Throttling device and refrigeration apparatus

Abstract

The application discloses a throttling device and refrigeration equipment, the throttling device comprises a shell pipe and a throttle valve fixed in the shell pipe to separate a flow channel of the shell pipe into a front flow channel and a rear flow channel. The throttle valve comprises a valve seat, a valve core with a throttling hole, and a movable piece. The valve seat is provided with a constant-through flow channel communicated with the front flow channel, and an adjusting flow channel communicated between the constant-through flow channel and the rear flow channel; a side wall of the adjusting flow channel is provided with a through-flow hole, and a through-flow gap is formed between the side wall of the adjusting flow channel and an inner circumferential surface of the shell pipe, the through-flow gap and the through-flow hole are communicated to form a through-flow flow channel, the through-flow flow channel is used for communicating the adjusting flow channel and the rear flow channel; the valve core is fixed in the adjusting flow channel, an active groove penetrating along an axial direction of the valve core is formed between an outer circumferential surface of the valve core and an inner wall surface of the adjusting flow channel; and the movable piece is movably embedded in the active groove, so that the movable piece can be moved to open and close the through-flow flow channel. The throttling device can reduce impact or friction noise generated in the working process.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to a throttling device and refrigeration equipment. Background Technology

[0002] Refrigerant lines in refrigeration equipment are typically equipped with throttling devices to regulate refrigerant flow. These devices include a throttling valve with a valve seat and a valve core movably mounted within the seat. The valve core moves relative to the valve seat when the refrigerant flow direction changes, switching the fluid's (e.g., refrigerant's) flow path and thus regulating the flow rate. However, the valve core of such throttling valves is usually quite heavy, exhibiting significant inertia during movement. Therefore, when the valve core moves due to fluid flow direction changes, it is prone to jerking, resulting in a strong impact with the inner wall of the valve seat under its strong inertia, producing significant impact or friction noise. Summary of the Invention

[0003] The main objective of this invention is to provide a throttling device that addresses the impact or friction noise generated during the operation of a throttling valve.

[0004] To achieve the above objectives, the present invention proposes a throttling device, comprising a shell tube and a throttling valve fixed within the shell tube to divide the flow channel of the shell tube into a front flow channel and a rear flow channel. The throttling valve includes a valve seat, a valve core with a throttling orifice, and a movable component. The valve seat has a normally open flow channel communicating with the front flow channel, and a regulating flow channel communicating with the rear flow channel. The sidewall of the regulating flow channel has a flow hole, and a flow gap is formed between the sidewall of the regulating flow channel and the inner circumferential surface of the shell tube. The flow gap and the flow hole communicate to form a flow channel, which connects the regulating flow channel and the rear flow channel. The valve core is fixed within the regulating flow channel, and a movable groove is formed between the outer circumferential surface of the valve core and the inner wall surface of the regulating flow channel, extending axially along the valve core. The movable component is movably embedded in the movable groove, allowing the movable component to move and open / close the flow channel.

[0005] Optionally, the movable element is axially movable along the valve core to open or close the flow gap, thereby opening or closing the flow passage.

[0006] Optionally, the movable component includes a movable part movably inserted into the movable groove, and a sealing part disposed on the rear side of the valve core and connected to the movable part; the periphery of the sealing part is in contact with the inner wall of the regulating flow channel to open and close the flow gap; the sealing part is also provided with a connecting hole, which is used to communicate with the flow gap after the sealing part opens the flow gap.

[0007] Optionally, the movable part is sleeve-shaped and surrounds the outer periphery of the connecting hole. The side wall of the movable part is provided with a strip-shaped notch extending along its axial direction. The strip-shaped notch is suitable for connecting the flow gap and the connecting hole after the sealing part opens the flow gap.

[0008] Optionally, the movable part is provided with two strip-shaped notches, which divide the movable part into two movable sides; two movable grooves are provided between the outer peripheral surface of the valve core and the inner wall surface of the regulating flow channel, and the two movable grooves are respectively used for the insertion and connection of the two sub-movable sides.

[0009] Optionally, the outer peripheral surface of the valve core is provided with connecting ribs on both sides, and the connecting ribs pass through the strip notch and are connected and fixed to the valve seat.

[0010] Optionally, a stop protrusion is provided on the inner wall surface of the regulating channel near the rear channel. The stop protrusion is spaced apart from the end face of the valve core facing the rear channel to abut against the blocking part of the movable member.

[0011] Optionally, the sealing part has a reinforcing boss protruding from its side facing the valve core, and the reinforcing boss passes through the communicating hole; the movable part is connected to the reinforcing boss.

