Throttle valve

Abstract

The utility model relates to a throttle valve which comprises a valve body, a valve core, a valve rod, a valve rod and a valve rod. The valve seat is arranged in the valve cavity, a valve chamber extending in the axial direction of the valve body is defined in the valve seat, the two ends of the valve chamber are open, and a through hole communicated with the valve cavity and the valve chamber is formed in the peripheral wall of the valve seat; the valve element is arranged in the valve chamber, at least two throttling channels communicated with the valve chamber penetrate through the valve element, and the valve element is arranged to move in the axial direction of the valve body so as to open or close the through hole. By means of the design, disturbance of fluid in the valve seat and formation of vortex flow are reduced, the uniformity of a flow field on the inner wall face of the valve seat is improved, the intensity of turbulent flow is reduced, and therefore a good noise reduction effect is achieved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a throttle valve. Background Art

[0002] Currently, throttle valves are widely used in electrical appliances such as air conditioners and refrigerators. The throttle valve mainly controls the fluid flow rate by changing the size of the throttle section or the length of throttling.

[0003] Air conditioners, refrigerators and other electrical appliances are considered to be the main sources of indoor environmental noise, especially the noise generated during the flow of refrigerant. Among them, the throttle valve in the air conditioning system will produce discontinuous whistling noise during operation, that is, generate noise. Therefore, the throttle valve is also one of the sources of indoor noise, which will seriously affect the comfort of users in severe cases. Utility Model Content

[0004] Based on this, it is necessary to provide a throttle valve to reduce noise by reducing the turbulence intensity.

[0005] This application provides a throttle valve, including: a valve body with a valve cavity that is open at both ends; a valve seat disposed in the valve cavity, and an inner part of the valve seat defines a valve chamber extending along the axial direction of the valve body, and both ends of the valve chamber are open. Through holes communicating the valve cavity and the valve chamber are formed on the peripheral wall of the valve seat; a valve core disposed in the valve chamber, and at least two throttle channels communicating with the valve chamber penetrate through the valve core. The valve core is arranged to be movable along the axial direction of the valve body to open or close the through hole.

[0006] It can be understood that the design of the throttle channels causes a certain pressure drop after the refrigerant is throttled. By providing at least two throttle channels in the valve core, the flow field uniformity on the inner wall surface of the valve seat is improved, and the intensity of turbulence is reduced, thereby achieving a better noise reduction effect.

[0007] In one embodiment, the throttle channels extend along the axial direction of the valve body. The direction intersecting with the axial direction of the valve body is defined as the first direction, and at least two of the throttle channels are arranged at intervals along the first direction.

[0008] In one embodiment, there are at least two through holes, which are arranged at intervals along the circumferential direction of the valve seat.

[0009] In one embodiment, the direction in which the valve core moves toward closing the through hole is defined as the second direction. The valve chamber includes a first channel and a second channel arranged in sequence along the second direction. The cross-sectional area of the first channel is larger than that of the second channel. The valve core is located in the first channel, and the through hole is formed on the peripheral wall of the first channel.

[0010] It is understandable that the cross-sectional area of the first channel is larger than that of the second channel, and the wall of the second channel blocks the movement of the valve core. At this time, the valve core only moves back and forth within the second channel.

[0011] In one embodiment, a groove extending along the circumferential direction is formed on the outer peripheral wall of the second channel, and a flange located within the groove is provided on the inner peripheral wall of the valve body at a position corresponding to the groove, and the flange extends along the circumferential direction of the groove.

[0012] In one embodiment, the connection between the peripheries of the open ends of both ends of the throttle channel and the corresponding end walls of the valve core is transitionally connected through a first fillet.

[0013] In one embodiment, the connection between the open periphery of the second channel far from the first channel and the corresponding end wall of the valve seat is transitionally connected through a second fillet.

[0014] In one embodiment, the cross-section of the throttle channel is circular. Define the refrigerant flow rate flowing out of the valve body as z, the diameter of the throttle channel as y, and the number of throttle channels as x. Under the condition that the pressure difference of the throttle valve remains unchanged, the flow rate z, the diameter y, and the number x satisfy: z = b1 * x + exp(b2 * y) + y^b3 + b4; where z is in kg / h, y is in mm, and b1 to b4 are constants, b1 is 35 to 40; b2 is 5 to 8; b3 is 1.1 to 1.3; b4 is -45 to -35.

