Filtering one-way valve

Abstract

The utility model discloses a filtering one-way valve which comprises an outer shell, an inner valve body is arranged in the outer shell, a filtering net is arranged at the front end of the interior of the inner valve body, a ball sealer is arranged at the rear end of the interior of the inner valve body in a sliding mode, and a spring is arranged on the rear side of the ball sealer. The fluid input pressure is convenient to control, the filter screen is designed to filter impurities and foreign matter, the whole material is not affected by the brazing temperature, wet cloth wrapping welding can be not needed, and the durability is improved through the copper steel structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to refrigeration system accessory technical field, concretely is a filter check valve. BACKGROUND

[0002] The check valve is the common accessory in the refrigeration system, and the conventional red copper check valve structure does not have a filter screen, and is operated through the valve rod and the envelope falling body mode, and when the falling body is inclined and the envelope cooperation is abnormal, there is a risk of backflow, and impurities and foreign matters enter the machine body and damage the equipment, and the plastic component needs to be wrapped with a wet cloth for welding, otherwise the welding high temperature can burn the component and affect the use. SUMMARY

[0003] The utility model discloses a filter check valve to solve the problems in the above background.

[0004] The utility model discloses a technical scheme as follows:

[0005] A filter check valve, comprising an outer shell, an inner valve body is arranged in the outer shell, a filter screen is arranged at the front end of the inner valve body, a blocking ball is slidably arranged at the rear end of the inner valve body, and a spring is arranged at the rear side of the blocking ball.

[0006] Preferably, the inner valve body comprises a filter cavity at the front end and a sliding channel at the rear end, and the sliding channel comprises two sliding plates, and the two sliding plates are provided with arc-shaped sliding grooves on the opposite surfaces.

[0007] Preferably, the filter screen is arranged in the filter cavity and is fixed by an envelope at the front end of the filter cavity.

[0008] Preferably, the blocking ball is slidably arranged in the sliding channel, the diameter of the blocking ball is greater than the inner diameter of the filter cavity, and gaps exist between the left and right sides of the blocking ball and the inner wall of the outer shell.

[0009] Preferably, the spring is arranged at the rear end of the sliding channel, the front end of the spring is in contact with the blocking ball, and the rear end of the spring is limited by a clamping sleeve arranged at the rear end of the sliding channel.

[0010] Preferably, the filter screen is fixed to the rear side of the envelope by brazing.

[0011] As the above technical scheme is adopted, the utility model has the beneficial effects as follows:

[0012] In the utility model, the clamping sleeve is designed to fix the steel ball and the steel spring to prevent them from sliding out, the fluid input pressure is controlled, the filter screen is designed to filter impurities and foreign matters, the overall material quality is not affected by the brazing welding temperature, the wet cloth is not needed for welding, and the copper-steel structure improves the durability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1This is a cross-sectional view of the present invention;

[0014] Fig. 2 This is a vertical sectional view of the present invention;

[0015] Fig. 3 This is a schematic diagram of the overall structure of this utility model;

[0016] In the diagram: 1. Outer shell; 2. Inner valve body; 21. Filter chamber; 22. Slide rail; 3. Filter screen; 4. Blocking ball; 5. Spring; 6. Seal; 7. Compression sleeve. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below.

[0018] The "range" disclosed in this utility model is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10–50 is listed for a specific parameter, it is also expected that ranges of 10–40 and 20–50 are also included. Furthermore, if the minimum range values ​​are listed as 1 and 2, and the maximum range values ​​are listed as 3, 4, and 5, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0–5" means that all real numbers between "0–5" have been listed herein; "0–5" is merely a shortened representation of these numerical combinations.

[0019] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0020] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0021] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0022] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0023] Unless otherwise specified, the reaction will proceed under normal temperature and pressure conditions.

[0024] Unless otherwise specified, all parts or percentages are by weight or by weight percentage.

[0025] In this invention, all the substances used are known substances that can be purchased or synthesized by known methods.