[0012] Optionally, the movable element is axially movable along the valve core to open or close the flow orifice, thereby opening or closing the flow passage.

[0013] Optionally, the movable component includes a movable part that is movably inserted into the movable slot, and a sealing part disposed at one end of the regulating flow channel near the normally open flow channel and connected to the movable part; the sealing part is fitted against the side of the shell tube corresponding to the flow hole to open or close the flow hole.

[0014] Optionally, a collar is provided at the end of the movable part away from the blocking part, the inner periphery of the collar is sleeved on the outer periphery of the valve core, and the outer periphery of the collar contacts and engages with the inner wall surface of the regulating flow channel.

[0015] Optionally, an annular baffle is provided at the connection between the movable part and the sealing part, and the annular baffle is used to abut against the end face of the valve core facing the normally open flow channel.

[0016] Optionally, the outer peripheral surface of the valve core is provided with a connecting rib that is fixed to the inner wall of the regulating flow channel, and the connecting rib extends along the axial direction of the valve core; the movable part is provided with a strip-shaped notch for the connecting rib to pass through.

[0017] Optionally, the outer wall surface of the sealing part is provided with a limiting rib extending in the same direction as the strip-shaped notch, and the inner wall surface of the adjusting channel is provided with a limiting groove that is inserted and cooperates with the limiting rib.

[0018] Optionally, the moving part is made of a non-metallic material.

[0019] The technical solution of the present invention involves fixing the valve core of the throttle valve within the regulating flow channel of the valve seat. The side wall of the regulating flow channel is provided with a flow passage hole, and the side wall of the regulating flow channel and the inner circumferential surface of the shell tube are provided with a flow passage gap. The flow passage gap and the flow passage hole are connected to form a flow passage, which is used to connect the regulating flow channel and the rear flow channel. A movable groove is provided between the outer circumferential surface of the valve core and the inner wall surface of the regulating flow channel, extending axially along the valve core. A movable component is movably embedded in the movable groove, so that the flow passage can be opened and closed by the movable component without moving the valve core. Because the movable part is embedded in the movable groove between the outer peripheral surface of the valve core and the inner wall surface of the regulating flow channel, the volume of the movable part is relatively small and the mass is relatively light compared to the volume and mass of the valve core. As a result, the inertial force generated by the movable part during movement is small. When the movable part moves under the action of fluid switching direction, the contact and collision force between the movable part and the inner wall surface of the regulating flow channel is small, and it is not easy to generate large impact or friction noise. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the throttling device of the present invention;

[0022] Figure 2 for Figure 1 Cross-sectional view of the throttling device along line II;

[0023] Figure 3 for Figure 2 A schematic diagram of fluid flow direction when the throttle valve is in flow-through mode;

[0024] Figure 4 for Figure 2 A schematic diagram of fluid flow direction when the throttling valve is in throttling mode;

[0025] Figure 5 for Figure 1A cross-sectional view of the throttling device from another perspective;

[0026] Figure 6 for Figure 1 Schematic diagram of the structure of the throttle valve;

[0027] Figure 7 for Figure 6 A top view of the valve seat and valve core of the medium-throttle valve after they are connected and fixed.

[0028] Figure 8 for Figure 6 Side view of the moving part of the throttle valve;

[0029] Figure 9 for Figure 8 Top view of the moving part;

[0030] Figure 10 This is a schematic diagram of another embodiment of the throttling device of the present invention;

[0031] Figure 11 for Figure 10 Cross-sectional view of the throttling device along line II-II;

[0032] Figure 12 for Figure 11 A schematic diagram of fluid flow direction when the throttle valve is in flow-through mode;

[0033] Figure 13 for Figure 12 A schematic diagram of the status of the throttle valve;

[0034] Figure 14 for Figure 11 A schematic diagram of fluid flow direction when the throttling valve is in throttling mode;

[0035] Figure 15 for Figure 14 A schematic diagram of the status of the throttle valve;

[0036] Figure 16 for Figure 10 A schematic diagram of the internal structure of a medium-throttle valve after the valve seat and valve core are connected and fixed.

[0037] Figure 17 for Figure 16 Top view of the valve seat and valve core after they are connected and fixed;

[0038] Figure 18 for Figure 11 Structural diagram of the moving parts;

[0039] Figure 19 for Figure 18 A sectional view along line III-III;

[0040] Figure 20 for Figure 18 A cross-sectional view along line IV-IV.