[0015] In one embodiment, the cross-section of the throttle channel is square or elliptical.

[0016] In one embodiment, the direction in which the valve core moves toward closing the through hole is defined as the second direction, and the cross-sectional area of the throttle channel gradually decreases along the second direction.

[0017] Compared with the prior art, in the throttle valve provided by the present application, a throttle channel is arranged in the valve core. The throttle channel causes a certain pressure drop after the fluid is throttled. There are at least two throttle channels, which reduce the disturbance of the fluid in the valve seat and the formation of vortex flow, improve the flow field uniformity of the inner wall surface of the valve seat, and reduce the intensity of turbulence, thereby achieving a better noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Cross-sectional view of a throttle valve according to an embodiment of the present application in a state of closing the through-hole;

[0020] Figure 2 is Figure 1 Partial enlarged view of the throttle valve shown at A;

[0021] Figure 3 Cross-sectional view of a throttle valve according to an embodiment of the present application in a state of opening the through-hole;

[0022] Figure 4 is Figure 3 Partial enlarged view of the throttle valve shown at B;

[0023] Figure 5 Noise distribution diagram of a throttle valve in a comparative example with one throttle passage provided in the valve core;

[0024] Figure 6 Noise distribution diagram of a throttle valve according to an embodiment of the present application with two throttle passages provided in the valve core;

[0025] Figure 7 Three-dimensional view of a valve core with a cylindrical throttle passage according to an embodiment of the present application;

[0026] Figure 8 Three-dimensional view of a valve core with a cuboid-shaped throttle passage according to another embodiment of the present application;

[0027] Figure 9 Three-dimensional view of a valve core with an elliptical cross-section of a throttle passage according to an embodiment of the present application;

[0028] Figure 10 Three-dimensional view of a valve core with a progressive throttle passage according to an embodiment of the present application.

[0029] Reference numerals: 1, valve body; 10, valve cavity; 11, flange; 2, valve seat; 21, valve chamber; 210, step; 211, first passage; 212, second passage; 213, groove; 214, tapered section; 22, through-hole; 3, valve core; 31, throttle passage; 4, first rounded corner; 5, second rounded corner. Detailed Description of the Invention

[0030] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application will be given with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as "fixed to" or "arranged on" another component, it can be directly on the other component or there may be an intermediate component in between. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0035] In order to reduce the turbulence intensity to reduce noise, this application provides a throttle valve, which is applied in a refrigerator or an air conditioner.

[0036] Please refer to Figures 1 to 8 , the throttle valve includes a valve body 1, a valve seat 2 and a valve core 3. Among them, the valve body 1 is tubular, and the inside of the valve body 1 has a valve cavity 10 with both ends open. The valve seat 2 and the valve core 3 are both arranged in the valve cavity 10. The inside of the valve seat 2 defines a valve chamber 21 extending along the axial direction of the valve body 1, both ends of the valve chamber 21 are open, and through holes 22 communicating the valve cavity 10 and the valve chamber 21 are provided on the peripheral wall of the valve seat 2.

[0037] As Figures 1 to 4 shown, the above-mentioned valve core 3 is arranged in the valve chamber 21, and at least two throttle channels 31 that all extend along the axial direction of the valve body 1 and are all communicated with the valve chamber 21 penetrate through the valve core 3. It should be noted that "axially arranged" means that the overall arrangement direction is along the axial direction, including but not limited to axially extending, and can form an angle with the axial direction. In one embodiment, the throttle channel 31 extends along the axial direction of the valve body 1.

[0038] Define the direction intersecting with the axial direction of the valve body 1 as the first direction X. In one embodiment, there are two throttle channels 31 in the valve core 3, and the two throttle channels 31 are arranged at intervals along the first direction X.

[0039] As Figure 5 and Figure 6 can be seen, compared with the throttle valve in the comparative example with one throttle channel 31 arranged in the valve core 3, the noise peak value is reduced from 73.8 dB to 61.5 dB, and the reduction rate reaches 16.7%, achieving a good noise reduction effect.

[0040] In another embodiment, when the outer diameter dimension of the valve core 3 or the inner diameter dimension of the valve seat 2 is sufficient, three or more throttle channels 31 can be arranged, and the throttle channels 31 are arranged at intervals along the first direction X. In other embodiments, at least part of the throttle channels 31 are arranged annularly around the axis of the valve core 3.

