow channel; 24, limiting structure;

[0024] 31, first flow port; 32, second flow port; 321, first hole section; 322, second hole section; 33, valve cavity; 34, valve port;

[0025] 41, limiting groove; 42, limiting convex part. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] As shown in Figure 1 , the throttling valve provided by the present application includes a housing 10 and a valve body assembly 20. The housing 10 has a flow passage, and the valve body assembly 20 is arranged in the flow passage. The valve body assembly 20 has a valve seat 21, a valve core assembly 22, and a one-way valve core 23. The valve seat 21 is arranged in the flow passage. The valve seat 21 has a first flow port 31, a second flow port 32, a valve cavity 33, and a valve port 34. The first flow port 31 is located at a first end of the valve seat 21, and the second flow port 32 and the valve port 34 are located at a second end of the valve seat 21. The first flow port 31, the second flow port 32, and the valve port 34 are all in communication with the valve cavity 33. The valve core assembly 22 is movably arranged in the valve cavity 33, and the valve core assembly 22 penetrates at the valve port 34 to control the flow or closing of the valve port 34. The one-way valve core 23 is movably arranged in the second flow port 32 to control the flow direction of fluid at the second flow port 32 through the one-way valve core.

[0028] Through the throttling valve provided by the present application, the throttling valve includes a housing 10 and a valve body assembly 20. The valve body assembly includes a valve seat, a valve core assembly, and a one-way valve core. The valve seat is provided with a first flow port, a second flow port, a valve cavity, and a valve port. The one-way valve core is arranged at the second flow port. The present application integrates the throttling and one-way functions in one valve body structure, which simplifies the device structure, reduces the number of parts, and facilitates disassembly and assembly.

[0029] Specifically, as shown in Figure 2 and Figure 3 , in the present embodiment, the throttling valve includes two valve body assemblies 20. The second ends of the valve seats 21 of the two valve body assemblies 20 are oppositely arranged in the flow passage of the housing 10.

[0030] In this way, when fluid flows from one valve body assembly 20 to another, the valve port 34 in the first valve body assembly 20 is closed, and the fluid flows through the second flow port 32 to the second valve body assembly 20. At this time, the valve port 34 in the second valve body assembly 20 is open, and the second flow port 32 of the second valve body assembly 20 is closed. The fluid enters the valve body assembly through the valve port 34 and flows out from the first flow port 31 of the second valve body assembly 20. This device simplifies the device structure while achieving bidirectional throttling.

[0031] The valve seat 21 is provided with multiple second flow ports 32, and each second flow port 32 contains a one-way valve core 23. The multiple second flow ports 32 increase the flow area. In this embodiment, the multiple second flow ports 32 are evenly distributed circumferentially at the second end of the valve seat 21.

[0032] like Figure 4 As shown, the end of the one-way valve core 23 is a sealing part 231, which blocks the second flow port 32. A flow groove 232 is provided on the side wall of the one-way valve core 23, which extends axially along the one-way valve core 23. By providing the flow groove 232 on the one-way valve core 23, the fluid can flow in the second flow port 32, thus reducing the space occupied by the one-way valve core 23 while ensuring unidirectional flow.

[0033] In this embodiment, the one-way valve core 23 is provided with a plurality of flow grooves 232, which are evenly spaced along the circumference of the one-way valve core 23. This arrangement allows the fluid to flow uniformly within the second flow port 32.

[0034] Specifically, the width of the flow channel 232 gradually increases in the direction away from the center of the one-way valve core 23 to ensure the flow area of ​​the flow channel 232. In this embodiment, a guide protrusion is formed on the sidewall between two adjacent flow channels 232. The guide protrusion gradually increases in the direction away from the center of the one-way valve core 23. The surface of the guide protrusion cooperates with the inner wall of the second flow port 32 to guide the one-way valve core 23.

[0035] The limiting structure 24 is arranged between the second flow port 32 and the one-way valve core 23, and is used to limit the position of the one-way valve core 23 in the second flow port 32. The limiting structure 24 can prevent the one-way valve core 23 from being pulled out of the second flow port 32. Specifically, the limiting structure 24 can be a riveting ring arranged annularly at one end of the second flow port 32 away from the first flow port 31. Alternatively, the limiting structure 24 can be a limiting protrusion arranged on the inner wall of the second flow port 32 or arranged at the end of the second flow port 32, as long as it can limit the one-way valve core 23.

[0036] As shown in Figure 3 and Figure 5 The second flow port 32 includes a first hole section 321, a transition section and a second hole section 322 that are sequentially communicated with each other. The first hole section 321 is arranged close to the first end of the valve seat 21, and the hole diameter of the first hole section 321 is smaller than that of the second hole section 322. The one-way valve core 23 is arranged in the second hole section 322 and is used to block the first hole section 321. The above structure can facilitate the blocking of the second flow port 32 by the one-way valve core 23. The transition section is arranged in a tapered shape, and the blocking part 231 of the one-way valve core 23 is also arranged in a tapered shape, so that the shape of the blocking part 231 is adapted to the shape of the transition section, thereby improving the blocking effect.

[0037] The fixing structure is arranged between the valve seat 21 and the shell 10, which can facilitate the fixation of the valve seat 21 in the shell 10.

[0038] In this embodiment, the fixing structure includes a limiting groove 41 arranged on the outer wall of the valve seat 21 and a limiting protrusion 42 arranged on the inner wall of the shell 10. The limiting protrusion 42 is engaged with the limiting groove 41 to fix the valve seat 21 in the shell 10. The limiting protrusion 42 can be formed by reducing the diameter, which facilitates the installation and fixation of the valve seat 21.