[0041] Explanation of icon numbers:

[0042] label name label name 100 Shell tube 220 valve core 110 front flow channel 221 throttle orifice 120 Backflow channel 222 Connecting ribs 101 Pre-filter 223 Active slot 102 Post-filter 230 Active parts 200 Throttling valve 231 Activities Department 210 valve seat 231a Strip notch 211 Normal flow channel 231b Active side 212 Adjusting the flow channel 232 Blocking Department 213 Flow channel 2301 Connecting hole 213a Flow orifice 2302 Strengthened boss 213b Flow gap 2303 Limiting ribs 214 Limiting groove 2304 Ring 215 Stop protrusion 2305 Annular baffle

[0043] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0047] This invention provides a throttling device that can be applied to the refrigeration piping of refrigeration equipment to regulate the flow rate of the refrigerant after a change in flow direction. Of course, the throttling valve 200 can also be applied to other piping systems that require flow rate regulation after a fluid change in flow direction. The throttling device of this invention not only reduces the impact or friction noise generated during operation, but also...

[0048] Please see Figure 1 and Figure 2In one embodiment of the throttling device of the present invention, the throttling device includes a shell tube 100 and a throttling valve 200 fixed within the shell tube 100 to divide the flow passage of the shell tube 100 into a front flow passage 110 and a rear flow passage 120. The throttling valve 200 includes a valve seat 210, a valve core 220 having a throttling orifice 221, and a movable element 230. The valve seat 210 is provided with a normally open flow channel 211 that communicates with the front flow channel 110, and an adjusting flow channel 212 that connects the normally open flow channel 211 and the rear flow channel 120. The side wall of the adjusting flow channel 212 is provided with a flow hole 213a, and the side wall of the adjusting flow channel 212 and the inner circumferential surface of the shell tube 100 are provided with a flow gap 213b. The flow gap 213b and the flow hole 213a are connected to form a flow channel 213, which is used to connect the adjusting flow channel 212 and the rear flow channel 120. The valve core 220 is fixed in the adjusting flow channel 212, and a movable groove 223 that runs through the axial direction of the valve core 220 is provided between the outer circumferential surface of the valve core 220 and the inner wall surface of the adjusting flow channel 212. The movable member 230 is movably embedded in the movable groove 223 so that the movable member 230 can move to open and close the flow channel 213.

[0049] Specifically, the casing 100 of the throttling device has a flow channel inside, which is divided into a front flow channel 110 and a rear flow channel 120 by the throttling valve 200. A front filter 101 is provided in the front flow channel 110, covering its cross-section; a rear filter 102 is provided in the rear flow channel 120, covering its cross-section. Either the front filter 101 or the rear filter 102 can be made of metal, for example, both can be metal mesh.

[0050] For the throttle valve 200, the valve seat 210 of the throttle valve 200 is fixedly connected to the inner wall of the shell tube 100; the valve core 220 of the throttle valve 200 is fixed in the regulating flow channel 212 of the valve seat 210, and the throttle orifice 221 of the valve core 220 penetrates the valve core 220 axially, and the diameter of the throttle orifice 221 is smaller than the diameter of the flow passage orifice 213a, so that the flow surface of the throttle orifice 221 is smaller than the flow surface of the flow passage orifice 213a, for throttling. The throttle valve 200 has a throttling mode and a flow passage mode, and the throttle valve 200 is suitable for switching between the throttling mode and the flow passage mode under the action of fluid flow direction switching. The fluid can be refrigerant or ordinary water, or other liquids that need to switch flow direction. The working principle of the throttle valve 200 is described below.

[0051] Please see Figure 3When fluid is input from the front flow channel 110 of the shell tube 100, the fluid enters the regulating flow channel 212 through the normally open flow channel 211 of the throttle valve 200. The fluid pushes the movable part 230 to move along the movable groove 223 toward the rear flow channel 120, so that the movable part 230 opens the flow channel 213, and the throttle valve 200 switches to the flow mode. At this time, since the diameter of the flow orifice 213a is larger than that of the throttle orifice 221, the fluid will pass through the flow orifice 213a and flow to the rear flow channel 120, so the flow rate of the fluid passing through the throttle valve 200 is larger, thus realizing the flow mode.

[0052] Please see Figure 4 When fluid is input from the rear flow channel 120 of the shell tube 100, the fluid enters the regulating flow channel 212 through the opening at the rear end of the regulating flow channel 212 of the throttle valve 200. The fluid pushes the movable part 230 to move forward to the flow channel 110, causing the movable part 230 to gradually close the flow passage 213, so that the valve core 220 switches to the throttling mode. At this time, the fluid can only pass through the throttling orifice 221 of the valve core 220 and enter the normally open flow channel 211. Since the diameter of the throttling orifice 221 is smaller than the diameter of the flow passage 213a, the flow rate of the fluid entering the normally open flow channel 211 through the throttling orifice 221 of the valve core 220 is reduced, thus achieving throttling.