[0041] It can be understood that the design of the throttle channel 31 causes a certain pressure drop after the refrigerant is throttled. By opening at least two throttle channels 31 on the valve core 3, the disturbance of the refrigerant in the valve seat 2 and the formation of vortex flow are reduced, the flow field uniformity of the inner wall surface of the valve seat 2 is improved, and the intensity of turbulence is reduced, thereby achieving a good noise reduction effect.

[0042] There are at least two of the above-mentioned through holes 22, and they are arranged at intervals along the circumferential direction of the valve seat 2. In one embodiment, as Figures 1 to 4 shown, there are two through holes 22, and they are arranged opposite to each other. In another embodiment, there can be three or more through holes 22.

[0043] As Figure 1 shown, the direction in which the valve core 3 moves towards closing the through hole 22 is hereinafter defined as the second direction Y. As Figure 2 and Figure 4As shown, the above valve chamber 21 includes a first channel 211 and a second channel 212 arranged in sequence along the second direction Y, and the cross-sectional area of the first channel 211 is larger than that of the second channel 212. The valve core 3 is located in the first channel 211, and a through hole 22 is provided on the peripheral wall of the first channel 211. The valve core 3 is arranged to move along the axial direction of the valve body 1 so as to open or close the through hole 22. Then, the valve core 3 has a first state and a second state. In the first state, as Figure 1 and Figure 2 shown, the valve core 3 closes the through hole 22. At this time, the refrigerant flows into the first channel 211 and then flows out through the throttling channel 31. In the second state, as Figure 3 and Figure 4 shown, the valve core 3 opens the through hole 22. At this time, the refrigerant enters the second channel 212 and the first channel 211 in sequence and then flows out through the through hole 22. At this time, the refrigerant hardly enters the throttling channel 31.

[0044] There are various ways to achieve that the cross-sectional area of the first channel 211 is larger than that of the second channel 212. In one embodiment, a step 210 extending along the circumferential direction of the valve chamber 21 is formed on the peripheral wall of the valve chamber 21. The inner peripheral wall of the step 210 defines and forms the above-mentioned second channel 212. This step also serves as a limiting step to limit the further movement of the valve core 3 in the first direction X. When the valve core 3 is in the state of closing the through hole 22, the end face of the valve core 3 facing the step abuts against the step.

[0045] As Figure 2 and Figure 4 shown, in order to prevent the valve core from coming out of the first channel 211, the open end of the first channel 211 away from the second channel 212 has a tapered section 214, and the tapered section 214 gradually contracts along the axial direction of the valve body 1 in a direction away from the second channel 212.

[0046] A groove 213 extending along the circumferential direction is provided on the outer peripheral wall of the second channel 212, and a flange 11 located in the groove 213 is provided on the inner peripheral wall of the valve body 1 at a position corresponding to the groove 213, and the flange 11 extends along the circumferential direction of the groove 213. The existence of the groove 213 and the flange 11 limits the valve seat 2 on the one hand, and on the other hand, blocks the airflow entering between the valve body 1 and the valve seat 2 from flowing further along the second direction Y.

[0047] As Figure 2 shown, the joints between the peripheries of the two open ends of the throttling channel 31 and the corresponding end walls of the valve core 3 are all connected by a first fillet 4. It can be understood that through the design of the first fillet 4, when the refrigerant enters and exits the throttling channel 31, the flow is smoother, the degree of uneven flow field is reduced, and the noise is reduced.

[0048] As Figure 2As shown, the connection between the open peripheral edge of the second channel 212 far from the first channel 211 and the corresponding end wall of the valve seat 2 is transitionally connected by a second fillet 5. It can be understood that through the design of the second fillet 5, when the refrigerant passes through the open portion of the second channel 212, the flow is smoother, the degree of uneven flow field is reduced, and the noise is further reduced.

[0049] In one embodiment, as Figure 7 shown, the cross-section of the throttle channel 31 is circular, then the throttle channel 31 is cylindrical. Define the refrigerant flow rate flowing out of the valve body 1 as z, the diameter of the throttle channel 31 as y, and the number of the throttle channels 31 as x. Under the condition that the pressure difference of the throttle valve remains unchanged, the flow rate z, the diameter y, and the number x satisfy: z = b1 * x + exp(b2 * y) + y^b3 + b4; where, the unit of z is kg / h, the unit of y is mm, and b1 to b4 are constants, b1 is 35 to 40; b2 is 5 to 8; b3 is 1.1 to 1.3; b4 is -45 to -35.