[0039] Specifically, the valve core assembly 22 includes a head 221, a valve needle 222 and a spring 223. The head 221 is fixedly arranged at the first end of the valve seat 21. The valve needle 222 is movably arranged in the valve cavity 33, and one end of the valve needle 222 penetrates the valve port 34. One end of the spring 223 is connected with the head 221, and the other end of the spring 223 is connected with the valve needle 222. The spring 223 cooperates with the valve needle 222 to make the fluid flow in a certain direction.

[0040] By the technical scheme provided in the application, the two valve body assemblies 20 can play the throttling role in the refrigeration working condition and the heating working condition respectively. When the fluid enters the flow passage from the upstream side of the shell 10, the fluid first enters the valve cavity 33 of the first valve body assembly 20, the one-way valve core 23 is opened due to the pressure difference, the valve needle 222 in the first valve body assembly 20 closes the valve port 34, the fluid flows out from the second flow passage 32 and flows to the second valve body assembly 20. Due to the pressure difference, the one-way valve core 23 in the second valve body assembly 20 closes the second flow passage 32, the fluid flows into the valve cavity 33 after the valve needle 222 is pushed open by the valve port 34, and flows to the downstream side of the shell 10. Conversely, when the fluid enters the flow passage from the downstream side, the one-way valve core 23 in the second valve body assembly 20 is opened, the valve needle 222 in the second valve body assembly 20 closes the valve port 34, the fluid flows out from the second flow passage 32 and flows to the first valve body assembly 20, the one-way valve core 23 in the first valve body assembly 20 closes the second flow passage 32, the fluid flows into the valve cavity 33 after the valve needle 222 is pushed open by the valve port 34, and flows to the upstream side.

[0041] Compared with the conventional throttle valve, the throttle valve provided in the application can realize the bidirectional throttling function, can be applied to the refrigeration and heating working conditions respectively, adopts the one-way valve core structure, has simple process, high reliability, high consistency of key parts for throttling, and is convenient for batch production.

[0042] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0043] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application, unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of providing an understanding of the example embodiments. Technical, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the discussion were incorporated herein and been part of the disclosure. In the examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not limiting. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is needed.

[0044] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0045] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0046] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the scope of protection of the application.

[0047] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A throttle valve, characterized in that, The throttle valve includes: The housing (10) has a flow channel; A valve body assembly (20) is disposed within the flow channel. The valve body assembly (20) has a valve seat (21), a valve core assembly (22), and a one-way valve core (23). The valve seat (21) is disposed within the flow channel and has a first flow port (31), a second flow port (32), a valve cavity (33), and a valve port (34). The first flow port (31) is located at the first end of the valve seat (21), and the second flow port (32) and the valve port (34) are located at the second end of the valve seat (21). The first flow port (31), the second flow port (32), and the valve port (34) are all connected to the valve cavity (33). The valve core assembly (22) is movably disposed within the valve cavity (33) and passes through the valve port (34). The one-way valve core (23) is movably disposed within the second flow port (32).

2. The throttle valve according to claim 1, characterized in that, The valve seat (21) is provided with a plurality of second flow ports (32), and each second flow port (32) is provided with a one-way valve core (23).

3. The throttle valve according to claim 1, characterized in that, The end of the one-way valve core (23) is a sealing part (231), and a flow groove (232) is provided on the side wall of the one-way valve core (23), which extends along the axial direction of the one-way valve core (23).

4. The throttle valve according to claim 3, characterized in that, The one-way valve core (23) is provided with a plurality of flow grooves (232), which are evenly spaced along the circumference of the one-way valve core (23).

5. The throttle valve according to claim 1, characterized in that, A limiting structure (24) is provided between the second flow port (32) and the one-way valve core (23), the limiting structure (24) being used to limit the position of the one-way valve core (23) within the second flow port (32).

6. The throttle valve according to claim 1, characterized in that, The second flow port (32) includes a first hole section (321), a transition section and a second hole section (322) that are connected to each other in sequence. The first hole section (321) is located near the first end of the valve seat (21). The diameter of the first hole section (321) is smaller than the diameter of the second hole section (322). The one-way valve core (23) is located in the second hole section (322) and is used to block the first hole section (321).

7. The throttle valve according to claim 1, characterized in that, A fixing structure is provided between the valve seat (21) and the housing (10).

8. The throttle valve according to claim 7, characterized in that, The fixing structure includes a limiting groove (41) and a limiting protrusion (42). The limiting groove (41) is disposed on the outer wall of the valve seat (21), and the limiting protrusion (42) is disposed on the inner wall of the housing (10). The limiting protrusion (42) and the limiting groove (41) cooperate to engage and fix the valve seat (21) inside the housing (10).

9. The throttle valve according to claim 1, characterized in that, The valve core assembly (22) includes: The end cap (221) is fixedly disposed at the first end of the valve seat (21); A valve needle (222) is movably disposed in the valve cavity (33), and one end of the valve needle (222) passes through the valve port (34); A spring (223), one end of which is connected to the end cap (221), and the other end of which is connected to the valve needle (222).

10. The throttle valve according to any one of claims 1 to 9, characterized in that, There are two valve body assemblies (20), and the second ends of the valve seats (21) of the two valve body assemblies (20) are disposed facing each other in the flow channel of the housing (10).

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