[0053] During the aforementioned fluid flow direction switching process, the valve core 220 of the throttle valve 200 remains stationary, while the throttle valve 200 switches to the corresponding mode by the axial movement of the movable component 230. Since the movable component 230 is embedded in the movable groove 223 between the outer circumferential surface of the valve core 220 and the inner wall surface of the regulating channel 212, its volume and weight are relatively small compared to the valve core 220. This results in a smaller inertial force generated during the movement of the movable component 230. When the movable component 230 moves under the influence of fluid flow direction switching, the contact and collision force between the movable component 230 and the inner wall surface of the regulating channel 212 is small, making it less prone to generating significant impact or friction noise.

[0054] It is worth mentioning that the moving part 230 should preferably be made of a non-metallic material, such as plastic or rubber. This makes the moving part 230 lighter, reduces the inertial force generated during movement, and makes it less likely to produce heavy impacts when in contact with the inner wall of the valve seat 210, thereby avoiding significant metal-on-metal collision noise.

[0055] The technical solution of the present invention involves fixing the valve core 220 of the throttle valve 200 within the regulating flow channel 212 of the valve seat 210. The side wall of the regulating flow channel 212 is provided with a flow passage hole 213a, and the side wall of the regulating flow channel 212 and the inner circumferential surface of the shell tube 100 are provided with a flow passage gap 213b. The flow passage gap 213b and the flow passage hole 213a are connected to form a flow passage 213, which is used to connect the regulating flow channel 212 and the rear flow channel 120. A movable groove 223 is provided between the outer circumferential surface of the valve core 220 and the inner wall surface of the regulating flow channel 212, which extends axially through the valve core 220. The movable member 230 is movably embedded in the movable groove 223, so that the flow passage 213 can be opened and closed by the movable member 230 without the valve core 220 moving. Since the movable part 230 is embedded in the movable groove 223 between the outer peripheral surface of the valve core 220 and the inner wall surface of the regulating flow channel 212, the volume of the movable part 230 is relatively small and the mass is relatively light compared with the volume and mass of the valve core 220. As a result, the inertial force generated by the movable part 230 during movement is small. When the movable part 230 moves under the action of fluid switching direction, the contact and collision force between the movable part 230 and the inner wall surface of the regulating flow channel 212 is small, and it is not easy to generate large impact or friction noise.

[0056] Understandably, since the flow channel 213 is formed by the flow hole 213a on the side wall of the regulating flow channel 212 and the flow gap 213b between the side wall of the regulating flow channel 212 and the inner wall surface of the shell tube 100, the movable member 230 can switch the flow channel 213 on and off by switching the flow hole 213a or by switching the flow gap 213b. A detailed description of the structure of the movable member 230 will follow later.

[0057] Please see Figures 5 to 7 In one embodiment, the movable member 230 is axially movable along the valve core 220 to switch the flow passage 213b, thereby switching the flow passage 213. The specific implementation of the movable member 230 switching the flow passage 213b will be described below in conjunction with the structure of the movable member 230.

[0058] Optionally, the movable component 230 includes a movable part 231 movably inserted into the movable slot 223, and a blocking part 232 disposed in the rear channel and connected to the movable part 231; the periphery of the blocking part 232 is in contact with the inner wall of the rear channel for switching the flow gap 213b; the blocking part 232 is also provided with a connecting hole 2301, which can connect the flow gap 213b and the rear flow channel 120 after the blocking part 232 opens the flow gap 213b.

[0059] Specifically, the movable part 231 of the movable component 230 is movably inserted into the movable groove 223 from one end of the movable groove 223 facing the rear flow channel 120; the sealing part 232 of the movable component 230 is exposed at the rear end of the valve seat 210. The sealing part 232 is disc-shaped, and its outer periphery is in contact with the inner wall surface of the regulating flow channel 212. The diameter of the connecting hole 2301 on the sealing part 232 is larger than the diameter of the throttling hole 221.

[0060] Please see Figure 3 When fluid is input from the front flow channel 110 of the shell tube 100, the fluid enters the regulating flow channel 212 through the normally open flow channel 211 of the throttle valve 200. The fluid pushes the movable part 230 to move along the movable groove 223 towards the rear flow channel 120, so that the blocking part 232 of the movable part 230 moves away from the rear end face of the valve core 220, thereby opening the flow gap 213b. The flow channel 213 is opened, which makes the throttle valve 200 switch to the flow mode. At this time, since the diameter of the flow hole 213a is larger than that of the throttle hole 221, the fluid will pass through the flow hole 213a, the flow gap 213b, and the connecting hole 2301 in sequence and flow to the rear flow channel 120. Thus, the flow rate of the fluid passing through the throttle valve 200 is larger, realizing the flow.