[0050] It can be understood that by continuously changing the diameter and number of the throttle channels 31, the required refrigerant flow rate can be calculated, and there is no need to continuously mold the throttle valve to determine the refrigerant flow rate, which reduces the cost.

[0051] In another embodiment, as Figure 8 shown, the cross-section of the throttle channel 31 is square, such as rectangular, then the throttle channel 31 is in the shape of a cuboid. In one embodiment, as Figure 9 shown, the cross-section of the throttle channel 31 is oval. In other embodiments, a progressive throttle channel 31 can also be adopted, such as Figure 10 shown, the cross-sectional area of the throttle channel 31 gradually decreases along the second direction Y. The design of the progressive throttle channel 31 is beneficial to the fluid entering the throttle channel 31 from the first channel 211, and is beneficial to reducing the turbulence at the entrance of the fluid into the throttle channel 31, thereby reducing the noise.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A throttle valve, characterized in that, Comprising: A valve body (1) with a valve cavity (10) that is open at both ends inside; A valve seat (2) provided in the valve cavity (10). An inner part of the valve seat (2) defines a valve chamber (21) extending along the axial direction of the valve body (1). Both ends of the valve chamber (21) are open. Through holes (22) communicating the valve cavity (10) and the valve chamber (21) are formed on the peripheral wall of the valve seat (2); A valve core (3) provided in the valve chamber (21). At least two throttle channels (31) communicating with the valve chamber (21) penetrate through the valve core (3). The valve core (3) is arranged to be movable along the axial direction of the valve body (1) so as to open or close the through holes (22).

2. The throttle valve according to claim 1, wherein: The throttle channels (31) extend along the axial direction of the valve body (1). A direction intersecting with the axial direction of the valve body (1) is defined as the first direction (X). At least two of the throttle channels (31) are arranged at intervals along the first direction (X).

3. The throttle valve according to claim 1, wherein: There are at least two of the through holes (22), and they are arranged at intervals along the circumferential direction of the valve seat (2).

4. The throttle valve according to claim 1, characterized in that: A direction in which the valve core (3) moves towards closing the through holes (22) is defined as the second direction (Y). The valve chamber (21) includes a first channel (211) and a second channel (212) arranged in sequence along the second direction (Y). A cross-sectional area of the first channel (211) is larger than a cross-sectional area of the second channel (212). The valve core (3) is located in the first channel (211), and the through holes (22) are formed on the peripheral wall of the first channel (211).

5. The throttle valve according to claim 4, wherein: A groove (213) extending along the circumferential direction is formed on the outer peripheral wall of the second channel (212). A flange (11) located in the groove (213) is provided on the inner peripheral wall of the valve body (1) at a position corresponding to the groove (213). The flange (11) extends along the circumferential direction of the groove (213).

6. The throttle valve according to claim 1, characterized in that: Junctions between the peripheries of both open ends of the throttle channels (31) and the corresponding end walls of the valve core (3) are all connected by first rounded corners (4) for transition.

7. The throttle valve according to claim 4, characterized in that: A junction between the open periphery of the second channel (212) far from the first channel (211) and the corresponding end wall of the valve seat (2) is connected by a second rounded corner (5) for transition.

8. The throttle valve according to any one of claims 1 to 7, characterized in that: The cross-section of the throttle channel (31) is circular. Defining the refrigerant flow rate flowing out through the valve body (1) as z, the diameter of the throttle channel (31) as y, and the number of the throttle channels (31) as x. Under the condition that the pressure difference of the throttle valve remains unchanged, the flow rate z, the diameter y, and the number x satisfy: z = b1 * x + exp(b2 * y) + y^b3 + b4; where z is in kg / h, y is in mm, and b1 to b4 are constants, b1 is 35 to 40; b2 is 5 to 8; b3 is 1.1 to 1.3; b4 is -45 to -35.

9. The throttle valve according to any one of claims 1 to 7, characterized in that: The cross-section of the throttle channel (31) is square or oval.

10. The throttle valve according to any one of claims 1 to 7, characterized in that: Define the direction in which the valve core (3) moves towards closing the through hole (22) as the second direction (Y), and the cross-sectional area of the throttling channel (31) gradually decreases along the second direction (Y).

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