[0026] In this invention, all the devices or equipment used are conventional devices or equipment known in the art and are readily available.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] Example:

[0029] A filter check valve, such as Figs. 1-3 As shown, it includes an outer shell 1, an inner valve body 2 inside the outer shell 1, a filter screen 3 at the front end inside the inner valve body 2, a sealing ball 4 slidingly inside the rear end of the inner valve body 2, and a spring 5 at the rear side of the sealing ball 4.

[0030] In one possible implementation, both the filter screen 3 and the sealing ball 4 are made of steel.

[0031] In one possible implementation, the inner valve body 2 includes a front-end filter chamber 21 and a rear-end slide 22. The slide 22 includes two slide plates, one above the other, and an arc-shaped groove is provided on each of the two slide plates opposite each other.

[0032] In one possible implementation, the filter screen 3 is disposed inside the filter chamber 21 and is fixed by the sleeve 6 at the front end of the filter chamber 21.

[0033] In one possible implementation, the blocking ball 4 is slidably disposed in the slide 22, the diameter of the blocking ball 4 is larger than the inner diameter of the filter cavity 21, and there are gaps between the left and right sides of the blocking ball 4 and the inner wall of the outer shell 1.

[0034] In one possible implementation, the spring 5 is located at the rear end of the slide 22, the front end of the spring 5 is in contact with the blocking ball 4, and the rear end of the spring 5 is limited by the retaining sleeve 7 located at the rear end of the slide 22.

[0035] In one possible implementation, both the envelope 6 and the card sleeve 7 are made of copper.

[0036] In one possible implementation, the filter screen 3 is fixed to the rear side of the cover 6 by brazing.

[0037] In one possible implementation, the one-way valve is designed to control the liquid input pressure using a steel ball and a steel spring. The tensile properties and number of turns of the steel spring can be adjusted according to the actual application pressure. At the same time, the matching dimensions of the inner diameter of the copper sleeve and the outer diameter of the steel ball can be adjusted to meet different system parameters. The steel ball and the conical surface of the copper sleeve seal prevent backflow. The steel ball and the steel spring are fixed with a copper snap-fit ​​design to prevent slippage. A filter screen is designed at the other end of the copper sleeve to filter impurities and foreign objects. The filter screen is fixed by brazing to prevent it from falling off.

[0038] In one possible implementation, this product is suitable for R134a, R22, R407, R404a, and R410a refrigerants, and can be used for fluid temperatures ranging from -30°C to +120°C.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter check valve, characterized in that: It includes an outer shell (1), an inner valve body (2) is provided inside the outer shell (1), a filter screen (3) is provided at the front end of the inner valve body (2), a sealing ball (4) is slidably provided at the rear end of the inner valve body (2), and a spring (5) is provided at the rear side of the sealing ball (4).

2. A filter check valve as described in claim 1, characterized in that: The inner valve body (2) includes a front-end filter chamber (21) and a rear-end slide (22). The slide (22) includes two slide plates, one above the other, and an arc-shaped groove is provided on each of the two slide plates opposite each other.

3. A filter check valve as described in claim 2, characterized in that: The filter screen (3) is located inside the filter chamber (21) and is fixed by the cover (6) at the front end of the filter chamber (21).

4. A filter check valve as described in claim 2, characterized in that: The sealing ball (4) is slidably disposed in the slide (22). The diameter of the sealing ball (4) is larger than the inner diameter of the filter cavity (21). There are gaps between the left and right sides of the sealing ball (4) and the inner wall of the outer shell (1).

5. A filter check valve as described in claim 2, characterized in that: The spring (5) is located at the rear end of the slide (22), the front end of the spring (5) is in contact with the blocking ball (4), and the rear end of the spring (5) is limited by the sleeve (7) located at the rear end of the slide (22).

6. A filter check valve as described in claim 1, characterized in that: The filter screen (3) is fixed to the rear side of the cover (6) by brazing.

Images