[0061] Please see Figure 4 When fluid is input from the rear flow channel 120 of the shell tube 100, the fluid pushes the blocking part 232 of the movable member 230, causing the movable member 230 to move towards the front flow channel 110 until the blocking part 232 of the movable member 230 abuts against the rear end face of the valve core 220. At this time, the blocking part 232 of the movable member 230 closes the flow passage 213b, and the flow passage 213 is blocked, thereby the valve core 220 switches to the throttling mode. At this time, the fluid can only enter the throttling orifice 221 of the valve core 220 through the connecting hole 2301 on the blocking part 232 of the movable member 230, and then pass through the throttling orifice 221 and enter the normally open flow channel 211. Since the diameter of the throttling orifice 221 is smaller than the diameter of the flow passage 213a, the flow rate of the fluid entering the normally open flow channel 211 through the throttling orifice 221 of the valve core 220 is reduced, thus achieving throttling.

[0062] For a connection between the connecting hole 2301 and the flow gap 213b after the flow gap 213b is opened in the sealing part 232, a perforated structure can be provided on the movable part 231 of the movable member 230 to connect the connecting hole 2301 and the flow gap 213b. The perforated structure can be a notch, a through hole, a slit, or other similar structure.

[0063] Please see Figures 6 to 9In this embodiment, the movable part 231 is sleeve-shaped and surrounds the outer periphery of the connecting hole 2301. The side wall of the movable part 231 is provided with a strip-shaped notch 231a extending along its axial direction. The strip-shaped notch 231a is suitable for connecting the flow gap 213b and the connecting hole 2301 after the blocking part 232 opens the flow gap 213b. When the throttle valve 200 is in the throttle mode, the strip-shaped notch 231a is hidden in the movable groove 223 of the valve core 220 along with the movable part 231. When the throttle valve 200 is in the flow mode, the strip-shaped notch 231a moves to the rear side of the valve seat 210 along with the movable part 231, thereby connecting the flow gap 213b and the connecting hole 2301.

[0064] Furthermore, the movable part 231 is provided with two strip-shaped notches 231a, which divide the movable part 231 into two movable sides 231b; two movable grooves 223 are provided between the outer peripheral surface of the valve core 220 and the inner wall surface of the regulating flow channel 212, and the two movable grooves 223 respectively allow the two sub-movable sides 231b to be movably inserted.

[0065] Specifically, the two strip-shaped notches 231a of the movable part 231 are arranged opposite to each other, thereby dividing the movable part 231 into two oppositely arranged movable sides 231b, each movable side 231b having a semi-circular cross-section. Correspondingly, two opposite movable grooves 223 are provided between the outer peripheral surface of the valve core 220 and the inner wall surface of the regulating flow channel 212. The cross-sections of the two movable grooves 223 are also semi-circular, and the two movable grooves 223 are respectively movably inserted into the two movable sides 231b of the movable member 230.

[0066] Furthermore, to facilitate the fixing of the valve core 220, connecting ribs 222 are protruding on both opposite sides of the outer peripheral surface of the valve core 220. The connecting ribs 222 pass through the strip-shaped notch 231a and are connected and fixed to the valve seat 210. During the movement of the movable part 230, the strip-shaped notch 231a can avoid the connecting ribs 222, thereby avoiding interference with the connecting ribs 222. The connecting ribs 222 can be interference-fitted with the limiting groove 214, or they can be glued with waterproof adhesive; there is no limitation here.

[0067] Considering that when fluid is input from the front flow channel 110 of the throttling device, the force exerted by the fluid on the movable member 230 may be relatively large, and the movable member 230 may continue to move backward after opening the flow passage 213b, potentially disengaging from the movable slot 223. To reduce the occurrence of this situation, a stop protrusion 215 may be provided on the inner wall surface of the regulating flow channel 212 near the rear flow channel 120. The stop protrusion 215 is spaced apart from the end face of the valve core 220 facing the rear flow channel 120 to abut against the blocking portion 232 of the movable member 230.

[0068] Thus, when fluid enters from the front flow channel 110 of the throttling device, the fluid pushes the blocking part 232 of the movable member 230 backward to open the flow gap 213b. If the movable member 230 continues to move backward, the blocking part 232 of the movable member 230 will abut against the stop protrusion 215, making it difficult for the movable member 230 to move backward. This keeps the movable part 231 of the movable member 230 inserted into the movable groove 223, ensuring that the movable member 230 can move in the reverse direction later. It is understood that the distance between the stop protrusion 215 and the valve core 220 should be less than the length of the movable part 231 of the movable member 230 inserted into the movable groove 223, to ensure that when the blocking part 232 of the movable member 230 abuts against the stop protrusion 215, a portion of the movable part 231 of the movable member 230 is still inserted into the movable groove 223.

[0069] Please see Figure 8 and Figure 9 Furthermore, a reinforcing boss 2302 protrudes from the side of the sealing part 232 facing the valve core 220, and the reinforcing boss 2302 has the flow port extending through it; the movable part 231 is connected to the reinforcing boss 2302. The reinforcing boss 2302 is used to enhance the air resistance of the sealing part 232, so that the sealing part 232 is less likely to deform under the impact of fluid and affect the throttling effect of the throttling valve 200.

[0070] Please see Figure 10 and Figure 11 In another embodiment, unlike the above embodiment, the movable member 230 is movable along the axial direction of the valve core 220 to open and close the flow passage 213a, thereby opening and closing the flow channel 213. The specific implementation of the movable member 230 opening and closing the flow passage 213a will be described below in conjunction with the structure of the movable member 230.

[0071] Optionally, the movable part 230 includes a movable part 231 that is movably inserted into the movable slot 223, and a blocking part 232 located at one end of the regulating flow channel 212 near the normally open flow channel 211 and connected to the movable part 231; the blocking part 232 is in contact with the side of the corresponding flow hole 213a of the shell tube 100 to open and close the flow hole 213a.

[0072] Specifically, the movable component 230 is entirely located within the regulating flow channel 212; wherein, the movable portion 231 of the movable component 230 is movably inserted into the movable groove 223 between the outer peripheral surface of the valve core 220 and the inner wall surface of the regulating flow channel 212; the blocking portion 232 of the movable component 230 is located at the front end of the valve core 220, and the blocking portion 232 is in contact with the inner wall surface of the regulating flow channel 212, so that it can open or block the flow hole 213a as the movable portion 231 moves. The blocking portion 232 can be a cylindrical structure extending from the movable portion 231, or it can be a stop arm structure extending from the movable portion 231.

[0073] Please see Figure 12 and Figure 13 When fluid is input from the front flow channel 110 of the shell tube 100, the fluid enters the regulating flow channel 212 through the normally open flow channel 211 of the throttle valve 200. The fluid pushes the movable part 230 to move along the movable groove 223 towards the rear flow channel 120, so that the blocking part 232 of the movable part 230 moves backward and away from the flow hole 213a, thereby opening the flow hole 213a and opening the flow channel 213, which makes the throttle valve 200 switch to the flow mode. At this time, since the diameter of the flow hole 213a is larger than that of the throttle hole 221, the fluid will pass through the flow hole 213a and the flow gap 213b in sequence and flow to the rear flow channel 120. Thus, the flow rate of the fluid passing through the throttle valve 200 is larger, realizing the flow.

[0074] Please see Figure 14 and Figure 15 When fluid is input from the rear flow channel 120 of the shell tube 100, the fluid enters the regulating flow channel 212 through the opening at the rear end of the regulating flow channel 212 and pushes the movable part 230 toward the front flow channel 110 until the blocking part 232 of the movable part 230 moves to cover the flow passage 213a. At this time, the blocking part 232 of the movable part 230 closes the flow passage 213a, and the flow passage 213 is blocked, so the valve core 220 switches to the throttling mode. At this time, the fluid can only pass through the throttling orifice 221 of the valve core 220 of the movable part 230 and enter the normally open flow channel 211. Since the diameter of the throttling orifice 221 is smaller than the diameter of the flow passage 213a, the flow rate of the fluid entering the normally open flow channel 211 through the throttling orifice 221 of the valve core 220 is reduced, thus achieving throttling.

[0075] Please see Figures 16 to 19Furthermore, a collar 2304 is provided at the end of the movable part 231 furthest from the sealing part 232. The inner periphery of the collar 2304 is fitted around the outer periphery of the valve core 220, and the outer periphery of the collar 2304 is in contact with the inner wall of the regulating flow channel 212. During the movement of the movable part 231, the collar 2304 always maintains contact with the outer periphery of the valve core 220 and the inner wall of the regulating flow channel 212, thereby preventing fluid from passing through the movable groove 223 and affecting the stability of the throttle valve 200. In addition, the collar 2304 can increase the frictional force between the movable part 231 and the outer periphery of the valve core 220, preventing the movable part 231 from falling off the valve core 220. It should be noted that the moving part 230 is made of non-metallic materials, such as plastic and rubber, which makes the moving part 230 lighter. Therefore, even if there is friction between the moving part 230 and the valve core 220 during the movement of the moving part 230 relative to the valve core 220, the degree of friction is relatively small and will not produce metallic noise like metal friction.

[0076] Furthermore, the collar 2304 increases the contact area between the moving part 230 and the fluid, which helps the fluid to push the moving part 230 when changing flow direction. For example, when fluid enters from the front flow channel 110 of the shell tube 100, the force exerted by the fluid on the collar 2304 can increase the backward thrust of the fluid on the moving part 230, thereby helping to smoothly push the moving part 230 to the open flow passage 213a. When fluid enters from the rear flow channel 120 of the shell tube 100, the force exerted by the fluid on the collar 2304 can also increase the forward thrust of the fluid on the moving part 230, thereby helping to smoothly push the moving part 230 to the closed flow passage 213a.

[0077] Please see Figure 15 , Figures 18 to 20 Furthermore, an annular baffle 2305 is provided at the connection between the movable part 231 and the blocking part 232. The annular baffle 2305 is used to abut against the end face of the valve core 220 facing the normally open flow channel 211. Specifically, the movable part 231 is sleeve-shaped and surrounds the outer periphery of the valve core 220; the blocking part 232 is also sleeve-shaped and is connected to the movable part 231 to form an integral structure. The inner diameter of the blocking part 232 is smaller than the inner diameter of the movable part 231, and the annular baffle 2305 is formed at the connection position between the movable part 231 and the blocking part 232.

[0078] When fluid is input from the front flow channel 110 of the shell tube 100, the fluid pushes the movable part 230 to move backward, causing the blocking part 232 of the movable part 230 to open the flow port; after the blocking part 232 opens the flow port, if the fluid continues to push the blocking part 232 to move backward, the annular baffle 2305 between the blocking part 232 and the movable part 231 will abut against the front end face of the valve core 220, thereby restricting the movable part 230 from moving backward, and thus preventing the movable part 230 from moving backward out of the valve core 220.

[0079] Please see Figures 16 to 19 Optionally, to fix the valve core 220, a connecting rib 222 is provided on the outer peripheral surface of the valve core 220. The connecting rib 222 extends along the axial direction of the valve core 220 and is connected and fixed to the inner wall of the regulating flow channel 212. To enhance the stability of the connection between the valve core 220 and the valve seat 210, connecting ribs 222 are provided on both opposite sides of the outer peripheral surface of the valve core 220. To avoid the connecting ribs 222, the movable part 231 is provided with a strip-shaped notch 231a for the connecting ribs 222 to pass through.

[0080] Specifically, the two strip-shaped notches 231a of the movable part 231 are arranged opposite to each other, thereby dividing the movable part 231 into two oppositely arranged movable sides 231b, each movable side 231b having a semi-circular cross-section. Correspondingly, two opposite movable grooves 223 are provided between the outer peripheral surface of the valve core 220 and the inner wall surface of the regulating flow channel 212. The cross-sections of the two movable grooves 223 are also semi-circular, and the two movable grooves 223 are respectively movably inserted into the two movable sides 231b of the movable member 230.

[0081] During the impact of fluid flow direction switching, the moving part 230 may rapidly move along the axial direction of the valve core 220 or rotate around its circumference, generating noise from the movement and collision. The moving portion 231 of the moving part 230 engages with the connecting rib 222 via a strip-shaped notch 231a. The connecting rib 222 restricts the rotational movement of the moving part 230 along its circumference, making rotation difficult and reducing noise caused by the movement and collision. Furthermore, the contact between the strip-shaped notch 231a and the connecting rib 222 generates friction, which slows down the axial movement of the moving part 230 along the valve core 220, further reducing noise from the movement and collision.

[0082] Please see Figure 16 and Figure 18Furthermore, a limiting rib 2303 extending in the same direction as the strip-shaped notch 231a can be provided on the outer wall surface of the sealing part 232, and a limiting groove 214 is provided on the inner wall surface of the regulating channel 212 to fit into the limiting rib 2303. During the movement of the movable part 230, the limiting rib 2303 on the outer wall surface of the sealing part 232 also moves in the same direction along the limiting groove 214. Through the cooperation of the limiting rib 2303 and the limiting groove 214, the movable part 230 can also restrict the rotational movement of the movable part 230 along its circumferential direction and increase the frictional force between the movable part 230 and the valve seat 210, thereby reducing the axial or circumferential movement of the movable part 230 along the valve core 220 and greatly reducing the noise generated by the axial movement and collision of the movable part 230.

[0083] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A throttling device, characterized in that, The throttling device includes a shell tube and a throttling valve disposed within the shell tube to divide the flow channel of the shell tube into a front flow channel and a rear flow channel, the throttling valve comprising: The valve seat has a normally open flow channel communicating with the front flow channel, and an adjusting flow channel communicating with the rear flow channel; the side wall of the adjusting flow channel has a flow hole, and the side wall of the adjusting flow channel and the inner circumferential surface of the shell tube have a flow gap, the flow gap and the flow hole communicating to form a flow channel, the flow channel being used to communicate with the adjusting flow channel and the rear flow channel; A valve core having a throttling orifice, the valve core being fixed within the regulating flow channel, and a movable groove extending axially through the valve core being provided between the outer peripheral surface of the valve core and the inner wall surface of the regulating flow channel; and A movable component is movably embedded in the movable slot so that the movable component can move to open and close the flow channel.

2. The throttling device as described in claim 1, characterized in that, The movable element is axially movable along the valve core to open and close the flow gap, thereby opening and closing the flow passage.

3. The throttling device as described in claim 2, characterized in that, The movable component includes a movable part that is movably inserted into the movable slot, and a sealing part located on the rear side of the valve core and connected to the movable part; the periphery of the sealing part is in contact with the inner wall of the regulating flow channel to open and close the flow gap; the sealing part is also provided with a connecting hole, which is used to communicate with the flow gap after the sealing part opens the flow gap.

4. The throttling device as described in claim 3, characterized in that, The movable part is sleeve-shaped and surrounds the outer periphery of the connecting hole. The side wall of the movable part is provided with a strip-shaped notch extending along its axial direction. The strip-shaped notch is suitable for connecting the flow gap and the connecting hole after the sealing part opens the flow gap.

5. The throttling device as described in claim 4, characterized in that, The movable part is provided with two strip-shaped notches, which divide the movable part into two movable sides; two movable grooves are provided between the outer peripheral surface of the valve core and the inner wall surface of the regulating flow channel, and the two movable grooves are respectively used for the two sub-movable sides to be inserted and connected.

6. The throttling device as described in claim 5, characterized in that, The outer circumferential surface of the valve core is provided with connecting ribs on both sides, and the connecting ribs pass through the strip notch and are connected and fixed to the valve seat.

7. The throttling device according to any one of claims 3 to 6, characterized in that, The inner wall surface of the regulating channel near the rear channel is provided with a stop protrusion, which is spaced apart from the end face of the valve core facing the rear channel, so as to abut against the blocking part of the moving part.

8. The throttling device according to any one of claims 3 to 6, characterized in that, The sealing part has a reinforcing boss protruding from the side facing the valve core, and the reinforcing boss has the communicating hole through it; the movable part is connected to the reinforcing boss.

9. The throttling device as claimed in claim 1, characterized in that, The movable element is axially movable along the valve core to open and close the flow orifice, thereby opening and closing the flow passage.

10. The throttling device as claimed in claim 9, characterized in that, The movable component includes a movable part that is movably inserted into the movable slot, and a sealing part located at one end of the regulating flow channel near the normally open flow channel and connected to the movable part; the sealing part is fitted against the side of the shell tube corresponding to the flow hole to open or close the flow hole.

11. The throttling device as claimed in claim 10, characterized in that, The movable part is provided with a collar at the end away from the blocking part. The inner periphery of the collar is sleeved on the outer periphery of the valve core, and the outer periphery of the collar is in contact with the inner wall surface of the regulating flow channel.

12. The throttling device as claimed in claim 10, characterized in that, An annular baffle is provided at the connection between the movable part and the sealing part, and the annular baffle is used to abut against the end face of the valve core facing the normally open flow channel.

13. The throttling device according to any one of claims 10 to 12, characterized in that, The outer circumferential surface of the valve core is provided with a connecting rib that is fixed to the inner wall of the regulating flow channel, and the connecting rib extends along the axial direction of the valve core; the movable part is provided with a strip-shaped notch for the connecting rib to pass through.

14. The throttling device as claimed in claim 13, characterized in that, The outer wall of the sealing part is provided with a limiting rib extending in the same direction as the strip-shaped notch, and the inner wall of the regulating channel is provided with a limiting groove that is inserted and cooperates with the limiting rib.

15. The throttling device according to any one of claims 1 to 6, characterized in that, The moving parts are made of non-metallic materials.

16. A refrigeration device, characterized in that, The refrigeration equipment includes a compressor, a condenser, an evaporator, and a throttling device as described in any one of claims 1 to 15, wherein the compressor is connected to the condenser, the evaporator, and the throttling device via refrigerant pipes.

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